Add files using upload-large-folder tool

venv/lib/python3.10/site-packages/Cython/Build/BuildExecutable.py

@@ -0,0 +1,169 @@
+"""
+Compile a Python script into an executable that embeds CPython.
+Requires CPython to be built as a shared library ('libpythonX.Y').
+
+Basic usage:
+
+    python -m Cython.Build.BuildExecutable [ARGS] somefile.py
+"""
+
+
+DEBUG = True
+
+import sys
+import os
+if sys.version_info < (3, 9):
+    from distutils import sysconfig as _sysconfig
+
+    class sysconfig:
+
+        @staticmethod
+        def get_path(name):
+            assert name == 'include'
+            return _sysconfig.get_python_inc()
+
+        get_config_var = staticmethod(_sysconfig.get_config_var)
+else:
+    # sysconfig can be trusted from cpython >= 3.8.7
+    import sysconfig
+
+
+def get_config_var(name, default=''):
+    return sysconfig.get_config_var(name) or default
+
+INCDIR = sysconfig.get_path('include')
+LIBDIR1 = get_config_var('LIBDIR')
+LIBDIR2 = get_config_var('LIBPL')
+PYLIB = get_config_var('LIBRARY')
+PYLIB_DYN = get_config_var('LDLIBRARY')
+if PYLIB_DYN == PYLIB:
+    # no shared library
+    PYLIB_DYN = ''
+else:
+    PYLIB_DYN = os.path.splitext(PYLIB_DYN[3:])[0]  # 'lib(XYZ).so' -> XYZ
+
+CC = get_config_var('CC', os.environ.get('CC', ''))
+CFLAGS = get_config_var('CFLAGS') + ' ' + os.environ.get('CFLAGS', '')
+LINKCC = get_config_var('LINKCC', os.environ.get('LINKCC', CC))
+LINKFORSHARED = get_config_var('LINKFORSHARED')
+LIBS = get_config_var('LIBS')
+SYSLIBS = get_config_var('SYSLIBS')
+EXE_EXT = sysconfig.get_config_var('EXE')
+
+
+def _debug(msg, *args):
+    if DEBUG:
+        if args:
+            msg = msg % args
+        sys.stderr.write(msg + '\n')
+
+
+def dump_config():
+    _debug('INCDIR: %s', INCDIR)
+    _debug('LIBDIR1: %s', LIBDIR1)
+    _debug('LIBDIR2: %s', LIBDIR2)
+    _debug('PYLIB: %s', PYLIB)
+    _debug('PYLIB_DYN: %s', PYLIB_DYN)
+    _debug('CC: %s', CC)
+    _debug('CFLAGS: %s', CFLAGS)
+    _debug('LINKCC: %s', LINKCC)
+    _debug('LINKFORSHARED: %s', LINKFORSHARED)
+    _debug('LIBS: %s', LIBS)
+    _debug('SYSLIBS: %s', SYSLIBS)
+    _debug('EXE_EXT: %s', EXE_EXT)
+
+
+def _parse_args(args):
+    cy_args = []
+    last_arg = None
+    for i, arg in enumerate(args):
+        if arg.startswith('-'):
+            cy_args.append(arg)
+        elif last_arg in ('-X', '--directive'):
+            cy_args.append(arg)
+        else:
+            input_file = arg
+            args = args[i+1:]
+            break
+        last_arg = arg
+    else:
+        raise ValueError('no input file provided')
+
+    return input_file, cy_args, args
+
+
+def runcmd(cmd, shell=True):
+    if shell:
+        cmd = ' '.join(cmd)
+        _debug(cmd)
+    else:
+        _debug(' '.join(cmd))
+
+    import subprocess
+    returncode = subprocess.call(cmd, shell=shell)
+
+    if returncode:
+        sys.exit(returncode)
+
+
+def clink(basename):
+    runcmd([LINKCC, '-o', basename + EXE_EXT, basename+'.o', '-L'+LIBDIR1, '-L'+LIBDIR2]
+           + [PYLIB_DYN and ('-l'+PYLIB_DYN) or os.path.join(LIBDIR1, PYLIB)]
+           + LIBS.split() + SYSLIBS.split() + LINKFORSHARED.split())
+
+
+def ccompile(basename):
+    runcmd([CC, '-c', '-o', basename+'.o', basename+'.c', '-I' + INCDIR] + CFLAGS.split())
+
+
+def cycompile(input_file, options=()):
+    from ..Compiler import Version, CmdLine, Main
+    options, sources = CmdLine.parse_command_line(list(options or ()) + ['--embed', input_file])
+    _debug('Using Cython %s to compile %s', Version.version, input_file)
+    result = Main.compile(sources, options)
+    if result.num_errors > 0:
+        sys.exit(1)
+
+
+def exec_file(program_name, args=()):
+    runcmd([os.path.abspath(program_name)] + list(args), shell=False)
+
+
+def build(input_file, compiler_args=(), force=False):
+    """
+    Build an executable program from a Cython module.
+
+    Returns the name of the executable file.
+    """
+    basename = os.path.splitext(input_file)[0]
+    exe_file = basename + EXE_EXT
+    if not force and os.path.abspath(exe_file) == os.path.abspath(input_file):
+        raise ValueError("Input and output file names are the same, refusing to overwrite")
+    if (not force and os.path.exists(exe_file) and os.path.exists(input_file)
+            and os.path.getmtime(input_file) <= os.path.getmtime(exe_file)):
+        _debug("File is up to date, not regenerating %s", exe_file)
+        return exe_file
+    cycompile(input_file, compiler_args)
+    ccompile(basename)
+    clink(basename)
+    return exe_file
+
+
+def build_and_run(args):
+    """
+    Build an executable program from a Cython module and run it.
+
+    Arguments after the module name will be passed verbatimly to the program.
+    """
+    program_name, args = _build(args)
+    exec_file(program_name, args)
+
+
+def _build(args):
+    input_file, cy_args, args = _parse_args(args)
+    program_name = build(input_file, cy_args)
+    return program_name, args
+
+
+if __name__ == '__main__':
+    _build(sys.argv[1:])

venv/lib/python3.10/site-packages/Cython/Build/Cache.py

@@ -0,0 +1,199 @@
+from dataclasses import dataclass
+import sys
+import os
+import hashlib
+import shutil
+import subprocess
+from ..Utils import safe_makedirs, cached_function
+import zipfile
+from .. import __version__
+
+try:
+    import zlib
+
+    zipfile_compression_mode = zipfile.ZIP_DEFLATED
+except ImportError:
+    zipfile_compression_mode = zipfile.ZIP_STORED
+
+try:
+    import gzip
+
+    gzip_open = gzip.open
+    gzip_ext = ".gz"
+except ImportError:
+    gzip_open = open
+    gzip_ext = ""
+
+zip_ext = ".zip"
+
+MAX_CACHE_SIZE = 1024 * 1024 * 100
+
+join_path = cached_function(os.path.join)
+
+
+@cached_function
+def file_hash(filename):
+    path = os.path.normpath(filename)
+    prefix = ("%d:%s" % (len(path), path)).encode("UTF-8")
+    m = hashlib.sha256(prefix)
+    with open(path, "rb") as f:
+        data = f.read(65000)
+        while data:
+            m.update(data)
+            data = f.read(65000)
+    return m.hexdigest()
+
+
+@cached_function
+def get_cython_cache_dir():
+    r"""
+    Return the base directory containing Cython's caches.
+
+    Priority:
+
+    1. CYTHON_CACHE_DIR
+    2. (OS X): ~/Library/Caches/Cython
+       (posix not OS X): XDG_CACHE_HOME/cython if XDG_CACHE_HOME defined
+    3. ~/.cython
+
+    """
+    if "CYTHON_CACHE_DIR" in os.environ:
+        return os.environ["CYTHON_CACHE_DIR"]
+
+    parent = None
+    if os.name == "posix":
+        if sys.platform == "darwin":
+            parent = os.path.expanduser("~/Library/Caches")
+        else:
+            # this could fallback on ~/.cache
+            parent = os.environ.get("XDG_CACHE_HOME")
+
+    if parent and os.path.isdir(parent):
+        return join_path(parent, "cython")
+
+    # last fallback: ~/.cython
+    return os.path.expanduser(join_path("~", ".cython"))
+
+
+@dataclass
+class FingerprintFlags:
+    language: str = "c"
+    py_limited_api: bool = False
+    np_pythran: bool = False
+
+    def get_fingerprint(self):
+        return str((self.language, self.py_limited_api, self.np_pythran))
+
+
+class Cache:
+    def __init__(self, path, cache_size=None):
+        if path is None:
+            self.path = join_path(get_cython_cache_dir(), "compiler")
+        else:
+            self.path = path
+        self.cache_size = cache_size if cache_size is not None else MAX_CACHE_SIZE
+        if not os.path.exists(self.path):
+            os.makedirs(self.path)
+
+    def transitive_fingerprint(
+        self, filename, dependencies, compilation_options, flags=FingerprintFlags()
+    ):
+        r"""
+        Return a fingerprint of a cython file that is about to be cythonized.
+
+        Fingerprints are looked up in future compilations. If the fingerprint
+        is found, the cythonization can be skipped. The fingerprint must
+        incorporate everything that has an influence on the generated code.
+        """
+        try:
+            m = hashlib.sha256(__version__.encode("UTF-8"))
+            m.update(file_hash(filename).encode("UTF-8"))
+            for x in sorted(dependencies):
+                if os.path.splitext(x)[1] not in (".c", ".cpp", ".h"):
+                    m.update(file_hash(x).encode("UTF-8"))
+            # Include the module attributes that change the compilation result
+            # in the fingerprint. We do not iterate over module.__dict__ and
+            # include almost everything here as users might extend Extension
+            # with arbitrary (random) attributes that would lead to cache
+            # misses.
+            m.update(flags.get_fingerprint().encode("UTF-8"))
+            m.update(compilation_options.get_fingerprint().encode("UTF-8"))
+            return m.hexdigest()
+        except OSError:
+            return None
+
+    def fingerprint_file(self, cfile, fingerprint, ext):
+        return (
+            join_path(self.path, "%s-%s" % (os.path.basename(cfile), fingerprint)) + ext
+        )
+
+    def lookup_cache(self, c_file, fingerprint):
+        # Cython-generated c files are highly compressible.
+        # (E.g. a compression ratio of about 10 for Sage).
+        if not os.path.exists(self.path):
+            safe_makedirs(self.path)
+        gz_fingerprint_file = self.fingerprint_file(c_file, fingerprint, gzip_ext)
+        if os.path.exists(gz_fingerprint_file):
+            return gz_fingerprint_file
+        zip_fingerprint_file = self.fingerprint_file(c_file, fingerprint, zip_ext)
+        if os.path.exists(zip_fingerprint_file):
+            return zip_fingerprint_file
+        return None
+
+    def load_from_cache(self, c_file, cached):
+        ext = os.path.splitext(cached)[1]
+        if ext == gzip_ext:
+            os.utime(cached, None)
+            with gzip_open(cached, "rb") as g:
+                with open(c_file, "wb") as f:
+                    shutil.copyfileobj(g, f)
+        elif ext == zip_ext:
+            os.utime(cached, None)
+            dirname = os.path.dirname(c_file)
+            with zipfile.ZipFile(cached) as z:
+                for artifact in z.namelist():
+                    z.extract(artifact, join_path(dirname, artifact))
+        else:
+            raise ValueError(f"Unsupported cache file extension: {ext}")
+
+    def store_to_cache(self, c_file, fingerprint, compilation_result):
+        artifacts = compilation_result.get_generated_source_files()
+        if len(artifacts) == 1:
+            fingerprint_file = self.fingerprint_file(c_file, fingerprint, gzip_ext)
+            with open(c_file, "rb") as f:
+                with gzip_open(fingerprint_file + ".tmp", "wb") as g:
+                    shutil.copyfileobj(f, g)
+        else:
+            fingerprint_file = self.fingerprint_file(c_file, fingerprint, zip_ext)
+            with zipfile.ZipFile(
+                fingerprint_file + ".tmp", "w", zipfile_compression_mode
+            ) as zip:
+                for artifact in artifacts:
+                    zip.write(artifact, os.path.basename(artifact))
+        os.rename(fingerprint_file + ".tmp", fingerprint_file)
+
+    def cleanup_cache(self, ratio=0.85):
+        try:
+            completed_process = subprocess.run(
+                ["du", "-s", "-k", os.path.abspath(self.path)], stdout=subprocess.PIPE
+            )
+            stdout = completed_process.stdout
+            if completed_process.returncode == 0:
+                total_size = 1024 * int(stdout.strip().split()[0])
+                if total_size < self.cache_size:
+                    return
+        except (OSError, ValueError):
+            pass
+        total_size = 0
+        all = []
+        for file in os.listdir(self.path):
+            path = join_path(self.path, file)
+            s = os.stat(path)
+            total_size += s.st_size
+            all.append((s.st_atime, s.st_size, path))
+        if total_size > self.cache_size:
+            for time, size, file in reversed(sorted(all)):
+                os.unlink(file)
+                total_size -= size
+                if total_size < self.cache_size * ratio:
+                    break

venv/lib/python3.10/site-packages/Cython/Build/Cythonize.py

@@ -0,0 +1,350 @@
+import concurrent.futures
+import os
+import shutil
+import sys
+import tempfile
+from collections import defaultdict
+from contextlib import contextmanager
+
+from .Dependencies import cythonize, extended_iglob
+from ..Utils import is_package_dir
+from ..Compiler import Options
+
+try:
+    import multiprocessing
+    parallel_compiles = int(multiprocessing.cpu_count() * 1.5)
+except ImportError:
+    multiprocessing = None
+    parallel_compiles = 0
+
+
+def find_package_base(path):
+    base_dir, package_path = os.path.split(path)
+    while is_package_dir(base_dir):
+        base_dir, parent = os.path.split(base_dir)
+        package_path = '%s/%s' % (parent, package_path)
+    return base_dir, package_path
+
+
+def cython_compile(path_pattern, options) -> dict:
+    all_paths = map(os.path.abspath, extended_iglob(path_pattern))
+    ext_modules_by_basedir = _cython_compile_files(all_paths, options)
+    _build(list(ext_modules_by_basedir.items()), options.parallel)
+
+
+def _cython_compile_files(all_paths, options) -> dict:
+    ext_modules_to_build = defaultdict(list)
+
+    for path in all_paths:
+        if options.build_inplace:
+            base_dir = path
+            while not os.path.isdir(base_dir) or is_package_dir(base_dir):
+                base_dir = os.path.dirname(base_dir)
+        else:
+            base_dir = None
+
+        if os.path.isdir(path):
+            # recursively compiling a package
+            paths = [os.path.join(path, '**', '*.{py,pyx}')]
+        else:
+            # assume it's a file(-like thing)
+            paths = [path]
+
+        ext_modules = cythonize(
+            paths,
+            nthreads=options.parallel,
+            exclude_failures=options.keep_going,
+            exclude=options.excludes,
+            compiler_directives=options.directives,
+            compile_time_env=options.compile_time_env,
+            force=options.force,
+            quiet=options.quiet,
+            depfile=options.depfile,
+            language=options.language,
+            **options.options)
+
+        if ext_modules and options.build:
+            ext_modules_to_build[base_dir].extend(ext_modules)
+
+    return dict(ext_modules_to_build)
+
+
+@contextmanager
+def _interruptible_pool(pool_cm):
+    with pool_cm as proc_pool:
+        try:
+            yield proc_pool
+        except KeyboardInterrupt:
+            proc_pool.terminate_workers()
+            proc_pool.shutdown(cancel_futures=True)
+            raise
+
+
+def _build(ext_modules, parallel):
+    modcount = sum(len(modules) for _, modules in ext_modules)
+    if not modcount:
+        return
+
+    serial_execution_mode = modcount == 1 or parallel < 2
+
+    try:
+        pool_cm = (
+            None if serial_execution_mode
+            else concurrent.futures.ProcessPoolExecutor(max_workers=parallel)
+        )
+    except (OSError, ImportError):
+        # `OSError` is a historic exception in `multiprocessing`
+        # `ImportError` happens e.g. under pyodide (`ModuleNotFoundError`)
+        serial_execution_mode = True
+
+    if serial_execution_mode:
+        for ext in ext_modules:
+            run_distutils(ext)
+        return
+
+    with _interruptible_pool(pool_cm) as proc_pool:
+        compiler_tasks = [
+            proc_pool.submit(run_distutils, (base_dir, [ext]))
+            for base_dir, modules in ext_modules
+            for ext in modules
+        ]
+
+        concurrent.futures.wait(compiler_tasks, return_when=concurrent.futures.FIRST_EXCEPTION)
+
+        worker_exceptions = []
+        for task in compiler_tasks:  # discover any crashes
+            try:
+                task.result()
+            except BaseException as proc_err:  # could be SystemExit
+                worker_exceptions.append(proc_err)
+
+        if worker_exceptions:
+            exc_msg = 'Compiling Cython modules failed with these errors:\n\n'
+            exc_msg += '\n\t* '.join(('', *map(str, worker_exceptions)))
+            exc_msg += '\n\n'
+
+            non_base_exceptions = [
+                exc for exc in worker_exceptions
+                if isinstance(exc, Exception)
+            ]
+            if sys.version_info[:2] >= (3, 11) and non_base_exceptions:
+                raise ExceptionGroup(exc_msg, non_base_exceptions)
+            else:
+                raise RuntimeError(exc_msg) from worker_exceptions[0]
+
+
+def run_distutils(args):
+    try:
+        from distutils.core import setup
+    except ImportError:
+        try:
+            from setuptools import setup
+        except ImportError:
+            raise ImportError("'distutils' is not available. Please install 'setuptools' for binary builds.")
+
+    base_dir, ext_modules = args
+    script_args = ['build_ext', '-i']
+    cwd = os.getcwd()
+    temp_dir = None
+    try:
+        if base_dir:
+            os.chdir(base_dir)
+            temp_dir = tempfile.mkdtemp(dir=base_dir)
+            script_args.extend(['--build-temp', temp_dir])
+        setup(
+            script_name='setup.py',
+            script_args=script_args,
+            ext_modules=ext_modules,
+        )
+    finally:
+        if base_dir:
+            os.chdir(cwd)
+            if temp_dir and os.path.isdir(temp_dir):
+                shutil.rmtree(temp_dir)
+
+
+def benchmark(code, setup_code=None, import_module=None, directives=None):
+    from Cython.Build.Inline import cymeit
+
+    timings, number = cymeit(code, setup_code, import_module, directives, repeat=9)
+
+    # Based on 'timeit.main()' in CPython 3.13.
+    units = {"nsec": 1e-9, "usec": 1e-6, "msec": 1e-3, "sec": 1.0}
+    scales = [(scale, unit) for unit, scale in reversed(units.items())]  # biggest first
+
+    def format_time(t):
+        for scale, unit in scales:
+            if t >= scale:
+                break
+        else:
+            raise RuntimeError("Timing is below nanoseconds: {t:f}")
+        return f"{t / scale :.3f} {unit}"
+
+    timings.sort()
+    assert len(timings) & 1 == 1  # odd number of timings, for median position
+    fastest, median, slowest = timings[0], timings[len(timings) // 2], timings[-1]
+
+    print(f"{number} loops, best of {len(timings)}: {format_time(fastest)} per loop (median: {format_time(median)})")
+
+    if slowest > fastest * 4:
+        print(
+            "The timings are likely unreliable. "
+            f"The worst time ({format_time(slowest)}) was more than four times "
+            f"slower than the best time ({format_time(fastest)}).")
+
+
+def create_args_parser():
+    from argparse import ArgumentParser, RawDescriptionHelpFormatter
+    from ..Compiler.CmdLine import ParseDirectivesAction, ParseOptionsAction, ParseCompileTimeEnvAction
+
+    parser = ArgumentParser(
+        formatter_class=RawDescriptionHelpFormatter,
+        epilog="""\
+Environment variables:
+  CYTHON_FORCE_REGEN: if set to 1, forces cythonize to regenerate the output files regardless
+        of modification times and changes.
+  CYTHON_CACHE_DIR: the base directory containing Cython's caches.
+  Environment variables accepted by setuptools are supported to configure the C compiler and build:
+  https://setuptools.pypa.io/en/latest/userguide/ext_modules.html#compiler-and-linker-options"""
+    )
+
+    parser.add_argument('-X', '--directive', metavar='NAME=VALUE,...',
+                      dest='directives', default={}, type=str,
+                      action=ParseDirectivesAction,
+                      help='set a compiler directive')
+    parser.add_argument('-E', '--compile-time-env', metavar='NAME=VALUE,...',
+                      dest='compile_time_env', default={}, type=str,
+                      action=ParseCompileTimeEnvAction,
+                      help='set a compile time environment variable')
+    parser.add_argument('-s', '--option', metavar='NAME=VALUE',
+                      dest='options', default={}, type=str,
+                      action=ParseOptionsAction,
+                      help='set a cythonize option')
+    parser.add_argument('-2', dest='language_level', action='store_const', const=2, default=None,
+                      help='use Python 2 syntax mode by default')
+    parser.add_argument('-3', dest='language_level', action='store_const', const=3,
+                      help='use Python 3 syntax mode by default')
+    parser.add_argument('--3str', dest='language_level', action='store_const', const=3,
+                      help='use Python 3 syntax mode by default (deprecated alias for -3)')
+    parser.add_argument('-+', '--cplus', dest='language', action='store_const', const='c++', default=None,
+                        help='Compile as C++ rather than C')
+    parser.add_argument('-a', '--annotate', action='store_const', const='default', dest='annotate',
+                      help='Produce a colorized HTML version of the source.')
+    parser.add_argument('--annotate-fullc', action='store_const', const='fullc', dest='annotate',
+                      help='Produce a colorized HTML version of the source '
+                           'which includes entire generated C/C++-code.')
+    parser.add_argument('-x', '--exclude', metavar='PATTERN', dest='excludes',
+                      action='append', default=[],
+                      help='exclude certain file patterns from the compilation')
+
+    parser.add_argument('-b', '--build', dest='build', action='store_true', default=None,
+                      help='build extension modules using distutils/setuptools')
+    parser.add_argument('-i', '--inplace', dest='build_inplace', action='store_true', default=None,
+                      help='build extension modules in place using distutils/setuptools (implies -b)')
+
+    parser.add_argument('--timeit', dest='benchmark', metavar="CODESTRING", type=str, default=None,
+                      help="build in place, then compile+run CODESTRING as benchmark in first module's namespace (implies -i)")
+    parser.add_argument('--setup', dest='benchmark_setup', metavar="CODESTRING", type=str, default=None,
+                      help="use CODESTRING as pre-benchmark setup code for --bench")
+
+    parser.add_argument('-j', '--parallel', dest='parallel', metavar='N',
+                      type=int, default=parallel_compiles,
+                      help=f'run builds in N parallel jobs (default: {parallel_compiles or 1})')
+    parser.add_argument('-f', '--force', dest='force', action='store_true', default=None,
+                      help='force recompilation')
+    parser.add_argument('-q', '--quiet', dest='quiet', action='store_true', default=None,
+                      help='be less verbose during compilation')
+
+    parser.add_argument('--lenient', dest='lenient', action='store_true', default=None,
+                      help='increase Python compatibility by ignoring some compile time errors')
+    parser.add_argument('-k', '--keep-going', dest='keep_going', action='store_true', default=None,
+                      help='compile as much as possible, ignore compilation failures')
+    parser.add_argument('--no-docstrings', dest='no_docstrings', action='store_true', default=None,
+                      help='strip docstrings')
+    parser.add_argument('-M', '--depfile', action='store_true', help='produce depfiles for the sources')
+    parser.add_argument('sources', nargs='*')
+    return parser
+
+
+def parse_args_raw(parser, args):
+    options, unknown = parser.parse_known_args(args)
+    sources = options.sources
+    # if positional arguments were interspersed
+    # some of them are in unknown
+    for option in unknown:
+        if option.startswith('-'):
+            parser.error("unknown option "+option)
+        else:
+            sources.append(option)
+    del options.sources
+    return (options, sources)
+
+
+def parse_args(args):
+    parser = create_args_parser()
+    options, args = parse_args_raw(parser, args)
+
+    if options.benchmark is not None:
+        options.build_inplace = True
+    elif not args:
+        parser.error("no source files provided")
+
+    if options.build_inplace:
+        options.build = True
+    if multiprocessing is None:
+        options.parallel = 0
+    if options.language_level:
+        assert options.language_level in (2, 3, '3str')
+        options.options['language_level'] = options.language_level
+
+    if options.lenient:
+        # increase Python compatibility by ignoring compile time errors
+        Options.error_on_unknown_names = False
+        Options.error_on_uninitialized = False
+
+    if options.annotate:
+        Options.annotate = options.annotate
+
+    if options.no_docstrings:
+        Options.docstrings = False
+
+    return options, args
+
+
+def main(args=None):
+    options, paths = parse_args(args)
+
+    all_paths = []
+    for path in paths:
+        expanded_path = [os.path.abspath(p) for p in extended_iglob(path)]
+        if not expanded_path:
+            print("{}: No such file or directory: '{}'".format(sys.argv[0], path), file=sys.stderr)
+            sys.exit(1)
+        all_paths.extend(expanded_path)
+
+    ext_modules_by_basedir = _cython_compile_files(all_paths, options)
+
+    if ext_modules_by_basedir and options.build:
+        _build(list(ext_modules_by_basedir.items()), options.parallel)
+
+    if options.benchmark is not None:
+        base_dir = import_module = None
+        if ext_modules_by_basedir:
+            base_dir, first_extensions = ext_modules_by_basedir.popitem()
+            if first_extensions:
+                import_module = first_extensions[0].name
+
+        if base_dir is not None:
+            sys.path.insert(0, base_dir)
+
+        benchmark(
+            options.benchmark, options.benchmark_setup,
+            import_module=import_module,
+        )
+
+        if base_dir is not None:
+            sys.path.remove(base_dir)
+
+
+if __name__ == '__main__':
+    main()

venv/lib/python3.10/site-packages/Cython/Build/Dependencies.py

@@ -0,0 +1,1311 @@
+import cython
+
+import collections
+import os
+import re, sys, time
+from glob import iglob
+from io import StringIO
+from os.path import relpath as _relpath
+from .Cache import Cache, FingerprintFlags
+
+from collections.abc import Iterable
+
+try:
+    import pythran
+except:
+    pythran = None
+
+from .. import Utils
+from ..Utils import (cached_function, cached_method, path_exists,
+    safe_makedirs, copy_file_to_dir_if_newer, is_package_dir, write_depfile)
+from ..Compiler import Errors
+from ..Compiler.Main import Context
+from ..Compiler import Options
+from ..Compiler.Options import (CompilationOptions, default_options,
+    get_directive_defaults)
+
+join_path = cached_function(os.path.join)
+copy_once_if_newer = cached_function(copy_file_to_dir_if_newer)
+safe_makedirs_once = cached_function(safe_makedirs)
+
+
+def _make_relative(file_paths, base=None):
+    if not base:
+        base = os.getcwd()
+    if base[-1] != os.path.sep:
+        base += os.path.sep
+    return [_relpath(path, base) if path.startswith(base) else path
+            for path in file_paths]
+
+
+def extended_iglob(pattern):
+    if '{' in pattern:
+        m = re.match('(.*){([^}]+)}(.*)', pattern)
+        if m:
+            before, switch, after = m.groups()
+            for case in switch.split(','):
+                for path in extended_iglob(before + case + after):
+                    yield path
+            return
+
+    # We always accept '/' and also '\' on Windows,
+    # because '/' is generally common for relative paths.
+    if '**/' in pattern or os.sep == '\\' and '**\\' in pattern:
+        seen = set()
+        first, rest = re.split(r'\*\*[%s]' % ('/\\\\' if os.sep == '\\' else '/'), pattern, 1)
+        if first:
+            first = iglob(first + os.sep)
+        else:
+            first = ['']
+        for root in first:
+            for path in extended_iglob(join_path(root, rest)):
+                if path not in seen:
+                    seen.add(path)
+                    yield path
+            for path in extended_iglob(join_path(root, '*', '**', rest)):
+                if path not in seen:
+                    seen.add(path)
+                    yield path
+    else:
+        for path in iglob(pattern):
+            yield path
+
+
+def nonempty(it, error_msg="expected non-empty iterator"):
+    empty = True
+    for value in it:
+        empty = False
+        yield value
+    if empty:
+        raise ValueError(error_msg)
+
+
+def update_pythran_extension(ext):
+    if pythran is None:
+        raise RuntimeError("You first need to install Pythran to use the np_pythran directive.")
+    try:
+        pythran_ext = pythran.config.make_extension(python=True)
+    except TypeError:  # older pythran version only
+        pythran_ext = pythran.config.make_extension()
+
+    ext.include_dirs.extend(pythran_ext['include_dirs'])
+    ext.extra_compile_args.extend(pythran_ext['extra_compile_args'])
+    ext.extra_link_args.extend(pythran_ext['extra_link_args'])
+    ext.define_macros.extend(pythran_ext['define_macros'])
+    ext.undef_macros.extend(pythran_ext['undef_macros'])
+    ext.library_dirs.extend(pythran_ext['library_dirs'])
+    ext.libraries.extend(pythran_ext['libraries'])
+    ext.language = 'c++'
+
+    # These options are not compatible with the way normal Cython extensions work
+    for bad_option in ["-fwhole-program", "-fvisibility=hidden"]:
+        try:
+            ext.extra_compile_args.remove(bad_option)
+        except ValueError:
+            pass
+
+
+def parse_list(s):
+    """
+    >>> parse_list("")
+    []
+    >>> parse_list("a")
+    ['a']
+    >>> parse_list("a b c")
+    ['a', 'b', 'c']
+    >>> parse_list("[a, b, c]")
+    ['a', 'b', 'c']
+    >>> parse_list('a " " b')
+    ['a', ' ', 'b']
+    >>> parse_list('[a, ",a", "a,", ",", ]')
+    ['a', ',a', 'a,', ',']
+    """
+    if len(s) >= 2 and s[0] == '[' and s[-1] == ']':
+        s = s[1:-1]
+        delimiter = ','
+    else:
+        delimiter = ' '
+    s, literals = strip_string_literals(s)
+    def unquote(literal):
+        literal = literal.strip()
+        if literal[0] in "'\"":
+            return literals[literal[1:-1]]
+        else:
+            return literal
+    return [unquote(item) for item in s.split(delimiter) if item.strip()]
+
+
+transitive_str = object()
+transitive_list = object()
+bool_or = object()
+
+distutils_settings = {
+    'name':                 str,
+    'sources':              list,
+    'define_macros':        list,
+    'undef_macros':         list,
+    'libraries':            transitive_list,
+    'library_dirs':         transitive_list,
+    'runtime_library_dirs': transitive_list,
+    'include_dirs':         transitive_list,
+    'extra_objects':        list,
+    'extra_compile_args':   transitive_list,
+    'extra_link_args':      transitive_list,
+    'export_symbols':       list,
+    'depends':              transitive_list,
+    'language':             transitive_str,
+    'np_pythran':           bool_or
+}
+
+
+def _legacy_strtobool(val):
+    # Used to be "distutils.util.strtobool", adapted for deprecation warnings.
+    if val == "True":
+        return True
+    elif val == "False":
+        return False
+
+    import warnings
+    warnings.warn("The 'np_python' option requires 'True' or 'False'", category=DeprecationWarning)
+    val = val.lower()
+    if val in ('y', 'yes', 't', 'true', 'on', '1'):
+        return True
+    elif val in ('n', 'no', 'f', 'false', 'off', '0'):
+        return False
+    else:
+        raise ValueError("invalid truth value %r" % (val,))
+
+
+class DistutilsInfo:
+
+    def __init__(self, source=None, exn=None):
+        self.values = {}
+        if source is not None:
+            source_lines = StringIO(source) if isinstance(source, str) else source
+            for line in source_lines:
+                line = line.lstrip()
+                if not line:
+                    continue
+                if line[0] != '#':
+                    break
+                line = line[1:].lstrip()
+                kind = next((k for k in ("distutils:","cython:") if line.startswith(k)), None)
+                if kind is not None:
+                    key, _, value = [s.strip() for s in line[len(kind):].partition('=')]
+                    type = distutils_settings.get(key, None)
+                    if line.startswith("cython:") and type is None: continue
+                    if type in (list, transitive_list):
+                        value = parse_list(value)
+                        if key == 'define_macros':
+                            value = [tuple(macro.split('=', 1))
+                                     if '=' in macro else (macro, None)
+                                     for macro in value]
+                    if type is bool_or:
+                        value = _legacy_strtobool(value)
+                    self.values[key] = value
+        elif exn is not None:
+            for key in distutils_settings:
+                if key in ('name', 'sources','np_pythran'):
+                    continue
+                value = getattr(exn, key, None)
+                if value:
+                    self.values[key] = value
+
+    def merge(self, other):
+        if other is None:
+            return self
+        for key, value in other.values.items():
+            type = distutils_settings[key]
+            if type is transitive_str and key not in self.values:
+                self.values[key] = value
+            elif type is transitive_list:
+                if key in self.values:
+                    # Change a *copy* of the list (Trac #845)
+                    all = self.values[key][:]
+                    for v in value:
+                        if v not in all:
+                            all.append(v)
+                    value = all
+                self.values[key] = value
+            elif type is bool_or:
+                self.values[key] = self.values.get(key, False) | value
+        return self
+
+    def subs(self, aliases):
+        if aliases is None:
+            return self
+        resolved = DistutilsInfo()
+        for key, value in self.values.items():
+            type = distutils_settings[key]
+            if type in [list, transitive_list]:
+                new_value_list = []
+                for v in value:
+                    if v in aliases:
+                        v = aliases[v]
+                    if isinstance(v, list):
+                        new_value_list += v
+                    else:
+                        new_value_list.append(v)
+                value = new_value_list
+            else:
+                if value in aliases:
+                    value = aliases[value]
+            resolved.values[key] = value
+        return resolved
+
+    def apply(self, extension):
+        for key, value in self.values.items():
+            type = distutils_settings[key]
+            if type in [list, transitive_list]:
+                value = getattr(extension, key) + list(value)
+            setattr(extension, key, value)
+
+
+_FIND_TOKEN = cython.declare(object, re.compile(r"""
+    (?P<comment> [#] ) |
+    (?P<brace> [{}] ) |
+    (?P<fstring> f )? (?P<quote> '+ | "+ )
+""", re.VERBOSE).search)
+
+_FIND_STRING_TOKEN = cython.declare(object, re.compile(r"""
+    (?P<escape> [\\]+ ) (?P<escaped_quote> ['"] ) |
+    (?P<fstring> f )? (?P<quote> '+ | "+ )
+""", re.VERBOSE).search)
+
+_FIND_FSTRING_TOKEN = cython.declare(object, re.compile(r"""
+    (?P<braces> [{]+ | [}]+ ) |
+    (?P<escape> [\\]+ ) (?P<escaped_quote> ['"] ) |
+    (?P<fstring> f )? (?P<quote> '+ | "+ )
+""", re.VERBOSE).search)
+
+
+def strip_string_literals(code: str, prefix: str = '__Pyx_L'):
+    """
+    Normalizes every string literal to be of the form '__Pyx_Lxxx',
+    returning the normalized code and a mapping of labels to
+    string literals.
+    """
+    new_code: list = []
+    literals: dict = {}
+    counter: cython.Py_ssize_t = 0
+    find_token = _FIND_TOKEN
+
+    def append_new_label(literal):
+        nonlocal counter
+        counter += 1
+        label = f"{prefix}{counter}_"
+        literals[label] = literal
+        new_code.append(label)
+
+    def parse_string(quote_type: str, start: cython.Py_ssize_t, is_fstring: cython.bint) -> cython.Py_ssize_t:
+        charpos: cython.Py_ssize_t = start
+
+        find_token = _FIND_FSTRING_TOKEN if is_fstring else _FIND_STRING_TOKEN
+
+        while charpos != -1:
+            token = find_token(code, charpos)
+            if token is None:
+                # This probably indicates an unclosed string literal, i.e. a broken file.
+                append_new_label(code[start:])
+                charpos = -1
+                break
+            charpos = token.end()
+
+            if token['escape']:
+                if len(token['escape']) % 2 == 0 and token['escaped_quote'] == quote_type[0]:
+                    # Quote is not actually escaped and might be part of a terminator, look at it next.
+                    charpos -= 1
+
+            elif is_fstring and token['braces']:
+                # Formats or brace(s) in fstring.
+                if len(token['braces']) % 2 == 0:
+                    # Normal brace characters in string.
+                    continue
+                if token['braces'][-1] == '{':
+                    if start < charpos-1:
+                        append_new_label(code[start : charpos-1])
+                    new_code.append('{')
+                    start = charpos = parse_code(charpos, in_fstring=True)
+
+            elif token['quote'].startswith(quote_type):
+                # Closing quote found (potentially together with further, unrelated quotes).
+                charpos = token.start('quote')
+                if charpos > start:
+                    append_new_label(code[start : charpos])
+                new_code.append(quote_type)
+                charpos += len(quote_type)
+                break
+
+        return charpos
+
+    def parse_code(start: cython.Py_ssize_t, in_fstring: cython.bint = False) -> cython.Py_ssize_t:
+        charpos: cython.Py_ssize_t = start
+        end: cython.Py_ssize_t
+        quote: str
+
+        while charpos != -1:
+            token = find_token(code, charpos)
+            if token is None:
+                new_code.append(code[start:])
+                charpos = -1
+                break
+            charpos = end = token.end()
+
+            if token['quote']:
+                quote = token['quote']
+                if len(quote) >= 6:
+                    # Ignore empty tripple-quoted strings: '''''' or """"""
+                    quote = quote[:len(quote) % 6]
+                if quote and len(quote) != 2:
+                    if len(quote) > 3:
+                        end -= len(quote) - 3
+                        quote = quote[:3]
+                    new_code.append(code[start:end])
+                    start = charpos = parse_string(quote, end, is_fstring=token['fstring'])
+
+            elif token['comment']:
+                new_code.append(code[start:end])
+                charpos = code.find('\n', end)
+                append_new_label(code[end : charpos if charpos != -1 else None])
+                if charpos == -1:
+                    break  # EOF
+                start = charpos
+
+            elif in_fstring and token['brace']:
+                if token['brace'] == '}':
+                    # Closing '}' of f-string.
+                    charpos = end = token.start() + 1
+                    new_code.append(code[start:end])  # with '}'
+                    break
+                else:
+                    # Starting a calculated format modifier inside of an f-string format.
+                    end = token.start() + 1
+                    new_code.append(code[start:end])  # with '{'
+                    start = charpos = parse_code(end, in_fstring=True)
+
+        return charpos
+
+    parse_code(0)
+    return "".join(new_code), literals
+
+
+# We need to allow spaces to allow for conditional compilation like
+# IF ...:
+#     cimport ...
+dependency_regex = re.compile(
+    r"(?:^ [ \t\f]* from     [ \t\f]+ cython\.cimports\.([\w.]+) [ \t\f]+ c?import ) |"
+    r"(?:^ [ \t\f]* from     [ \t\f]+ ([\w.]+) [ \t\f]+ cimport ) |"
+    r"(?:^ [ \t\f]* c?import [ \t\f]+ cython\.cimports\.([\w.]+) ) |"
+    r"(?:^ [ \t\f]* cimport  [ \t\f]+ ([\w.]+ (?:[ \t\f]* , [ \t\f]* [\w.]+)*) ) |"
+    r"(?:^ [ \t\f]* cdef     [ \t\f]+ extern [ \t\f]+ from [ \t\f]+ ['\"] ([^'\"]+) ['\"] ) |"
+    r"(?:^ [ \t\f]* include  [ \t\f]+ ['\"] ([^'\"]+) ['\"] )",
+    re.MULTILINE | re.VERBOSE)
+dependency_after_from_regex = re.compile(
+    r"(?:^ [ \t\f]+ \( ([\w., \t\f]*) \) [ \t\f]* [#\n]) |"
+    r"(?:^ [ \t\f]+    ([\w., \t\f]*)    [ \t\f]* [#\n])",
+    re.MULTILINE | re.VERBOSE)
+
+
+def normalize_existing(base_path, rel_paths):
+    return normalize_existing0(os.path.dirname(base_path), tuple(set(rel_paths)))
+
+
+@cached_function
+def normalize_existing0(base_dir, rel_paths):
+    """
+    Given some base directory ``base_dir`` and a list of path names
+    ``rel_paths``, normalize each relative path name ``rel`` by
+    replacing it by ``os.path.join(base, rel)`` if that file exists.
+
+    Return a couple ``(normalized, needed_base)`` where ``normalized``
+    if the list of normalized file names and ``needed_base`` is
+    ``base_dir`` if we actually needed ``base_dir``. If no paths were
+    changed (for example, if all paths were already absolute), then
+    ``needed_base`` is ``None``.
+    """
+    normalized = []
+    needed_base = None
+    for rel in rel_paths:
+        if os.path.isabs(rel):
+            normalized.append(rel)
+            continue
+        path = join_path(base_dir, rel)
+        if path_exists(path):
+            normalized.append(os.path.normpath(path))
+            needed_base = base_dir
+        else:
+            normalized.append(rel)
+    return (normalized, needed_base)
+
+
+def resolve_depends(depends, include_dirs):
+    include_dirs = tuple(include_dirs)
+    resolved = []
+    for depend in depends:
+        path = resolve_depend(depend, include_dirs)
+        if path is not None:
+            resolved.append(path)
+    return resolved
+
+
+@cached_function
+def resolve_depend(depend, include_dirs):
+    if depend[0] == '<' and depend[-1] == '>':
+        return None
+    for dir in include_dirs:
+        path = join_path(dir, depend)
+        if path_exists(path):
+            return os.path.normpath(path)
+    return None
+
+
+@cached_function
+def package(filename):
+    dir = os.path.dirname(os.path.abspath(str(filename)))
+    if dir != filename and is_package_dir(dir):
+        return package(dir) + (os.path.basename(dir),)
+    else:
+        return ()
+
+
+@cached_function
+def fully_qualified_name(filename):
+    module = os.path.splitext(os.path.basename(filename))[0]
+    return '.'.join(package(filename) + (module,))
+
+
+@cached_function
+def parse_dependencies(source_filename):
+    # Actual parsing is way too slow, so we use regular expressions.
+    # The only catch is that we must strip comments and string
+    # literals ahead of time.
+    with Utils.open_source_file(source_filename, error_handling='ignore') as fh:
+        source = fh.read()
+    distutils_info = DistutilsInfo(source)
+    source, literals = strip_string_literals(source)
+    source = source.replace('\\\n', ' ').replace('\t', ' ')
+
+    # TODO: pure mode
+    cimports = []
+    includes = []
+    externs  = []
+    for m in dependency_regex.finditer(source):
+        pycimports_from, cimport_from, pycimports_list, cimport_list, extern, include = m.groups()
+        if pycimports_from:
+            cimport_from = pycimports_from
+        if pycimports_list:
+            cimport_list = pycimports_list
+
+        if cimport_from:
+            cimports.append(cimport_from)
+            m_after_from = dependency_after_from_regex.search(source, pos=m.end())
+            if m_after_from:
+                multiline, one_line = m_after_from.groups()
+                subimports = multiline or one_line
+                cimports.extend("{}.{}".format(cimport_from, s.strip())
+                                for s in subimports.split(','))
+
+        elif cimport_list:
+            cimports.extend(x.strip() for x in cimport_list.split(","))
+        elif extern:
+            externs.append(literals[extern])
+        else:
+            includes.append(literals[include])
+    return cimports, includes, externs, distutils_info
+
+
+class DependencyTree:
+
+    def __init__(self, context, quiet=False):
+        self.context = context
+        self.quiet = quiet
+        self._transitive_cache = {}
+
+    def parse_dependencies(self, source_filename):
+        if path_exists(source_filename):
+            source_filename = os.path.normpath(source_filename)
+        return parse_dependencies(source_filename)
+
+    @cached_method
+    def included_files(self, filename):
+        # This is messy because included files are textually included, resolving
+        # cimports (but not includes) relative to the including file.
+        all = set()
+        for include in self.parse_dependencies(filename)[1]:
+            include_path = join_path(os.path.dirname(filename), include)
+            if not path_exists(include_path):
+                include_path = self.context.find_include_file(include, source_file_path=filename)
+            if include_path:
+                if '.' + os.path.sep in include_path:
+                    include_path = os.path.normpath(include_path)
+                all.add(include_path)
+                all.update(self.included_files(include_path))
+            elif not self.quiet:
+                print("Unable to locate '%s' referenced from '%s'" % (filename, include))
+        return all
+
+    @cached_method
+    def cimports_externs_incdirs(self, filename):
+        # This is really ugly. Nested cimports are resolved with respect to the
+        # includer, but includes are resolved with respect to the includee.
+        cimports, includes, externs = self.parse_dependencies(filename)[:3]
+        cimports = set(cimports)
+        externs = set(externs)
+        incdirs = set()
+        for include in self.included_files(filename):
+            included_cimports, included_externs, included_incdirs = self.cimports_externs_incdirs(include)
+            cimports.update(included_cimports)
+            externs.update(included_externs)
+            incdirs.update(included_incdirs)
+        externs, incdir = normalize_existing(filename, externs)
+        if incdir:
+            incdirs.add(incdir)
+        return tuple(cimports), externs, incdirs
+
+    def cimports(self, filename):
+        return self.cimports_externs_incdirs(filename)[0]
+
+    def package(self, filename):
+        return package(filename)
+
+    def fully_qualified_name(self, filename):
+        return fully_qualified_name(filename)
+
+    @cached_method
+    def find_pxd(self, module, filename=None):
+        is_relative = module[0] == '.'
+        if is_relative and not filename:
+            raise NotImplementedError("New relative imports.")
+        if filename is not None:
+            module_path = module.split('.')
+            if is_relative:
+                module_path.pop(0)  # just explicitly relative
+            package_path = list(self.package(filename))
+            while module_path and not module_path[0]:
+                try:
+                    package_path.pop()
+                except IndexError:
+                    return None   # FIXME: error?
+                module_path.pop(0)
+            relative = '.'.join(package_path + module_path)
+            pxd = self.context.find_pxd_file(relative, source_file_path=filename)
+            if pxd:
+                return pxd
+        if is_relative:
+            return None   # FIXME: error?
+        return self.context.find_pxd_file(module, source_file_path=filename)
+
+    @cached_method
+    def cimported_files(self, filename):
+        filename_root, filename_ext = os.path.splitext(filename)
+        if filename_ext in ('.pyx', '.py') and path_exists(filename_root + '.pxd'):
+            pxd_list = [filename_root + '.pxd']
+        else:
+            pxd_list = []
+        # Cimports generates all possible combinations package.module
+        # when imported as from package cimport module.
+        for module in self.cimports(filename):
+            if module[:7] == 'cython.' or module == 'cython':
+                continue
+            pxd_file = self.find_pxd(module, filename)
+            if pxd_file is not None:
+                pxd_list.append(pxd_file)
+        return tuple(pxd_list)
+
+    @cached_method
+    def immediate_dependencies(self, filename):
+        all_deps = {filename}
+        all_deps.update(self.cimported_files(filename))
+        all_deps.update(self.included_files(filename))
+        return all_deps
+
+    def all_dependencies(self, filename):
+        return self.transitive_merge(filename, self.immediate_dependencies, set.union)
+
+    @cached_method
+    def timestamp(self, filename):
+        return os.path.getmtime(filename)
+
+    def extract_timestamp(self, filename):
+        return self.timestamp(filename), filename
+
+    def newest_dependency(self, filename):
+        return max([self.extract_timestamp(f) for f in self.all_dependencies(filename)])
+
+    def distutils_info0(self, filename):
+        info = self.parse_dependencies(filename)[3]
+        kwds = info.values
+        cimports, externs, incdirs = self.cimports_externs_incdirs(filename)
+        basedir = os.getcwd()
+        # Add dependencies on "cdef extern from ..." files
+        if externs:
+            externs = _make_relative(externs, basedir)
+            if 'depends' in kwds:
+                kwds['depends'] = list(set(kwds['depends']).union(externs))
+            else:
+                kwds['depends'] = list(externs)
+        # Add include_dirs to ensure that the C compiler will find the
+        # "cdef extern from ..." files
+        if incdirs:
+            include_dirs = list(kwds.get('include_dirs', []))
+            for inc in _make_relative(incdirs, basedir):
+                if inc not in include_dirs:
+                    include_dirs.append(inc)
+            kwds['include_dirs'] = include_dirs
+        return info
+
+    def distutils_info(self, filename, aliases=None, base=None):
+        return (self.transitive_merge(filename, self.distutils_info0, DistutilsInfo.merge)
+            .subs(aliases)
+            .merge(base))
+
+    def transitive_merge(self, node, extract, merge):
+        try:
+            seen = self._transitive_cache[extract, merge]
+        except KeyError:
+            seen = self._transitive_cache[extract, merge] = {}
+        return self.transitive_merge_helper(
+            node, extract, merge, seen, {}, self.cimported_files)[0]
+
+    def transitive_merge_helper(self, node, extract, merge, seen, stack, outgoing):
+        if node in seen:
+            return seen[node], None
+        deps = extract(node)
+        if node in stack:
+            return deps, node
+        try:
+            stack[node] = len(stack)
+            loop = None
+            for next in outgoing(node):
+                sub_deps, sub_loop = self.transitive_merge_helper(next, extract, merge, seen, stack, outgoing)
+                if sub_loop is not None:
+                    if loop is not None and stack[loop] < stack[sub_loop]:
+                        pass
+                    else:
+                        loop = sub_loop
+                deps = merge(deps, sub_deps)
+            if loop == node:
+                loop = None
+            if loop is None:
+                seen[node] = deps
+            return deps, loop
+        finally:
+            del stack[node]
+
+
+_dep_tree = None
+
+def create_dependency_tree(ctx=None, quiet=False):
+    global _dep_tree
+    if _dep_tree is None:
+        if ctx is None:
+            ctx = Context(["."], get_directive_defaults(),
+                          options=CompilationOptions(default_options))
+        _dep_tree = DependencyTree(ctx, quiet=quiet)
+    return _dep_tree
+
+
+# If this changes, change also docs/src/reference/compilation.rst
+# which mentions this function
+def default_create_extension(template, kwds):
+    if 'depends' in kwds:
+        include_dirs = kwds.get('include_dirs', []) + ["."]
+        depends = resolve_depends(kwds['depends'], include_dirs)
+        kwds['depends'] = sorted(set(depends + template.depends))
+
+    t = template.__class__
+    ext = t(**kwds)
+    if hasattr(template, "py_limited_api"):
+        ext.py_limited_api = template.py_limited_api
+    metadata = dict(distutils=kwds, module_name=kwds['name'])
+    return (ext, metadata)
+
+
+# This may be useful for advanced users?
+def create_extension_list(patterns, exclude=None, ctx=None, aliases=None, quiet=False, language=None,
+                          exclude_failures=False):
+    if language is not None:
+        print('Warning: passing language={0!r} to cythonize() is deprecated. '
+              'Instead, put "# distutils: language={0}" in your .pyx or .pxd file(s)'.format(language))
+    if exclude is None:
+        exclude = []
+    if patterns is None:
+        return [], {}
+    elif isinstance(patterns, str) or not isinstance(patterns, Iterable):
+        patterns = [patterns]
+
+    from distutils.extension import Extension
+    if 'setuptools' in sys.modules:
+        # Support setuptools Extension instances as well.
+        extension_classes = (
+            Extension,  # should normally be the same as 'setuptools.extension._Extension'
+            sys.modules['setuptools.extension']._Extension,
+            sys.modules['setuptools'].Extension,
+        )
+    else:
+        extension_classes = (Extension,)
+
+    explicit_modules = {m.name for m in patterns if isinstance(m, extension_classes)}
+    deps = create_dependency_tree(ctx, quiet=quiet)
+    shared_utility_qualified_name = ctx.shared_utility_qualified_name
+
+    to_exclude = set()
+    if not isinstance(exclude, list):
+        exclude = [exclude]
+    for pattern in exclude:
+        to_exclude.update(map(os.path.abspath, extended_iglob(pattern)))
+
+    module_list = []
+    module_metadata = {}
+
+    # if no create_extension() function is defined, use a simple
+    # default function.
+    create_extension = ctx.options.create_extension or default_create_extension
+
+    seen = set()
+    for pattern in patterns:
+        if isinstance(pattern, str):
+            filepattern = pattern
+            template = Extension(pattern, [])  # Fake Extension without sources
+            name = '*'
+            base = None
+            ext_language = language
+        elif isinstance(pattern, extension_classes):
+            cython_sources = [s for s in pattern.sources
+                              if os.path.splitext(s)[1] in ('.py', '.pyx')]
+            if cython_sources:
+                filepattern = cython_sources[0]
+                if len(cython_sources) > 1:
+                    print("Warning: Multiple cython sources found for extension '%s': %s\n"
+                          "See https://cython.readthedocs.io/en/latest/src/userguide/sharing_declarations.html "
+                          "for sharing declarations among Cython files." % (pattern.name, cython_sources))
+            elif shared_utility_qualified_name and pattern.name == shared_utility_qualified_name:
+                # This is the shared utility code file.
+                m, _ = create_extension(pattern, dict(
+                    name=shared_utility_qualified_name,
+                    sources=pattern.sources or [
+                        shared_utility_qualified_name.replace('.', os.sep) + ('.cpp' if pattern.language == 'c++' else '.c')],
+                    language=pattern.language,
+                ))
+                m.np_pythran = False
+                m.shared_utility_qualified_name = None
+                module_list.append(m)
+                continue
+            else:
+                # ignore non-cython modules
+                module_list.append(pattern)
+                continue
+            template = pattern
+            name = template.name
+            base = DistutilsInfo(exn=template)
+            ext_language = None  # do not override whatever the Extension says
+        else:
+            msg = str("pattern is not of type str nor subclass of Extension (%s)"
+                      " but of type %s and class %s" % (repr(Extension),
+                                                        type(pattern),
+                                                        pattern.__class__))
+            raise TypeError(msg)
+
+        for file in nonempty(sorted(extended_iglob(filepattern)), "'%s' doesn't match any files" % filepattern):
+            if os.path.abspath(file) in to_exclude:
+                continue
+            module_name = deps.fully_qualified_name(file)
+            if '*' in name:
+                if module_name in explicit_modules:
+                    continue
+            elif name:
+                module_name = name
+
+            Utils.raise_error_if_module_name_forbidden(module_name)
+
+            if module_name not in seen:
+                try:
+                    kwds = deps.distutils_info(file, aliases, base).values
+                except Exception:
+                    if exclude_failures:
+                        continue
+                    raise
+                if base is not None:
+                    for key, value in base.values.items():
+                        if key not in kwds:
+                            kwds[key] = value
+
+                kwds['name'] = module_name
+
+                sources = [file] + [m for m in template.sources if m != filepattern]
+                if 'sources' in kwds:
+                    # allow users to add .c files etc.
+                    for source in kwds['sources']:
+                        if source not in sources:
+                            sources.append(source)
+                kwds['sources'] = sources
+
+                if ext_language and 'language' not in kwds:
+                    kwds['language'] = ext_language
+
+                np_pythran = kwds.pop('np_pythran', False)
+
+                # Create the new extension
+                m, metadata = create_extension(template, kwds)
+                m.np_pythran = np_pythran or getattr(m, 'np_pythran', False)
+                m.shared_utility_qualified_name = shared_utility_qualified_name
+                if m.np_pythran:
+                    update_pythran_extension(m)
+                module_list.append(m)
+
+                # Store metadata (this will be written as JSON in the
+                # generated C file but otherwise has no purpose)
+                module_metadata[module_name] = metadata
+
+                if file not in m.sources:
+                    # Old setuptools unconditionally replaces .pyx with .c/.cpp
+                    target_file = os.path.splitext(file)[0] + ('.cpp' if m.language == 'c++' else '.c')
+                    try:
+                        m.sources.remove(target_file)
+                    except ValueError:
+                        # never seen this in the wild, but probably better to warn about this unexpected case
+                        print("Warning: Cython source file not found in sources list, adding %s" % file)
+                    m.sources.insert(0, file)
+                seen.add(name)
+    return module_list, module_metadata
+
+
+# This is the user-exposed entry point.
+def cythonize(module_list, exclude=None, nthreads=0, aliases=None, quiet=False, force=None, language=None,
+              exclude_failures=False, show_all_warnings=False, **options):
+    """
+    Compile a set of source modules into C/C++ files and return a list of distutils
+    Extension objects for them.
+
+    :param module_list: As module list, pass either a glob pattern, a list of glob
+                        patterns or a list of Extension objects.  The latter
+                        allows you to configure the extensions separately
+                        through the normal distutils options.
+                        You can also pass Extension objects that have
+                        glob patterns as their sources. Then, cythonize
+                        will resolve the pattern and create a
+                        copy of the Extension for every matching file.
+
+    :param exclude: When passing glob patterns as ``module_list``, you can exclude certain
+                    module names explicitly by passing them into the ``exclude`` option.
+
+    :param nthreads: The number of concurrent builds for parallel compilation
+                     (requires the ``multiprocessing`` module).
+
+    :param aliases: If you want to use compiler directives like ``# distutils: ...`` but
+                    can only know at compile time (when running the ``setup.py``) which values
+                    to use, you can use aliases and pass a dictionary mapping those aliases
+                    to Python strings when calling :func:`cythonize`. As an example, say you
+                    want to use the compiler
+                    directive ``# distutils: include_dirs = ../static_libs/include/``
+                    but this path isn't always fixed and you want to find it when running
+                    the ``setup.py``. You can then do ``# distutils: include_dirs = MY_HEADERS``,
+                    find the value of ``MY_HEADERS`` in the ``setup.py``, put it in a python
+                    variable called ``foo`` as a string, and then call
+                    ``cythonize(..., aliases={'MY_HEADERS': foo})``.
+
+    :param quiet: If True, Cython won't print error, warning, or status messages during the
+                  compilation.
+
+    :param force: Forces the recompilation of the Cython modules, even if the timestamps
+                  don't indicate that a recompilation is necessary.
+
+    :param language: To globally enable C++ mode, you can pass ``language='c++'``. Otherwise, this
+                     will be determined at a per-file level based on compiler directives.  This
+                     affects only modules found based on file names.  Extension instances passed
+                     into :func:`cythonize` will not be changed. It is recommended to rather
+                     use the compiler directive ``# distutils: language = c++`` than this option.
+
+    :param exclude_failures: For a broad 'try to compile' mode that ignores compilation
+                             failures and simply excludes the failed extensions,
+                             pass ``exclude_failures=True``. Note that this only
+                             really makes sense for compiling ``.py`` files which can also
+                             be used without compilation.
+
+    :param show_all_warnings: By default, not all Cython warnings are printed.
+                              Set to true to show all warnings.
+
+    :param annotate: If ``True``, will produce a HTML file for each of the ``.pyx`` or ``.py``
+                     files compiled. The HTML file gives an indication
+                     of how much Python interaction there is in
+                     each of the source code lines, compared to plain C code.
+                     It also allows you to see the C/C++ code
+                     generated for each line of Cython code. This report is invaluable when
+                     optimizing a function for speed,
+                     and for determining when to :ref:`release the GIL <nogil>`:
+                     in general, a ``nogil`` block may contain only "white" code.
+                     See examples in :ref:`determining_where_to_add_types` or
+                     :ref:`primes`.
+
+
+    :param annotate-fullc: If ``True`` will produce a colorized HTML version of
+                           the source which includes entire generated C/C++-code.
+
+
+    :param compiler_directives: Allow to set compiler directives in the ``setup.py`` like this:
+                                ``compiler_directives={'embedsignature': True}``.
+                                See :ref:`compiler-directives`.
+
+    :param depfile: produce depfiles for the sources if True.
+    :param cache: If ``True`` the cache enabled with default path. If the value is a path to a directory,
+                  then the directory is used to cache generated ``.c``/``.cpp`` files. By default cache is disabled.
+                  See :ref:`cython-cache`.
+    """
+    if exclude is None:
+        exclude = []
+    if 'include_path' not in options:
+        options['include_path'] = ['.']
+    if 'common_utility_include_dir' in options:
+        safe_makedirs(options['common_utility_include_dir'])
+
+    depfile = options.pop('depfile', None)
+
+    if pythran is None:
+        pythran_options = None
+    else:
+        pythran_options = CompilationOptions(**options)
+        pythran_options.cplus = True
+        pythran_options.np_pythran = True
+
+    if force is None:
+        force = os.environ.get("CYTHON_FORCE_REGEN") == "1"  # allow global overrides for build systems
+
+    c_options = CompilationOptions(**options)
+    cpp_options = CompilationOptions(**options); cpp_options.cplus = True
+    ctx = Context.from_options(c_options)
+    options = c_options
+    shared_utility_qualified_name = ctx.shared_utility_qualified_name
+    module_list, module_metadata = create_extension_list(
+        module_list,
+        exclude=exclude,
+        ctx=ctx,
+        quiet=quiet,
+        exclude_failures=exclude_failures,
+        language=language,
+        aliases=aliases)
+
+    fix_windows_unicode_modules(module_list)
+
+    deps = create_dependency_tree(ctx, quiet=quiet)
+    build_dir = getattr(options, 'build_dir', None)
+    if options.cache and not (options.annotate or Options.annotate):
+        # cache is enabled when:
+        # * options.cache is True (the default path to the cache base dir is used)
+        # * options.cache is the explicit path to the cache base dir
+        # * annotations are not generated
+        cache_path = None if options.cache is True else options.cache
+        cache = Cache(cache_path, getattr(options, 'cache_size', None))
+    else:
+        cache = None
+
+    def copy_to_build_dir(filepath, root=os.getcwd()):
+        filepath_abs = os.path.abspath(filepath)
+        if os.path.isabs(filepath):
+            filepath = filepath_abs
+        if filepath_abs.startswith(root):
+            # distutil extension depends are relative to cwd
+            mod_dir = join_path(build_dir,
+                                os.path.dirname(_relpath(filepath, root)))
+            copy_once_if_newer(filepath_abs, mod_dir)
+
+    def file_in_build_dir(c_file):
+        if not build_dir:
+            return c_file
+        if os.path.isabs(c_file):
+            c_file = os.path.splitdrive(c_file)[1]
+            c_file = c_file.split(os.sep, 1)[1]
+        c_file = os.path.join(build_dir, c_file)
+        dir = os.path.dirname(c_file)
+        safe_makedirs_once(dir)
+        return c_file
+
+    modules_by_cfile = collections.defaultdict(list)
+    to_compile = []
+    for m in module_list:
+        if build_dir:
+            for dep in m.depends:
+                copy_to_build_dir(dep)
+
+        cy_sources = [
+            source for source in m.sources
+            if os.path.splitext(source)[1] in ('.pyx', '.py')]
+        if len(cy_sources) == 1:
+            # normal "special" case: believe the Extension module name to allow user overrides
+            full_module_name = m.name
+        else:
+            # infer FQMN from source files
+            full_module_name = None
+
+        np_pythran = getattr(m, 'np_pythran', False)
+        py_limited_api = getattr(m, 'py_limited_api', False)
+
+        if np_pythran:
+            options = pythran_options
+        elif m.language == 'c++':
+            options = cpp_options
+        else:
+            options = c_options
+
+        new_sources = []
+        for source in m.sources:
+            base, ext = os.path.splitext(source)
+            if ext in ('.pyx', '.py'):
+                c_file = base + ('.cpp' if m.language == 'c++' or np_pythran else '.c')
+
+                # setup for out of place build directory if enabled
+                c_file = file_in_build_dir(c_file)
+
+                # write out the depfile, if requested
+                if depfile:
+                    dependencies = deps.all_dependencies(source)
+                    write_depfile(c_file, source, dependencies)
+
+                # Missing files and those generated by other Cython versions should always be recreated.
+                if Utils.file_generated_by_this_cython(c_file):
+                    c_timestamp = os.path.getmtime(c_file)
+                else:
+                    c_timestamp = -1
+
+                # Priority goes first to modified files, second to direct
+                # dependents, and finally to indirect dependents.
+                if c_timestamp < deps.timestamp(source):
+                    dep_timestamp, dep = deps.timestamp(source), source
+                    priority = 0
+                else:
+                    dep_timestamp, dep = deps.newest_dependency(source)
+                    priority = 2 - (dep in deps.immediate_dependencies(source))
+                if force or c_timestamp < dep_timestamp:
+                    if not quiet and not force:
+                        if source == dep:
+                            print("Compiling %s because it changed." % Utils.decode_filename(source))
+                        else:
+                            print("Compiling %s because it depends on %s." % (
+                                Utils.decode_filename(source),
+                                Utils.decode_filename(dep),
+                            ))
+                    if not force and cache:
+                        fingerprint = cache.transitive_fingerprint(
+                                source, deps.all_dependencies(source), options,
+                                FingerprintFlags(m.language or 'c', py_limited_api, np_pythran)
+                        )
+                    else:
+                        fingerprint = None
+                    to_compile.append((
+                        priority, source, c_file, fingerprint, quiet,
+                        options, not exclude_failures, module_metadata.get(m.name),
+                        full_module_name, show_all_warnings))
+                modules_by_cfile[c_file].append(m)
+            elif shared_utility_qualified_name and m.name == shared_utility_qualified_name:
+                # Generate shared utility code module now.
+                c_file = file_in_build_dir(source)
+                module_options = CompilationOptions(
+                    options, shared_c_file_path=c_file, shared_utility_qualified_name=None)
+                if not Utils.is_cython_generated_file(c_file):
+                    print(f"Warning: Shared module source file is not a Cython file - not creating '{m.name}' as '{c_file}'")
+                elif force or not Utils.file_generated_by_this_cython(c_file):
+                    from .SharedModule import generate_shared_module
+                    if not quiet:
+                        print(f"Generating shared module '{m.name}'")
+                    generate_shared_module(module_options)
+            else:
+                c_file = source
+                if build_dir:
+                    copy_to_build_dir(source)
+
+            new_sources.append(c_file)
+
+        m.sources = new_sources
+
+    to_compile.sort()
+    N = len(to_compile)
+
+    # Drop "priority" sorting component of "to_compile" entries
+    # and add a simple progress indicator and the remaining arguments.
+    build_progress_indicator = ("[{0:%d}/%d] " % (len(str(N)), N)).format
+    to_compile = [
+        task[1:] + (build_progress_indicator(i), cache)
+        for i, task in enumerate(to_compile, 1)
+    ]
+
+    if N <= 1:
+        nthreads = 0
+    try:
+        from concurrent.futures import ProcessPoolExecutor
+    except ImportError:
+        nthreads = 0
+
+    if nthreads:
+        with ProcessPoolExecutor(
+            max_workers=nthreads,
+            initializer=_init_multiprocessing_helper,
+        ) as proc_pool:
+            try:
+                list(proc_pool.map(cythonize_one_helper, to_compile, chunksize=1))
+            except KeyboardInterrupt:
+                proc_pool.terminate_workers()
+                proc_pool.shutdown(cancel_futures=True)
+                raise
+    else:
+        for args in to_compile:
+            cythonize_one(*args)
+
+    if exclude_failures:
+        failed_modules = set()
+        for c_file, modules in modules_by_cfile.items():
+            if not os.path.exists(c_file):
+                failed_modules.update(modules)
+            elif os.path.getsize(c_file) < 200:
+                f = open(c_file, 'r', encoding='iso8859-1')
+                try:
+                    if f.read(len('#error ')) == '#error ':
+                        # dead compilation result
+                        failed_modules.update(modules)
+                finally:
+                    f.close()
+        if failed_modules:
+            for module in failed_modules:
+                module_list.remove(module)
+            print("Failed compilations: %s" % ', '.join(sorted([
+                module.name for module in failed_modules])))
+
+    if cache:
+        cache.cleanup_cache()
+
+    # cythonize() is often followed by the (non-Python-buffered)
+    # compiler output, flush now to avoid interleaving output.
+    sys.stdout.flush()
+    return module_list
+
+
+def fix_windows_unicode_modules(module_list):
+    # Hack around a distutils 3.[5678] bug on Windows for unicode module names.
+    # https://bugs.python.org/issue39432
+    if sys.platform != "win32":
+        return
+    if sys.version_info >= (3, 8, 2):
+        return
+
+    def make_filtered_list(ignored_symbol, old_entries):
+        class FilteredExportSymbols(list):
+            # export_symbols for unicode filename cause link errors on Windows
+            # Cython doesn't need them (it already defines PyInit with the correct linkage)
+            # so use this class as a temporary fix to stop them from being generated
+            def __contains__(self, val):
+                # so distutils doesn't "helpfully" add PyInit_<name>
+                return val == ignored_symbol or list.__contains__(self, val)
+
+        filtered_list = FilteredExportSymbols(old_entries)
+        if old_entries:
+            filtered_list.extend(name for name in old_entries if name != ignored_symbol)
+        return filtered_list
+
+    for m in module_list:
+        if m.name.isascii():
+            continue
+        m.export_symbols = make_filtered_list(
+            "PyInit_" + m.name.rsplit(".", 1)[-1],
+            m.export_symbols,
+        )
+
+
+if os.environ.get('XML_RESULTS'):
+    compile_result_dir = os.environ['XML_RESULTS']
+    def record_results(func):
+        def with_record(*args):
+            t = time.time()
+            success = True
+            try:
+                try:
+                    func(*args)
+                except:
+                    success = False
+            finally:
+                t = time.time() - t
+                module = fully_qualified_name(args[0])
+                name = "cythonize." + module
+                failures = 1 - success
+                if success:
+                    failure_item = ""
+                else:
+                    failure_item = "failure"
+                output = open(os.path.join(compile_result_dir, name + ".xml"), "w")
+                output.write("""
+                    <?xml version="1.0" ?>
+                    <testsuite name="%(name)s" errors="0" failures="%(failures)s" tests="1" time="%(t)s">
+                    <testcase classname="%(name)s" name="cythonize">
+                    %(failure_item)s
+                    </testcase>
+                    </testsuite>
+                """.strip() % locals())
+                output.close()
+        return with_record
+else:
+    def record_results(func):
+        return func
+
+
+# TODO: Share context? Issue: pyx processing leaks into pxd module
+@record_results
+def cythonize_one(pyx_file, c_file,
+                  fingerprint=None, quiet=False, options=None,
+                  raise_on_failure=True, embedded_metadata=None,
+                  full_module_name=None, show_all_warnings=False,
+                  progress="", cache=None):
+    from ..Compiler.Main import compile_single, default_options
+    from ..Compiler.Errors import CompileError, PyrexError
+
+    if not quiet:
+        if cache and fingerprint and cache.lookup_cache(c_file, fingerprint):
+            print(f"{progress}Found compiled {pyx_file} in cache")
+        else:
+            print(f"{progress}Cythonizing {Utils.decode_filename(pyx_file)}")
+    if options is None:
+        options = CompilationOptions(default_options)
+    options.output_file = c_file
+    options.embedded_metadata = embedded_metadata
+
+    old_warning_level = Errors.LEVEL
+    if show_all_warnings:
+        Errors.LEVEL = 0
+
+    any_failures = 0
+    try:
+        result = compile_single(pyx_file, options, full_module_name=full_module_name, cache=cache, fingerprint=fingerprint)
+        if result.num_errors > 0:
+            any_failures = 1
+    except (OSError, PyrexError) as e:
+        sys.stderr.write('%s\n' % e)
+        any_failures = 1
+        # XXX
+        import traceback
+        traceback.print_exc()
+    except Exception:
+        if raise_on_failure:
+            raise
+        import traceback
+        traceback.print_exc()
+        any_failures = 1
+    finally:
+        if show_all_warnings:
+            Errors.LEVEL = old_warning_level
+
+    if any_failures:
+        if raise_on_failure:
+            raise CompileError(None, pyx_file)
+        elif os.path.exists(c_file):
+            os.remove(c_file)
+
+
+def cythonize_one_helper(m):
+    import traceback
+    try:
+        return cythonize_one(*m)
+    except Exception:
+        traceback.print_exc()
+        raise
+
+
+def _init_multiprocessing_helper():
+    # KeyboardInterrupt kills workers, so don't let them get it
+    import signal
+    signal.signal(signal.SIGINT, signal.SIG_IGN)

venv/lib/python3.10/site-packages/Cython/Build/Distutils.py

@@ -0,0 +1 @@
+from Cython.Distutils.build_ext import build_ext

venv/lib/python3.10/site-packages/Cython/Build/Inline.py

@@ -0,0 +1,463 @@
+import gc
+import hashlib
+import inspect
+import os
+import re
+import sys
+import time
+
+from distutils.core import Distribution, Extension
+from distutils.command.build_ext import build_ext
+
+import Cython
+from ..Compiler.Main import Context
+from ..Compiler.Options import (default_options, CompilationOptions,
+    get_directive_defaults)
+
+from ..Compiler.Visitor import CythonTransform, EnvTransform
+from ..Compiler.ParseTreeTransforms import SkipDeclarations
+from ..Compiler.TreeFragment import parse_from_strings
+from .Dependencies import strip_string_literals, cythonize, cached_function
+from .Cache import get_cython_cache_dir
+from ..Compiler import Pipeline
+import cython as cython_module
+
+import importlib.util
+from importlib.machinery import ExtensionFileLoader
+
+def load_dynamic(name, path):
+    spec = importlib.util.spec_from_file_location(name, loader=ExtensionFileLoader(name, path))
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+class UnboundSymbols(EnvTransform, SkipDeclarations):
+    def __init__(self):
+        super(EnvTransform, self).__init__(context=None)
+        self.unbound = set()
+    def visit_NameNode(self, node):
+        if not self.current_env().lookup(node.name):
+            self.unbound.add(node.name)
+        return node
+    def __call__(self, node):
+        super().__call__(node)
+        return self.unbound
+
+
+@cached_function
+def unbound_symbols(code, context=None):
+    if context is None:
+        context = Context([], get_directive_defaults(),
+                          options=CompilationOptions(default_options))
+    from ..Compiler.ParseTreeTransforms import AnalyseDeclarationsTransform
+    tree = parse_from_strings('(tree fragment)', code)
+    for phase in Pipeline.create_pipeline(context, 'pyx'):
+        if phase is None:
+            continue
+        tree = phase(tree)
+        if isinstance(phase, AnalyseDeclarationsTransform):
+            break
+    import builtins
+    return tuple(UnboundSymbols()(tree) - set(dir(builtins)))
+
+
+def unsafe_type(arg, context=None):
+    py_type = type(arg)
+    if py_type is int:
+        return 'long'
+    else:
+        return safe_type(arg, context)
+
+
+def safe_type(arg, context=None):
+    py_type = type(arg)
+    if py_type in (list, tuple, dict, str):
+        return py_type.__name__
+    elif py_type is complex:
+        return 'double complex'
+    elif py_type is float:
+        return 'double'
+    elif py_type is bool:
+        return 'bint'
+    elif 'numpy' in sys.modules and isinstance(arg, sys.modules['numpy'].ndarray):
+        return 'numpy.ndarray[numpy.%s_t, ndim=%s]' % (arg.dtype.name, arg.ndim)
+    else:
+        for base_type in py_type.__mro__:
+            if base_type.__module__ in ('__builtin__', 'builtins'):
+                return 'object'
+            module = context.find_module(base_type.__module__, need_pxd=False)
+            if module:
+                entry = module.lookup(base_type.__name__)
+                if entry.is_type:
+                    return '%s.%s' % (base_type.__module__, base_type.__name__)
+        return 'object'
+
+
+def _get_build_extension():
+    dist = Distribution()
+    # Ensure the build respects distutils configuration by parsing
+    # the configuration files
+    config_files = dist.find_config_files()
+    dist.parse_config_files(config_files)
+    build_extension = build_ext(dist)
+    build_extension.finalize_options()
+    return build_extension
+
+
+@cached_function
+def _create_context(cython_include_dirs):
+    return Context(
+        list(cython_include_dirs),
+        get_directive_defaults(),
+        options=CompilationOptions(default_options)
+    )
+
+
+_cython_inline_cache = {}
+_cython_inline_default_context = _create_context(('.',))
+
+
+def _populate_unbound(kwds, unbound_symbols, locals=None, globals=None):
+    for symbol in unbound_symbols:
+        if symbol not in kwds:
+            if locals is None or globals is None:
+                calling_frame = inspect.currentframe().f_back.f_back.f_back
+                if locals is None:
+                    locals = calling_frame.f_locals
+                if globals is None:
+                    globals = calling_frame.f_globals
+            if not isinstance(locals, dict):
+                # FrameLocalsProxy is stricter than dict on how it looks up keys
+                # and this means our "EncodedStrings" don't match the keys in locals.
+                # Therefore copy to a dict.
+                locals = dict(locals)
+            if symbol in locals:
+                kwds[symbol] = locals[symbol]
+            elif symbol in globals:
+                kwds[symbol] = globals[symbol]
+            else:
+                print("Couldn't find %r" % symbol)
+
+
+def _inline_key(orig_code, arg_sigs, language_level):
+    key = orig_code, arg_sigs, sys.version_info, sys.executable, language_level, Cython.__version__
+    return hashlib.sha256(str(key).encode('utf-8')).hexdigest()
+
+
+def cython_inline(code, get_type=unsafe_type,
+                  lib_dir=os.path.join(get_cython_cache_dir(), 'inline'),
+                  cython_include_dirs=None, cython_compiler_directives=None,
+                  force=False, quiet=False, locals=None, globals=None, language_level=None, **kwds):
+
+    if get_type is None:
+        get_type = lambda x: 'object'
+    ctx = _create_context(tuple(cython_include_dirs)) if cython_include_dirs else _cython_inline_default_context
+
+    cython_compiler_directives = dict(cython_compiler_directives) if cython_compiler_directives else {}
+    if language_level is None and 'language_level' not in cython_compiler_directives:
+        language_level = '3'
+    if language_level is not None:
+        cython_compiler_directives['language_level'] = language_level
+
+    key_hash = None
+
+    # Fast path if this has been called in this session.
+    _unbound_symbols = _cython_inline_cache.get(code)
+    if _unbound_symbols is not None:
+        _populate_unbound(kwds, _unbound_symbols, locals, globals)
+        args = sorted(kwds.items())
+        arg_sigs = tuple([(get_type(value, ctx), arg) for arg, value in args])
+        key_hash = _inline_key(code, arg_sigs, language_level)
+        invoke = _cython_inline_cache.get((code, arg_sigs, key_hash))
+        if invoke is not None:
+            arg_list = [arg[1] for arg in args]
+            return invoke(*arg_list)
+
+    orig_code = code
+    code, literals = strip_string_literals(code)
+    code = strip_common_indent(code)
+    if locals is None:
+        locals = inspect.currentframe().f_back.f_back.f_locals
+    if globals is None:
+        globals = inspect.currentframe().f_back.f_back.f_globals
+    try:
+        _cython_inline_cache[orig_code] = _unbound_symbols = unbound_symbols(code)
+        _populate_unbound(kwds, _unbound_symbols, locals, globals)
+    except AssertionError:
+        if not quiet:
+            # Parsing from strings not fully supported (e.g. cimports).
+            print("Could not parse code as a string (to extract unbound symbols).")
+
+    cimports = []
+    for name, arg in list(kwds.items()):
+        if arg is cython_module:
+            cimports.append('\ncimport cython as %s' % name)
+            del kwds[name]
+    arg_names = sorted(kwds)
+    arg_sigs = tuple([(get_type(kwds[arg], ctx), arg) for arg in arg_names])
+    if key_hash is None:
+        key_hash = _inline_key(orig_code, arg_sigs, language_level)
+    module_name = "_cython_inline_" + key_hash
+
+    if module_name in sys.modules:
+        module = sys.modules[module_name]
+
+    else:
+        build_extension = None
+        if cython_inline.so_ext is None:
+            # Figure out and cache current extension suffix
+            build_extension = _get_build_extension()
+            cython_inline.so_ext = build_extension.get_ext_filename('')
+
+        lib_dir = os.path.abspath(lib_dir)
+        module_path = os.path.join(lib_dir, module_name + cython_inline.so_ext)
+
+        if not os.path.exists(lib_dir):
+            os.makedirs(lib_dir)
+        if force or not os.path.isfile(module_path):
+            cflags = []
+            define_macros = []
+            c_include_dirs = []
+            qualified = re.compile(r'([.\w]+)[.]')
+            for type, _ in arg_sigs:
+                m = qualified.match(type)
+                if m:
+                    cimports.append('\ncimport %s' % m.groups()[0])
+                    # one special case
+                    if m.groups()[0] == 'numpy':
+                        import numpy
+                        c_include_dirs.append(numpy.get_include())
+                        define_macros.append(("NPY_NO_DEPRECATED_API", "NPY_1_7_API_VERSION"))
+                        # cflags.append('-Wno-unused')
+            module_body, func_body = extract_func_code(code)
+            params = ', '.join(['%s %s' % a for a in arg_sigs])
+            module_code = """
+%(module_body)s
+%(cimports)s
+def __invoke(%(params)s):
+%(func_body)s
+    return locals()
+            """ % {'cimports': '\n'.join(cimports),
+                   'module_body': module_body,
+                   'params': params,
+                   'func_body': func_body }
+            for key, value in literals.items():
+                module_code = module_code.replace(key, value)
+            pyx_file = os.path.join(lib_dir, module_name + '.pyx')
+            fh = open(pyx_file, 'w')
+            try:
+                fh.write(module_code)
+            finally:
+                fh.close()
+            extension = Extension(
+                name=module_name,
+                sources=[pyx_file],
+                include_dirs=c_include_dirs or None,
+                extra_compile_args=cflags or None,
+                define_macros=define_macros or None,
+            )
+            if build_extension is None:
+                build_extension = _get_build_extension()
+            build_extension.extensions = cythonize(
+                [extension],
+                include_path=cython_include_dirs or ['.'],
+                compiler_directives=cython_compiler_directives,
+                quiet=quiet)
+            build_extension.build_temp = os.path.dirname(pyx_file)
+            build_extension.build_lib  = lib_dir
+            build_extension.run()
+
+        if sys.platform == 'win32' and sys.version_info >= (3, 8):
+            with os.add_dll_directory(os.path.abspath(lib_dir)):
+                module = load_dynamic(module_name, module_path)
+        else:
+            module = load_dynamic(module_name, module_path)
+
+    _cython_inline_cache[orig_code, arg_sigs, key_hash] = module.__invoke
+    arg_list = [kwds[arg] for arg in arg_names]
+    return module.__invoke(*arg_list)
+
+
+# The code template used for cymeit benchmark runs.
+# We keep the benchmark repetition separate from the benchmarked code
+# to prevent the C compiler from doing unhelpful loop optimisations.
+_CYMEIT_TEMPLATE = """
+def __PYX_repeat_benchmark(benchmark, timer, size_t number):
+    cdef size_t i
+
+    t0 = timer()
+    for i in range(number):
+        benchmark()
+    t1 = timer()
+    return t1 - t0
+
+def __PYX_make_benchmark():
+    {setup_code}
+
+    def __PYX_run_benchmark():
+        {benchmark_code}
+
+    return __PYX_run_benchmark
+"""
+
+
+def cymeit(code, setup_code=None, import_module=None, directives=None, timer=time.perf_counter, repeat=9):
+    """Benchmark a Cython code string similar to 'timeit'.
+
+    'setup_code': string of setup code that will be run before taking the timings.
+
+    'import_module': a module namespace to run the benchmark in
+                     (usually a compiled Cython module).
+
+    'directives': Cython directives to use when compiling the benchmark code.
+
+    'timer': The timer function. Defaults to 'time.perf_counter', returning float seconds.
+             Nanosecond timers are detected (and can only be used) if they return integers.
+
+    'repeat': The number of timings to take and return.
+
+    Returns a tuple: (list of single-loop timings, number of loops run for each)
+    """
+    import textwrap
+
+    # Compile the benchmark code as an inline closure function.
+
+    setup_code = strip_common_indent(setup_code) if setup_code else ''
+    code = strip_common_indent(code) if code.strip() else 'pass'
+
+    module_namespace = __import__(import_module).__dict__ if import_module else None
+
+    cymeit_code = _CYMEIT_TEMPLATE.format(
+        setup_code=textwrap.indent(setup_code, ' '*4).strip(),
+        benchmark_code=textwrap.indent(code, ' '*8).strip(),
+
+    )
+
+    namespace = cython_inline(
+        cymeit_code,
+        cython_compiler_directives=directives,
+        locals=module_namespace,
+    )
+
+    make_benchmark = namespace['__PYX_make_benchmark']
+    repeat_benchmark = namespace['__PYX_repeat_benchmark']
+
+    # Based on 'timeit' in CPython 3.13.
+
+    def timeit(number):
+        benchmark = make_benchmark()
+
+        gcold = gc.isenabled()
+        gc.disable()
+        try:
+            timing = repeat_benchmark(benchmark, timer, number)
+        finally:
+            if gcold:
+                gc.enable()
+        return timing
+
+    # Find a sufficiently large number of loops, warm up the system.
+
+    timer_returns_nanoseconds = isinstance(timer(), int)
+    one_second = 1_000_000_000 if timer_returns_nanoseconds else 1.0
+
+    # Run for at least 0.2 seconds, either as integer nanoseconds or floating point seconds.
+    min_runtime = one_second // 5 if timer_returns_nanoseconds else one_second / 5
+
+    def autorange():
+        i = 1
+        while True:
+            for j in 1, 2, 5:
+                number = i * j
+                time_taken = timeit(number)
+                assert isinstance(time_taken, int if timer_returns_nanoseconds else float)
+                if time_taken >= min_runtime:
+                    return number
+                elif timer_returns_nanoseconds and (time_taken < 10 and number >= 10):
+                    # Arbitrary sanity check to prevent endless loops for non-ns timers.
+                    raise RuntimeError(f"Timer seems to return non-ns timings: {timer}")
+            i *= 10
+
+    autorange()  # warmup
+    number = autorange()
+
+    # Run and repeat the benchmark.
+    timings = [
+        timeit(number)
+        for _ in range(repeat)
+    ]
+
+    half = number // 2  # for integer rounding
+
+    timings = [
+        (timing + half) // number if timer_returns_nanoseconds else timing / number
+        for timing in timings
+    ]
+
+    return (timings, number)
+
+
+# Cached suffix used by cython_inline above.  None should get
+# overridden with actual value upon the first cython_inline invocation
+cython_inline.so_ext = None
+
+_find_non_space = re.compile(r'\S').search
+
+
+def strip_common_indent(code):
+    min_indent = None
+    lines = code.splitlines()
+    for line in lines:
+        match = _find_non_space(line)
+        if not match:
+            continue  # blank
+        indent = match.start()
+        if line[indent] == '#':
+            continue  # comment
+        if min_indent is None or min_indent > indent:
+            min_indent = indent
+    for ix, line in enumerate(lines):
+        match = _find_non_space(line)
+        if not match or not line or line[indent:indent+1] == '#':
+            continue
+        lines[ix] = line[min_indent:]
+    return '\n'.join(lines)
+
+
+module_statement = re.compile(r'^((cdef +(extern|class))|cimport|(from .+ cimport)|(from .+ import +[*]))')
+def extract_func_code(code):
+    module = []
+    function = []
+    current = function
+    code = code.replace('\t', ' ')
+    lines = code.split('\n')
+    for line in lines:
+        if not line.startswith(' '):
+            if module_statement.match(line):
+                current = module
+            else:
+                current = function
+        current.append(line)
+    return '\n'.join(module), '    ' + '\n    '.join(function)
+
+
+def get_body(source):
+    ix = source.index(':')
+    if source[:5] == 'lambda':
+        return "return %s" % source[ix+1:]
+    else:
+        return source[ix+1:]
+
+
+# Lots to be done here... It would be especially cool if compiled functions
+# could invoke each other quickly.
+class RuntimeCompiledFunction:
+
+    def __init__(self, f):
+        self._f = f
+        self._body = get_body(inspect.getsource(f))
+
+    def __call__(self, *args, **kwds):
+        all = inspect.getcallargs(self._f, *args, **kwds)
+        return cython_inline(self._body, locals=self._f.__globals__, globals=self._f.__globals__, **all)

venv/lib/python3.10/site-packages/Cython/Build/IpythonMagic.py

@@ -0,0 +1,560 @@
+"""
+=====================
+Cython related magics
+=====================
+
+Magic command interface for interactive work with Cython
+
+.. note::
+
+  The ``Cython`` package needs to be installed separately. It
+  can be obtained using ``easy_install`` or ``pip``.
+
+Usage
+=====
+
+To enable the magics below, execute ``%load_ext cython``.
+
+``%%cython``
+
+{CYTHON_DOC}
+
+``%%cython_inline``
+
+{CYTHON_INLINE_DOC}
+
+``%%cython_pyximport``
+
+{CYTHON_PYXIMPORT_DOC}
+
+Author:
+* Brian Granger
+
+Code moved from IPython and adapted by:
+* Martín Gaitán
+
+Parts of this code were taken from Cython.inline.
+"""
+#-----------------------------------------------------------------------------
+# Copyright (C) 2010-2011, IPython Development Team.
+#
+# Distributed under the terms of the Modified BSD License.
+#
+# The full license is in the file ipython-COPYING.rst, distributed with this software.
+#-----------------------------------------------------------------------------
+
+
+import io
+import os
+import re
+import sys
+import time
+import copy
+import distutils.log
+import textwrap
+
+IO_ENCODING = sys.getfilesystemencoding()
+
+import hashlib
+from distutils.core import Distribution, Extension
+from distutils.command.build_ext import build_ext
+
+from IPython.core import display
+from IPython.core import magic_arguments
+from IPython.core.magic import Magics, magics_class, cell_magic
+try:
+    from IPython.paths import get_ipython_cache_dir
+except ImportError:
+    # older IPython version
+    from IPython.utils.path import get_ipython_cache_dir
+from IPython.utils.text import dedent
+
+from ..Shadow import __version__ as cython_version
+from ..Compiler.Errors import CompileError
+from .Inline import cython_inline, load_dynamic
+from .Dependencies import cythonize
+from ..Utils import captured_fd, print_captured
+
+
+PGO_CONFIG = {
+    'gcc': {
+        'gen': ['-fprofile-generate', '-fprofile-dir={TEMPDIR}'],
+        'use': ['-fprofile-use', '-fprofile-correction', '-fprofile-dir={TEMPDIR}'],
+    },
+    # blind copy from 'configure' script in CPython 3.7
+    'icc': {
+        'gen': ['-prof-gen'],
+        'use': ['-prof-use'],
+    }
+}
+PGO_CONFIG['mingw32'] = PGO_CONFIG['gcc']
+
+
+@magics_class
+class CythonMagics(Magics):
+
+    def __init__(self, shell):
+        super().__init__(shell)
+        self._reloads = {}
+        self._code_cache = {}
+        self._pyximport_installed = False
+
+    def _import_all(self, module):
+        mdict = module.__dict__
+        if '__all__' in mdict:
+            keys = mdict['__all__']
+        else:
+            keys = [k for k in mdict if not k.startswith('_')]
+
+        for k in keys:
+            try:
+                self.shell.push({k: mdict[k]})
+            except KeyError:
+                msg = "'module' object has no attribute '%s'" % k
+                raise AttributeError(msg)
+
+    @cell_magic
+    def cython_inline(self, line, cell):
+        """Compile and run a Cython code cell using Cython.inline.
+
+        This magic simply passes the body of the cell to Cython.inline
+        and returns the result. If the variables `a` and `b` are defined
+        in the user's namespace, here is a simple example that returns
+        their sum::
+
+            %%cython_inline
+            return a+b
+
+        For most purposes, we recommend the usage of the `%%cython` magic.
+        """
+        locs = self.shell.user_global_ns
+        globs = self.shell.user_ns
+        return cython_inline(cell, locals=locs, globals=globs)
+
+    @cell_magic
+    def cython_pyximport(self, line, cell):
+        """Compile and import a Cython code cell using pyximport.
+
+        The contents of the cell are written to a `.pyx` file in the current
+        working directory, which is then imported using `pyximport`. This
+        magic requires a module name to be passed::
+
+            %%cython_pyximport modulename
+            def f(x):
+                return 2.0*x
+
+        The compiled module is then imported and all of its symbols are
+        injected into the user's namespace. For most purposes, we recommend
+        the usage of the `%%cython` magic.
+        """
+        module_name = line.strip()
+        if not module_name:
+            raise ValueError('module name must be given')
+        fname = module_name + '.pyx'
+        with open(fname, 'w', encoding='utf-8') as f:
+            f.write(cell)
+        if 'pyximport' not in sys.modules or not self._pyximport_installed:
+            import pyximport
+            pyximport.install()
+            self._pyximport_installed = True
+        if module_name in self._reloads:
+            module = self._reloads[module_name]
+            # Note: reloading extension modules is not actually supported
+            # (requires PEP-489 reinitialisation support).
+            # Don't know why this should ever have worked as it reads here.
+            # All we really need to do is to update the globals below.
+            #reload(module)
+        else:
+            __import__(module_name)
+            module = sys.modules[module_name]
+            self._reloads[module_name] = module
+        self._import_all(module)
+
+    @magic_arguments.magic_arguments()
+    @magic_arguments.argument(
+        '-a', '--annotate', action='store_const', const='default', dest='annotate',
+        help="Produce a colorized HTML version of the source."
+    )
+    @magic_arguments.argument(
+        '--annotate-fullc', action='store_const', const='fullc', dest='annotate',
+        help="Produce a colorized HTML version of the source "
+             "which includes entire generated C/C++-code."
+    )
+    @magic_arguments.argument(
+        '-+', '--cplus', action='store_true', default=False,
+        help="Output a C++ rather than C file."
+    )
+    @magic_arguments.argument(
+        '-3', dest='language_level', action='store_const', const=3, default=None,
+        help="Select Python 3 syntax."
+    )
+    @magic_arguments.argument(
+        '-2', dest='language_level', action='store_const', const=2, default=None,
+        help="Select Python 2 syntax."
+    )
+    @magic_arguments.argument(
+        '-f', '--force', action='store_true', default=False,
+        help="Force the compilation of a new module, even if the source has been "
+             "previously compiled."
+    )
+    @magic_arguments.argument(
+        '-c', '--compile-args', action='append', default=[],
+        help="Extra flags to pass to compiler via the `extra_compile_args` "
+             "Extension flag (can be specified  multiple times)."
+    )
+    @magic_arguments.argument(
+        '--link-args', action='append', default=[],
+        help="Extra flags to pass to linker via the `extra_link_args` "
+             "Extension flag (can be specified  multiple times)."
+    )
+    @magic_arguments.argument(
+        '-l', '--lib', action='append', default=[],
+        help="Add a library to link the extension against (can be specified "
+             "multiple times)."
+    )
+    @magic_arguments.argument(
+        '-n', '--name',
+        help="Specify a name for the Cython module."
+    )
+    @magic_arguments.argument(
+        '-L', dest='library_dirs', metavar='dir', action='append', default=[],
+        help="Add a path to the list of library directories (can be specified "
+             "multiple times)."
+    )
+    @magic_arguments.argument(
+        '-I', '--include', action='append', default=[],
+        help="Add a path to the list of include directories (can be specified "
+             "multiple times)."
+    )
+    @magic_arguments.argument(
+        '-S', '--src', action='append', default=[],
+        help="Add a path to the list of src files (can be specified "
+             "multiple times)."
+    )
+    @magic_arguments.argument(
+        '--pgo', dest='pgo', action='store_true', default=False,
+        help=("Enable profile guided optimisation in the C compiler. "
+              "Compiles the cell twice and executes it in between to generate a runtime profile.")
+    )
+    @magic_arguments.argument(
+        '--verbose', dest='quiet', action='store_false', default=True,
+        help=("Print debug information like generated .c/.cpp file location "
+              "and exact gcc/g++ command invoked.")
+    )
+    @cell_magic
+    def cython(self, line, cell):
+        """Compile and import everything from a Cython code cell.
+
+        The contents of the cell are written to a `.pyx` file in the
+        directory returned by `get_ipython_cache_dir()/cython` using a filename
+        with the hash of the code. This file is then cythonized and compiled.
+        The resulting module is imported and all of its symbols are injected
+        into the user's namespace. The usage is similar to that of
+        `%%cython_pyximport` but you don't have to pass a module name::
+
+            %%cython
+            def f(x):
+                return 2.0*x
+
+        To compile OpenMP codes, pass the required  `--compile-args`
+        and `--link-args`.  For example with gcc::
+
+            %%cython --compile-args=-fopenmp --link-args=-fopenmp
+            ...
+
+        To enable profile guided optimisation, pass the ``--pgo`` option.
+        Note that the cell itself needs to take care of establishing a suitable
+        profile when executed. This can be done by implementing the functions to
+        optimise, and then calling them directly in the same cell on some realistic
+        training data like this::
+
+            %%cython --pgo
+            def critical_function(data):
+                for item in data:
+                    ...
+
+            # execute function several times to build profile
+            from somewhere import some_typical_data
+            for _ in range(100):
+                critical_function(some_typical_data)
+
+        In Python 3.5 and later, you can distinguish between the profile and
+        non-profile runs as follows::
+
+            if "_pgo_" in __name__:
+                ...  # execute critical code here
+        """
+        args = magic_arguments.parse_argstring(self.cython, line)
+        code = cell if cell.endswith('\n') else cell + '\n'
+        lib_dir = os.path.join(get_ipython_cache_dir(), 'cython')
+        key = (code, line, sys.version_info, sys.executable, cython_version)
+
+        if not os.path.exists(lib_dir):
+            os.makedirs(lib_dir)
+
+        if args.pgo:
+            key += ('pgo',)
+        if args.force:
+            # Force a new module name by adding the current time to the
+            # key which is hashed to determine the module name.
+            key += (time.time(),)
+
+        if args.name:
+            module_name = str(args.name)  # no-op in Py3
+        else:
+            module_name = "_cython_magic_" + hashlib.sha256(str(key).encode('utf-8')).hexdigest()
+        html_file = os.path.join(lib_dir, module_name + '.html')
+        module_path = os.path.join(lib_dir, module_name + self.so_ext)
+
+        have_module = os.path.isfile(module_path)
+        need_cythonize = args.pgo or not have_module
+
+        if args.annotate:
+            if not os.path.isfile(html_file):
+                need_cythonize = True
+
+        extension = None
+        if need_cythonize:
+            extensions = self._cythonize(module_name, code, lib_dir, args, quiet=args.quiet)
+            if extensions is None:
+                # Compilation failed and printed error message
+                return None
+            assert len(extensions) == 1
+            extension = extensions[0]
+            self._code_cache[key] = module_name
+
+            if args.pgo:
+                self._profile_pgo_wrapper(extension, lib_dir)
+
+        def print_compiler_output(stdout, stderr, where):
+            # On windows, errors are printed to stdout, we redirect both to sys.stderr.
+            print_captured(stdout, where, "Content of stdout:\n")
+            print_captured(stderr, where, "Content of stderr:\n")
+
+        get_stderr = get_stdout = None
+        try:
+            with captured_fd(1) as get_stdout:
+                with captured_fd(2) as get_stderr:
+                    self._build_extension(
+                        extension, lib_dir, pgo_step_name='use' if args.pgo else None, quiet=args.quiet)
+        except (distutils.errors.CompileError, distutils.errors.LinkError):
+            # Build failed, print error message from compiler/linker
+            print_compiler_output(get_stdout(), get_stderr(), sys.stderr)
+            return None
+
+        # Build seems ok, but we might still want to show any warnings that occurred
+        print_compiler_output(get_stdout(), get_stderr(), sys.stdout)
+
+        module = load_dynamic(module_name, module_path)
+        self._import_all(module)
+
+        if args.annotate:
+            try:
+                with open(html_file, encoding='utf-8') as f:
+                    annotated_html = f.read()
+            except OSError as e:
+                # File could not be opened. Most likely the user has a version
+                # of Cython before 0.15.1 (when `cythonize` learned the
+                # `force` keyword argument) and has already compiled this
+                # exact source without annotation.
+                print('Cython completed successfully but the annotated '
+                      'source could not be read.', file=sys.stderr)
+                print(e, file=sys.stderr)
+            else:
+                return display.HTML(self.clean_annotated_html(annotated_html))
+
+    def _profile_pgo_wrapper(self, extension, lib_dir):
+        """
+        Generate a .c file for a separate extension module that calls the
+        module init function of the original module.  This makes sure that the
+        PGO profiler sees the correct .o file of the final module, but it still
+        allows us to import the module under a different name for profiling,
+        before recompiling it into the PGO optimised module.  Overwriting and
+        reimporting the same shared library is not portable.
+        """
+        extension = copy.copy(extension)  # shallow copy, do not modify sources in place!
+        module_name = extension.name
+        pgo_module_name = '_pgo_' + module_name
+        pgo_wrapper_c_file = os.path.join(lib_dir, pgo_module_name + '.c')
+        with open(pgo_wrapper_c_file, 'w', encoding='utf-8') as f:
+            f.write(textwrap.dedent("""
+            #include "Python.h"
+            extern PyMODINIT_FUNC PyInit_%(module_name)s(void);
+            PyMODINIT_FUNC PyInit_%(pgo_module_name)s(void); /*proto*/
+            PyMODINIT_FUNC PyInit_%(pgo_module_name)s(void) {
+                return PyInit_%(module_name)s();
+            }
+            """ % {'module_name': module_name, 'pgo_module_name': pgo_module_name}))
+
+        extension.sources = extension.sources + [pgo_wrapper_c_file]  # do not modify in place!
+        extension.name = pgo_module_name
+
+        self._build_extension(extension, lib_dir, pgo_step_name='gen')
+
+        # import and execute module code to generate profile
+        so_module_path = os.path.join(lib_dir, pgo_module_name + self.so_ext)
+        load_dynamic(pgo_module_name, so_module_path)
+
+    def _cythonize(self, module_name, code, lib_dir, args, quiet=True):
+        pyx_file = os.path.join(lib_dir, module_name + '.pyx')
+
+        c_include_dirs = args.include
+        c_src_files = list(map(str, args.src))
+        if 'numpy' in code:
+            import numpy
+            c_include_dirs.append(numpy.get_include())
+        with open(pyx_file, 'w', encoding='utf-8') as f:
+            f.write(code)
+        extension = Extension(
+            name=module_name,
+            sources=[pyx_file] + c_src_files,
+            include_dirs=c_include_dirs,
+            library_dirs=args.library_dirs,
+            extra_compile_args=args.compile_args,
+            extra_link_args=args.link_args,
+            libraries=args.lib,
+            language='c++' if args.cplus else 'c',
+        )
+        try:
+            opts = dict(
+                quiet=quiet,
+                annotate=args.annotate,
+                force=True,
+                language_level=min(3, sys.version_info[0]),
+            )
+            if args.language_level is not None:
+                assert args.language_level in (2, 3)
+                opts['language_level'] = args.language_level
+            return cythonize([extension], **opts)
+        except CompileError:
+            return None
+
+    def _build_extension(self, extension, lib_dir, temp_dir=None, pgo_step_name=None, quiet=True):
+        build_extension = self._get_build_extension(
+            extension, lib_dir=lib_dir, temp_dir=temp_dir, pgo_step_name=pgo_step_name)
+        old_threshold = None
+        try:
+            if not quiet:
+                old_threshold = distutils.log.set_threshold(distutils.log.DEBUG)
+            build_extension.run()
+        finally:
+            if not quiet and old_threshold is not None:
+                distutils.log.set_threshold(old_threshold)
+
+    def _add_pgo_flags(self, build_extension, step_name, temp_dir):
+        compiler_type = build_extension.compiler.compiler_type
+        if compiler_type == 'unix':
+            compiler_cmd = build_extension.compiler.compiler_so
+            # TODO: we could try to call "[cmd] --version" for better insights
+            if not compiler_cmd:
+                pass
+            elif 'clang' in compiler_cmd or 'clang' in compiler_cmd[0]:
+                compiler_type = 'clang'
+            elif 'icc' in compiler_cmd or 'icc' in compiler_cmd[0]:
+                compiler_type = 'icc'
+            elif 'gcc' in compiler_cmd or 'gcc' in compiler_cmd[0]:
+                compiler_type = 'gcc'
+            elif 'g++' in compiler_cmd or 'g++' in compiler_cmd[0]:
+                compiler_type = 'gcc'
+        config = PGO_CONFIG.get(compiler_type)
+        orig_flags = []
+        if config and step_name in config:
+            flags = [f.format(TEMPDIR=temp_dir) for f in config[step_name]]
+            for extension in build_extension.extensions:
+                orig_flags.append((extension.extra_compile_args, extension.extra_link_args))
+                extension.extra_compile_args = extension.extra_compile_args + flags
+                extension.extra_link_args = extension.extra_link_args + flags
+        else:
+            print("No PGO %s configuration known for C compiler type '%s'" % (step_name, compiler_type),
+                  file=sys.stderr)
+        return orig_flags
+
+    @property
+    def so_ext(self):
+        """The extension suffix for compiled modules."""
+        try:
+            return self._so_ext
+        except AttributeError:
+            self._so_ext = self._get_build_extension().get_ext_filename('')
+            return self._so_ext
+
+    def _clear_distutils_mkpath_cache(self):
+        """clear distutils mkpath cache
+
+        prevents distutils from skipping re-creation of dirs that have been removed
+        """
+        try:
+            from distutils.dir_util import _path_created
+        except ImportError:
+            pass
+        else:
+            _path_created.clear()
+
+    def _get_build_extension(self, extension=None, lib_dir=None, temp_dir=None,
+                             pgo_step_name=None, _build_ext=build_ext):
+        self._clear_distutils_mkpath_cache()
+        dist = Distribution()
+        config_files = dist.find_config_files()
+        try:
+            config_files.remove('setup.cfg')
+        except ValueError:
+            pass
+        dist.parse_config_files(config_files)
+
+        if not temp_dir:
+            temp_dir = lib_dir
+        add_pgo_flags = self._add_pgo_flags
+
+        if pgo_step_name:
+            base_build_ext = _build_ext
+            class _build_ext(_build_ext):
+                def build_extensions(self):
+                    add_pgo_flags(self, pgo_step_name, temp_dir)
+                    base_build_ext.build_extensions(self)
+
+        build_extension = _build_ext(dist)
+        build_extension.finalize_options()
+        if temp_dir:
+            build_extension.build_temp = temp_dir
+        if lib_dir:
+            build_extension.build_lib = lib_dir
+        if extension is not None:
+            build_extension.extensions = [extension]
+        return build_extension
+
+    @staticmethod
+    def clean_annotated_html(html, include_style=True):
+        """Clean up the annotated HTML source.
+
+        Strips the link to the generated C or C++ file, which we do not
+        present to the user.
+
+        Returns an HTML snippet (no <html>, <head>, or <body>),
+        containing only the style tag(s) and _contents_ of the body,
+        appropriate for embedding multiple times in cell output.
+        """
+        # extract CSS and body, rather than full HTML document
+        chunks = []
+        if include_style:
+            styles = re.findall("<style.*</style>", html, re.MULTILINE | re.DOTALL)
+            chunks.extend(styles)
+        # extract body
+        body = re.search(
+            r"<body[^>]*>(.+)</body>", html, re.MULTILINE | re.DOTALL
+        ).group(1)
+
+        # exclude link to generated file
+        r = re.compile('<p>Raw output: <a href="(.*)">(.*)</a>')
+        for line in body.splitlines():
+            if not r.match(line):
+                chunks.append(line)
+        return "\n".join(chunks)
+
+__doc__ = __doc__.format(
+    # rST doesn't see the -+ flag as part of an option list, so we
+    # hide it from the module-level docstring.
+    CYTHON_DOC=dedent(CythonMagics.cython.__doc__
+                                  .replace('-+, --cplus', '--cplus    ')),
+    CYTHON_INLINE_DOC=dedent(CythonMagics.cython_inline.__doc__),
+    CYTHON_PYXIMPORT_DOC=dedent(CythonMagics.cython_pyximport.__doc__),
+)

venv/lib/python3.10/site-packages/Cython/Build/SharedModule.py

@@ -0,0 +1,76 @@
+import tempfile
+import os
+import shutil
+
+from Cython.Compiler import (
+    MemoryView, Code, Options, Pipeline, Errors, Main, Symtab
+)
+from Cython.Compiler.StringEncoding import EncodedString
+from Cython.Compiler.Scanning import FileSourceDescriptor
+
+
+def create_shared_library_pipeline(context, scope, options, result):
+
+    parse = Pipeline.parse_stage_factory(context)
+
+    def generate_tree_factory(context):
+        def generate_tree(compsrc):
+            tree = parse(compsrc)
+
+            tree.scope.use_utility_code(
+                MemoryView.get_view_utility_code(options.shared_utility_qualified_name))
+
+            tree.scope.use_utility_code(MemoryView._get_memviewslice_declare_code())
+            tree.scope.use_utility_code(MemoryView._get_typeinfo_to_format_code())
+            context.include_directories.append(Code.get_utility_dir())
+            return tree
+
+        return generate_tree
+
+    orig_cimport_from_pyx = Options.cimport_from_pyx
+
+    def set_cimport_from_pyx(cimport_from_pyx):
+        def inner(node):
+            Options.cimport_from_pyx = cimport_from_pyx
+            return node
+        return inner
+
+    return [
+        # "cimport_from_pyx=True" to force generating __Pyx_ExportFunction
+        set_cimport_from_pyx(True),
+        generate_tree_factory(context),
+        *Pipeline.create_pipeline(context, 'pyx', exclude_classes=()),
+        Pipeline.inject_pxd_code_stage_factory(context),
+        Pipeline.inject_utility_code_stage_factory(context, internalise_c_class_entries=False),
+        Pipeline.inject_utility_pxd_code_stage_factory(context),
+        Pipeline.abort_on_errors,
+        Pipeline.generate_pyx_code_stage_factory(options, result),
+        set_cimport_from_pyx(orig_cimport_from_pyx),
+    ]
+
+
+def generate_shared_module(options):
+    Errors.init_thread()
+    Errors.open_listing_file(None)
+
+    dest_c_file = options.shared_c_file_path
+    module_name = os.path.splitext(os.path.basename(dest_c_file))[0]
+
+    context = Main.Context.from_options(options)
+    scope = Symtab.ModuleScope('MemoryView', parent_module = None, context = context, is_package=False)
+
+    with tempfile.TemporaryDirectory() as tmpdirname:
+        pyx_file = os.path.join(tmpdirname, f'{module_name}.pyx')
+        c_file = os.path.join(tmpdirname, f'{module_name}.c')
+        with open(pyx_file, 'w'):
+            pass
+        source_desc = FileSourceDescriptor(pyx_file)
+        comp_src = Main.CompilationSource(source_desc, EncodedString(module_name), os.getcwd())
+        result = Main.create_default_resultobj(comp_src, options)
+
+        pipeline = create_shared_library_pipeline(context, scope, options, result)
+        err, enddata = Pipeline.run_pipeline(pipeline, comp_src)
+        if err is None:
+            shutil.copy(c_file, dest_c_file)
+
+    return err, enddata

venv/lib/python3.10/site-packages/Cython/Build/Tests/TestCyCache.py

@@ -0,0 +1,194 @@
+import difflib
+import glob
+import gzip
+import os
+import sys
+import tempfile
+import unittest
+
+import Cython.Build.Dependencies
+import Cython.Compiler.Main
+import Cython.Utils
+from Cython.TestUtils import CythonTest
+
+
+class TestCyCache(CythonTest):
+
+    def setUp(self):
+        CythonTest.setUp(self)
+        self.temp_dir = tempfile.mkdtemp(
+            prefix='cycache-test',
+            dir='TEST_TMP' if os.path.isdir('TEST_TMP') else None)
+        self.src_dir = tempfile.mkdtemp(prefix='src', dir=self.temp_dir)
+        self.cache_dir = tempfile.mkdtemp(prefix='cache', dir=self.temp_dir)
+
+    def cache_files(self, file_glob):
+        return glob.glob(os.path.join(self.cache_dir, file_glob))
+
+    def fresh_cythonize(self, *args, **kwargs):
+        Cython.Utils.clear_function_caches()
+        Cython.Build.Dependencies._dep_tree = None  # discard method caches
+        Cython.Build.Dependencies.cythonize(*args, **kwargs)
+
+    def fresh_compile(self, *args, **kwargs):
+        Cython.Utils.clear_function_caches()
+        Cython.Compiler.Main.compile(*args, **kwargs)
+
+
+    def _test_cycache_switch(self, compilation_method):
+        content1 = 'value = 1\n'
+        content2 = 'value = 2\n'
+        a_pyx = os.path.join(self.src_dir, 'a.pyx')
+        a_c = a_pyx[:-4] + '.c'
+
+        with open(a_pyx, 'w') as f:
+            f.write(content1)
+
+        compilation_method(a_pyx, cache=self.cache_dir)
+        compilation_method(a_pyx, cache=self.cache_dir)
+
+        self.assertEqual(1, len(self.cache_files('a.c*')))
+        with open(a_c) as f:
+            a_contents1 = f.read()
+        os.unlink(a_c)
+
+        with open(a_pyx, 'w') as f:
+            f.write(content2)
+
+        compilation_method(a_pyx, cache=self.cache_dir)
+
+        with open(a_c) as f:
+            a_contents2 = f.read()
+        os.unlink(a_c)
+
+        self.assertNotEqual(a_contents1, a_contents2, 'C file not changed!')
+        self.assertEqual(2, len(self.cache_files('a.c*')))
+
+        with open(a_pyx, 'w') as f:
+            f.write(content1)
+
+        compilation_method(a_pyx, cache=self.cache_dir)
+
+        self.assertEqual(2, len(self.cache_files('a.c*')))
+        with open(a_c) as f:
+            a_contents = f.read()
+        self.assertEqual(
+            a_contents, a_contents1,
+            msg='\n'.join(list(difflib.unified_diff(
+                a_contents.split('\n'), a_contents1.split('\n')))[:10]))
+
+    def test_cycache_switch_cythonize(self):
+        self._test_cycache_switch(self.fresh_cythonize)
+
+    def test_cycache_switch_compile(self):
+        self._test_cycache_switch(self.fresh_compile)
+
+    def _test_cycache_uses_cache(self, compilation_method):
+        a_pyx = os.path.join(self.src_dir, 'a.pyx')
+        a_c = a_pyx[:-4] + '.c'
+        with open(a_pyx, 'w') as f:
+            f.write('pass')
+
+        compilation_method(a_pyx, cache=self.cache_dir)
+
+        a_cache = os.path.join(self.cache_dir, os.listdir(self.cache_dir)[0])
+        with gzip.GzipFile(a_cache, 'wb') as gzipfile:
+            gzipfile.write(b'fake stuff')
+        os.unlink(a_c)
+
+        compilation_method(a_pyx, cache=self.cache_dir)
+
+        with open(a_c) as f:
+            a_contents = f.read()
+        self.assertEqual(a_contents, 'fake stuff',
+                         'Unexpected contents: %s...' % a_contents[:100])
+
+
+    def test_cycache_uses_cache_cythonize(self):
+        self._test_cycache_uses_cache(self.fresh_cythonize)
+
+    def test_cycache_uses_cache_compile(self):
+        self._test_cycache_uses_cache(self.fresh_compile)
+
+    def _test_cycache_annotation(self, compilation_method):
+        a_pyx = os.path.join(self.src_dir, 'a.pyx')
+        a_c = a_pyx[:-4] + '.c'
+        a_html = a_pyx[:-4] + '.html'
+        with open(a_pyx, 'w') as f:
+            f.write('pass')
+
+        compilation_method(a_pyx, cache=self.cache_dir, annotate='default')
+        self.assertTrue(os.path.exists(a_html), a_html)
+        os.unlink(a_html)
+        os.unlink(a_c)
+        compilation_method(a_pyx, cache=self.cache_dir, annotate='default')
+        self.assertTrue(os.path.exists(a_html), a_html)
+
+    def test_cycache_annotation_cythonize(self):
+        self._test_cycache_annotation(self.fresh_cythonize)
+
+    def test_cycache_annotation_compile(self):
+        self._test_cycache_annotation(self.fresh_compile)
+
+    def _test_multi_file_output(self, compilation_method):
+        a_pyx = os.path.join(self.src_dir, 'a.pyx')
+        a_c = a_pyx[:-4] + '.c'
+        a_h = a_pyx[:-4] + '.h'
+        a_api_h = a_pyx[:-4] + '_api.h'
+        with open(a_pyx, 'w') as f:
+            f.write('cdef public api int foo(int x): return x\n')
+
+        compilation_method(a_pyx, cache=self.cache_dir)
+
+        expected = [a_c, a_h, a_api_h]
+        for output in expected:
+            self.assertTrue(os.path.exists(output), output)
+            os.unlink(output)
+
+        compilation_method(a_pyx, cache=self.cache_dir)
+
+        for output in expected:
+            self.assertTrue(os.path.exists(output), output)
+
+    def test_multi_file_output_cythonize(self):
+        self._test_multi_file_output(self.fresh_cythonize)
+
+    def test_multi_file_output_compile(self):
+        self._test_multi_file_output(self.fresh_compile)
+
+    def _test_options_invalidation(self, compilation_method):
+        hash_pyx = os.path.join(self.src_dir, 'options.pyx')
+        hash_c = hash_pyx[:-len('.pyx')] + '.c'
+        hash_cpp = hash_pyx[:-len('.pyx')] + '.cpp'
+
+        with open(hash_pyx, 'w') as f:
+            f.write('pass')
+        compilation_method(hash_pyx, cache=self.cache_dir, cplus=False)
+        self.assertEqual(1, len(self.cache_files('options.c*')))
+
+        os.unlink(hash_c)
+
+        compilation_method(hash_pyx, cache=self.cache_dir, cplus=True)
+
+        self.assertEqual(2, len(self.cache_files('options.c*')))
+
+        try:
+            os.unlink(hash_c)
+        except FileNotFoundError:
+            # fresh_cythonize() produces .c file, fresh_compile produces .cpp file
+            os.unlink(hash_cpp)
+
+        compilation_method(hash_pyx, cache=self.cache_dir, cplus=False, show_version=False)
+
+        self.assertEqual(2, len(self.cache_files('options.c*')))
+
+        os.unlink(hash_c)
+
+        compilation_method(hash_pyx, cache=self.cache_dir, cplus=False, show_version=True)
+
+        self.assertEqual(2, len(self.cache_files('options.c*')))
+    def test_options_invalidation_cythonize(self):
+        self._test_options_invalidation(self.fresh_cythonize)
+
+    def test_options_invalidation_compile(self):
+        self._test_options_invalidation(self.fresh_compile)

venv/lib/python3.10/site-packages/Cython/Build/Tests/TestCythonizeArgsParser.py

@@ -0,0 +1,481 @@
+from Cython.Build.Cythonize import (
+    create_args_parser, parse_args_raw, parse_args,
+    parallel_compiles
+)
+
+from Cython.Compiler import Options
+from Cython.Compiler.Tests.Utils import backup_Options, restore_Options, check_global_options
+
+from unittest import TestCase
+
+import sys
+from io import StringIO
+
+
+class TestCythonizeArgsParser(TestCase):
+
+    def setUp(self):
+        TestCase.setUp(self)
+        self.parse_args = lambda x, parser=create_args_parser() : parse_args_raw(parser, x)
+
+
+    def are_default(self, options, skip):
+        # empty containers
+        empty_containers = ['directives', 'compile_time_env', 'options', 'excludes']
+        are_none = ['language_level', 'annotate', 'build', 'build_inplace', 'force', 'quiet', 'lenient', 'keep_going', 'no_docstrings']
+        for opt_name in empty_containers:
+            if len(getattr(options, opt_name))!=0 and (opt_name not in skip):
+                self.assertEqual(opt_name,"", msg="For option "+opt_name)
+                return False
+        for opt_name in are_none:
+            if (getattr(options, opt_name) is not None) and (opt_name not in skip):
+                self.assertEqual(opt_name,"", msg="For option "+opt_name)
+                return False
+        if options.parallel!=parallel_compiles and ('parallel' not in skip):
+            return False
+        return True
+
+    # testing directives:
+    def test_directive_short(self):
+        options, args =  self.parse_args(['-X', 'cdivision=True'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['directives']))
+        self.assertEqual(options.directives['cdivision'], True)
+
+    def test_directive_long(self):
+        options, args =  self.parse_args(['--directive', 'cdivision=True'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['directives']))
+        self.assertEqual(options.directives['cdivision'], True)
+
+    def test_directive_multiple(self):
+        options, args =  self.parse_args(['-X', 'cdivision=True', '-X', 'c_string_type=bytes'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['directives']))
+        self.assertEqual(options.directives['cdivision'], True)
+        self.assertEqual(options.directives['c_string_type'], 'bytes')
+
+    def test_directive_multiple_v2(self):
+        options, args =  self.parse_args(['-X', 'cdivision=True,c_string_type=bytes'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['directives']))
+        self.assertEqual(options.directives['cdivision'], True)
+        self.assertEqual(options.directives['c_string_type'], 'bytes')
+
+    def test_directive_value_yes(self):
+        options, args =  self.parse_args(['-X', 'cdivision=YeS'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['directives']))
+        self.assertEqual(options.directives['cdivision'], True)
+
+    def test_directive_value_no(self):
+        options, args =  self.parse_args(['-X', 'cdivision=no'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['directives']))
+        self.assertEqual(options.directives['cdivision'], False)
+
+    def test_directive_value_invalid(self):
+        with self.assertRaises(ValueError) as context:
+            options, args =  self.parse_args(['-X', 'cdivision=sadfasd'])
+
+    def test_directive_key_invalid(self):
+        with self.assertRaises(ValueError) as context:
+            options, args =  self.parse_args(['-X', 'abracadabra'])
+
+    def test_directive_no_value(self):
+        with self.assertRaises(ValueError) as context:
+            options, args =  self.parse_args(['-X', 'cdivision'])
+
+    def test_directives_types(self):
+        directives = [
+            ('auto_pickle', True),
+            ('c_string_type', 'bytearray'),
+            ('c_string_type', 'bytes'),
+            ('c_string_type', 'str'),
+            ('c_string_type', 'bytearray'),
+            ('c_string_type', 'unicode'),
+            ('c_string_encoding', 'ascii'),
+            ('language_level', '2'),
+            ('language_level', '3'),
+            #('language_level', '3str'),
+            ('set_initial_path', 'my_initial_path'),
+        ]
+        for key, value in directives:
+            cmd = '{key}={value}'.format(key=key, value=str(value))
+            options, args =  self.parse_args(['-X', cmd])
+            self.assertFalse(args)
+            self.assertTrue(self.are_default(options, ['directives']), msg = "Error for option: "+cmd)
+            if value == 'unicode':
+                value = 'str'
+            self.assertEqual(options.directives[key], value, msg = "Error for option: "+cmd)
+
+    def test_directives_wrong(self):
+        directives = [
+            ('auto_pickle', 42),        # for bool type
+            ('auto_pickle', 'NONONO'),  # for bool type
+            ('c_string_type', 'bites'),
+            #('c_string_encoding', 'a'),
+            #('language_level', 4),
+        ]
+        for key, value in directives:
+            cmd = '{key}={value}'.format(key=key, value=str(value))
+            with self.assertRaises(ValueError, msg = "Error for option: "+cmd) as context:
+                options, args =  self.parse_args(['-X', cmd])
+
+    def test_compile_time_env_short(self):
+        options, args =  self.parse_args(['-E', 'MYSIZE=10'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['compile_time_env']))
+        self.assertEqual(options.compile_time_env['MYSIZE'], 10)
+
+    def test_compile_time_env_long(self):
+        options, args =  self.parse_args(['--compile-time-env', 'MYSIZE=10'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['compile_time_env']))
+        self.assertEqual(options.compile_time_env['MYSIZE'], 10)
+
+    def test_compile_time_env_multiple(self):
+        options, args =  self.parse_args(['-E', 'MYSIZE=10', '-E', 'ARRSIZE=11'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['compile_time_env']))
+        self.assertEqual(options.compile_time_env['MYSIZE'], 10)
+        self.assertEqual(options.compile_time_env['ARRSIZE'], 11)
+
+    def test_compile_time_env_multiple_v2(self):
+        options, args =  self.parse_args(['-E', 'MYSIZE=10,ARRSIZE=11'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['compile_time_env']))
+        self.assertEqual(options.compile_time_env['MYSIZE'], 10)
+        self.assertEqual(options.compile_time_env['ARRSIZE'], 11)
+
+    #testing options
+    def test_option_short(self):
+        options, args =  self.parse_args(['-s', 'docstrings=True'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['options']))
+        self.assertEqual(options.options['docstrings'], True)
+
+    def test_option_long(self):
+        options, args =  self.parse_args(['--option', 'docstrings=True'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['options']))
+        self.assertEqual(options.options['docstrings'], True)
+
+    def test_option_multiple(self):
+        options, args =  self.parse_args(['-s', 'docstrings=True', '-s', 'buffer_max_dims=8'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['options']))
+        self.assertEqual(options.options['docstrings'], True)
+        self.assertEqual(options.options['buffer_max_dims'], True)  #  really?
+
+    def test_option_multiple_v2(self):
+        options, args =  self.parse_args(['-s', 'docstrings=True,buffer_max_dims=8'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['options']))
+        self.assertEqual(options.options['docstrings'], True)
+        self.assertEqual(options.options['buffer_max_dims'], True)  #  really?
+
+    def test_option_value_yes(self):
+        options, args =  self.parse_args(['-s', 'docstrings=YeS'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['options']))
+        self.assertEqual(options.options['docstrings'], True)
+
+    def test_option_value_4242(self):
+        options, args =  self.parse_args(['-s', 'docstrings=4242'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['options']))
+        self.assertEqual(options.options['docstrings'], True)
+
+    def test_option_value_0(self):
+        options, args =  self.parse_args(['-s', 'docstrings=0'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['options']))
+        self.assertEqual(options.options['docstrings'], False)
+
+    def test_option_value_emptystr(self):
+        options, args =  self.parse_args(['-s', 'docstrings='])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['options']))
+        self.assertEqual(options.options['docstrings'], True)
+
+    def test_option_value_a_str(self):
+        options, args =  self.parse_args(['-s', 'docstrings=BB'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['options']))
+        self.assertEqual(options.options['docstrings'], True)
+
+    def test_option_value_no(self):
+        options, args =  self.parse_args(['-s', 'docstrings=nO'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['options']))
+        self.assertEqual(options.options['docstrings'], False)
+
+    def test_option_no_value(self):
+        options, args =  self.parse_args(['-s', 'docstrings'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['options']))
+        self.assertEqual(options.options['docstrings'], True)
+
+    def test_option_any_key(self):
+        options, args =  self.parse_args(['-s', 'abracadabra'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['options']))
+        self.assertEqual(options.options['abracadabra'], True)
+
+    def test_language_level_2(self):
+        options, args =  self.parse_args(['-2'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['language_level']))
+        self.assertEqual(options.language_level, 2)
+
+    def test_language_level_3(self):
+        options, args =  self.parse_args(['-3'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['language_level']))
+        self.assertEqual(options.language_level, 3)
+
+    def test_language_level_3str(self):
+        options, args =  self.parse_args(['--3str'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['language_level']))
+        self.assertEqual(options.language_level, 3)
+
+    def test_annotate_short(self):
+        options, args =  self.parse_args(['-a'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['annotate']))
+        self.assertEqual(options.annotate, 'default')
+
+    def test_annotate_long(self):
+        options, args =  self.parse_args(['--annotate'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['annotate']))
+        self.assertEqual(options.annotate, 'default')
+
+    def test_annotate_fullc(self):
+        options, args =  self.parse_args(['--annotate-fullc'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['annotate']))
+        self.assertEqual(options.annotate, 'fullc')
+
+    def test_annotate_and_positional(self):
+        options, args =  self.parse_args(['-a', 'foo.pyx'])
+        self.assertEqual(args, ['foo.pyx'])
+        self.assertTrue(self.are_default(options, ['annotate']))
+        self.assertEqual(options.annotate, 'default')
+
+    def test_annotate_and_optional(self):
+        options, args =  self.parse_args(['-a', '--3str'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['annotate', 'language_level']))
+        self.assertEqual(options.annotate, 'default')
+        self.assertEqual(options.language_level, 3)
+
+    def test_exclude_short(self):
+        options, args =  self.parse_args(['-x', '*.pyx'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['excludes']))
+        self.assertTrue('*.pyx' in options.excludes)
+
+    def test_exclude_long(self):
+        options, args =  self.parse_args(['--exclude', '*.pyx'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['excludes']))
+        self.assertTrue('*.pyx' in options.excludes)
+
+    def test_exclude_multiple(self):
+        options, args =  self.parse_args(['--exclude', '*.pyx', '--exclude', '*.py', ])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['excludes']))
+        self.assertEqual(options.excludes, ['*.pyx', '*.py'])
+
+    def test_build_short(self):
+        options, args =  self.parse_args(['-b'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['build']))
+        self.assertEqual(options.build, True)
+
+    def test_build_long(self):
+        options, args =  self.parse_args(['--build'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['build']))
+        self.assertEqual(options.build, True)
+
+    def test_inplace_short(self):
+        options, args =  self.parse_args(['-i'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['build_inplace']))
+        self.assertEqual(options.build_inplace, True)
+
+    def test_inplace_long(self):
+        options, args =  self.parse_args(['--inplace'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['build_inplace']))
+        self.assertEqual(options.build_inplace, True)
+
+    def test_parallel_short(self):
+        options, args =  self.parse_args(['-j', '42'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['parallel']))
+        self.assertEqual(options.parallel, 42)
+
+    def test_parallel_long(self):
+        options, args =  self.parse_args(['--parallel', '42'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['parallel']))
+        self.assertEqual(options.parallel, 42)
+
+    def test_force_short(self):
+        options, args =  self.parse_args(['-f'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['force']))
+        self.assertEqual(options.force, True)
+
+    def test_force_long(self):
+        options, args =  self.parse_args(['--force'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['force']))
+        self.assertEqual(options.force, True)
+
+    def test_quite_short(self):
+        options, args =  self.parse_args(['-q'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['quiet']))
+        self.assertEqual(options.quiet, True)
+
+    def test_quite_long(self):
+        options, args =  self.parse_args(['--quiet'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['quiet']))
+        self.assertEqual(options.quiet, True)
+
+    def test_lenient_long(self):
+        options, args =  self.parse_args(['--lenient'])
+        self.assertTrue(self.are_default(options, ['lenient']))
+        self.assertFalse(args)
+        self.assertEqual(options.lenient, True)
+
+    def test_keep_going_short(self):
+        options, args =  self.parse_args(['-k'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['keep_going']))
+        self.assertEqual(options.keep_going, True)
+
+    def test_keep_going_long(self):
+        options, args =  self.parse_args(['--keep-going'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['keep_going']))
+        self.assertEqual(options.keep_going, True)
+
+    def test_no_docstrings_long(self):
+        options, args =  self.parse_args(['--no-docstrings'])
+        self.assertFalse(args)
+        self.assertTrue(self.are_default(options, ['no_docstrings']))
+        self.assertEqual(options.no_docstrings, True)
+
+    def test_file_name(self):
+        options, args =  self.parse_args(['file1.pyx', 'file2.pyx'])
+        self.assertEqual(len(args), 2)
+        self.assertEqual(args[0], 'file1.pyx')
+        self.assertEqual(args[1], 'file2.pyx')
+        self.assertTrue(self.are_default(options, []))
+
+    def test_option_first(self):
+        options, args =  self.parse_args(['-i', 'file.pyx'])
+        self.assertEqual(args, ['file.pyx'])
+        self.assertEqual(options.build_inplace, True)
+        self.assertTrue(self.are_default(options, ['build_inplace']))
+
+    def test_file_inbetween(self):
+        options, args =  self.parse_args(['-i', 'file.pyx', '-a'])
+        self.assertEqual(args, ['file.pyx'])
+        self.assertEqual(options.build_inplace, True)
+        self.assertEqual(options.annotate, 'default')
+        self.assertTrue(self.are_default(options, ['build_inplace', 'annotate']))
+
+    def test_option_trailing(self):
+        options, args =  self.parse_args(['file.pyx', '-i'])
+        self.assertEqual(args, ['file.pyx'])
+        self.assertEqual(options.build_inplace, True)
+        self.assertTrue(self.are_default(options, ['build_inplace']))
+
+    def test_interspersed_positional(self):
+        options, sources = self.parse_args([
+             'file1.pyx', '-a',
+             'file2.pyx'
+        ])
+        self.assertEqual(sources, ['file1.pyx', 'file2.pyx'])
+        self.assertEqual(options.annotate, 'default')
+        self.assertTrue(self.are_default(options, ['annotate']))
+
+    def test_interspersed_positional2(self):
+        options, sources = self.parse_args([
+             'file1.pyx', '-a',
+             'file2.pyx', '-a', 'file3.pyx'
+        ])
+        self.assertEqual(sources, ['file1.pyx', 'file2.pyx', 'file3.pyx'])
+        self.assertEqual(options.annotate, 'default')
+        self.assertTrue(self.are_default(options, ['annotate']))
+
+    def test_interspersed_positional3(self):
+        options, sources = self.parse_args([
+             '-f', 'f1', 'f2', '-a',
+             'f3', 'f4', '-a', 'f5'
+        ])
+        self.assertEqual(sources, ['f1', 'f2', 'f3', 'f4', 'f5'])
+        self.assertEqual(options.annotate, 'default')
+        self.assertEqual(options.force, True)
+        self.assertTrue(self.are_default(options, ['annotate', 'force']))
+
+    def test_wrong_option(self):
+        old_stderr = sys.stderr
+        stderr = sys.stderr = StringIO()
+        try:
+            self.assertRaises(SystemExit, self.parse_args,
+                              ['--unknown-option']
+                              )
+        finally:
+            sys.stderr = old_stderr
+        self.assertTrue(stderr.getvalue())
+
+
+class TestParseArgs(TestCase):
+    def setUp(self):
+        self._options_backup = backup_Options()
+
+    def tearDown(self):
+        restore_Options(self._options_backup)
+
+    def check_default_global_options(self, white_list=[]):
+        self.assertEqual(check_global_options(self._options_backup, white_list), "")
+
+    def test_build_set_for_inplace(self):
+        options, args = parse_args(['foo.pyx', '-i'])
+        self.assertEqual(options.build, True)
+        self.check_default_global_options()
+
+    def test_lenient(self):
+        options, sources = parse_args(['foo.pyx', '--lenient'])
+        self.assertEqual(sources, ['foo.pyx'])
+        self.assertEqual(Options.error_on_unknown_names, False)
+        self.assertEqual(Options.error_on_uninitialized, False)
+        self.check_default_global_options(['error_on_unknown_names', 'error_on_uninitialized'])
+
+    def test_annotate(self):
+        options, sources = parse_args(['foo.pyx', '--annotate'])
+        self.assertEqual(sources, ['foo.pyx'])
+        self.assertEqual(Options.annotate, 'default')
+        self.check_default_global_options(['annotate'])
+
+    def test_annotate_fullc(self):
+        options, sources = parse_args(['foo.pyx', '--annotate-fullc'])
+        self.assertEqual(sources, ['foo.pyx'])
+        self.assertEqual(Options.annotate, 'fullc')
+        self.check_default_global_options(['annotate'])
+
+    def test_no_docstrings(self):
+        options, sources = parse_args(['foo.pyx', '--no-docstrings'])
+        self.assertEqual(sources, ['foo.pyx'])
+        self.assertEqual(Options.docstrings, False)
+        self.check_default_global_options(['docstrings'])

venv/lib/python3.10/site-packages/Cython/Build/Tests/TestDependencies.py

@@ -0,0 +1,133 @@
+import contextlib
+import os.path
+import tempfile
+import unittest
+from os.path import join as pjoin
+
+from ..Dependencies import extended_iglob
+
+
+@contextlib.contextmanager
+def writable_file(dir_path, filename):
+    with open(pjoin(dir_path, filename), "w", encoding="utf8") as f:
+        yield f
+
+
+class TestGlobbing(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        cls._orig_dir = os.getcwd()
+        cls._tmpdir = tempfile.TemporaryDirectory()
+        temp_path = cls._tmpdir.name
+        os.chdir(temp_path)
+
+        for dir1 in "abcd":
+            for dir1x in [dir1, dir1 + 'x']:
+                for dir2 in "xyz":
+                    dir_path = pjoin(dir1x, dir2)
+                    os.makedirs(dir_path)
+                    with writable_file(dir_path, "file2_pyx.pyx") as f:
+                        f.write('""" PYX """')
+                    with writable_file(dir_path, "file2_py.py") as f:
+                        f.write('""" PY """')
+
+                with writable_file(dir1x, "file1_pyx.pyx") as f:
+                    f.write('""" PYX """')
+                with writable_file(dir1x, "file1_py.py") as f:
+                    f.write('""" PY """')
+
+    @classmethod
+    def tearDownClass(cls):
+        os.chdir(cls._orig_dir)
+        cls._tmpdir.cleanup()
+
+    def files_equal(self, pattern, expected_files):
+        expected_files = sorted(expected_files)
+        # It's the users's choice whether '/' will appear on Windows.
+        matched_files = sorted(path.replace('/', os.sep) for path in extended_iglob(pattern))
+        self.assertListEqual(matched_files, expected_files)  # /
+
+        # Special case for Windows: also support '\' in patterns.
+        if os.sep == '\\' and '/' in pattern:
+            matched_files = sorted(extended_iglob(pattern.replace('/', '\\')))
+            self.assertListEqual(matched_files, expected_files)  # \
+
+    def test_extended_iglob_simple(self):
+        ax_files = [pjoin("a", "x", "file2_pyx.pyx"), pjoin("a", "x", "file2_py.py")]
+        self.files_equal("a/x/*", ax_files)
+        self.files_equal("a/x/*.c12", [])
+        self.files_equal("a/x/*.{py,pyx,c12}", ax_files)
+        self.files_equal("a/x/*.{py,pyx}", ax_files)
+        self.files_equal("a/x/*.{pyx}", ax_files[:1])
+        self.files_equal("a/x/*.pyx", ax_files[:1])
+        self.files_equal("a/x/*.{py}", ax_files[1:])
+        self.files_equal("a/x/*.py", ax_files[1:])
+
+    def test_extended_iglob_simple_star(self):
+        for basedir in "ad":
+            files = [
+                pjoin(basedir, dirname, filename)
+                for dirname in "xyz"
+                for filename in ["file2_pyx.pyx", "file2_py.py"]
+            ]
+            self.files_equal(basedir + "/*/*", files)
+            self.files_equal(basedir + "/*/*.c12", [])
+            self.files_equal(basedir + "/*/*.{py,pyx,c12}", files)
+            self.files_equal(basedir + "/*/*.{py,pyx}", files)
+            self.files_equal(basedir + "/*/*.{pyx}", files[::2])
+            self.files_equal(basedir + "/*/*.pyx", files[::2])
+            self.files_equal(basedir + "/*/*.{py}", files[1::2])
+            self.files_equal(basedir + "/*/*.py", files[1::2])
+
+            for subdir in "xy*":
+                files = [
+                    pjoin(basedir, dirname, filename)
+                    for dirname in "xyz"
+                    if subdir in ('*', dirname)
+                    for filename in ["file2_pyx.pyx", "file2_py.py"]
+                ]
+                path = basedir + '/' + subdir + '/'
+                self.files_equal(path + "*", files)
+                self.files_equal(path + "*.{py,pyx}", files)
+                self.files_equal(path + "*.{pyx}", files[::2])
+                self.files_equal(path + "*.pyx", files[::2])
+                self.files_equal(path + "*.{py}", files[1::2])
+                self.files_equal(path + "*.py", files[1::2])
+
+    def test_extended_iglob_double_star(self):
+        basedirs = os.listdir(".")
+        files = [
+            pjoin(basedir, dirname, filename)
+            for basedir in basedirs
+            for dirname in "xyz"
+            for filename in ["file2_pyx.pyx", "file2_py.py"]
+        ]
+        all_files = [
+            pjoin(basedir, filename)
+            for basedir in basedirs
+            for filename in ["file1_pyx.pyx", "file1_py.py"]
+        ] + files
+        self.files_equal("*/*/*", files)
+        self.files_equal("*/*/**/*", files)
+        self.files_equal("*/**/*.*", all_files)
+        self.files_equal("**/*.*", all_files)
+        self.files_equal("*/**/*.c12", [])
+        self.files_equal("**/*.c12", [])
+        self.files_equal("*/*/*.{py,pyx,c12}", files)
+        self.files_equal("*/*/**/*.{py,pyx,c12}", files)
+        self.files_equal("*/**/*/*.{py,pyx,c12}", files)
+        self.files_equal("**/*/*/*.{py,pyx,c12}", files)
+        self.files_equal("**/*.{py,pyx,c12}", all_files)
+        self.files_equal("*/*/*.{py,pyx}", files)
+        self.files_equal("**/*/*/*.{py,pyx}", files)
+        self.files_equal("*/**/*/*.{py,pyx}", files)
+        self.files_equal("**/*.{py,pyx}", all_files)
+        self.files_equal("*/*/*.{pyx}", files[::2])
+        self.files_equal("**/*.{pyx}", all_files[::2])
+        self.files_equal("*/**/*/*.pyx", files[::2])
+        self.files_equal("*/*/*.pyx", files[::2])
+        self.files_equal("**/*.pyx", all_files[::2])
+        self.files_equal("*/*/*.{py}", files[1::2])
+        self.files_equal("**/*.{py}", all_files[1::2])
+        self.files_equal("*/*/*.py", files[1::2])
+        self.files_equal("**/*.py", all_files[1::2])

venv/lib/python3.10/site-packages/Cython/Build/Tests/TestInline.py

@@ -0,0 +1,177 @@
+import os
+import tempfile
+import unittest
+from Cython.Shadow import inline
+from Cython.Build.Inline import safe_type, cymeit
+from Cython.TestUtils import CythonTest
+
+try:
+    import numpy
+    has_numpy = True
+except:
+    has_numpy = False
+
+test_kwds = dict(force=True, quiet=True)
+
+global_value = 100
+
+class TestInline(CythonTest):
+    def setUp(self):
+        CythonTest.setUp(self)
+        self._call_kwds = dict(test_kwds)
+        if os.path.isdir('TEST_TMP'):
+            lib_dir = os.path.join('TEST_TMP','inline')
+        else:
+            lib_dir = tempfile.mkdtemp(prefix='cython_inline_')
+        self._call_kwds['lib_dir'] = lib_dir
+
+    def test_simple(self):
+        self.assertEqual(inline("return 1+2", **self._call_kwds), 3)
+
+    def test_types(self):
+        self.assertEqual(inline("""
+            cimport cython
+            return cython.typeof(a), cython.typeof(b)
+        """, a=1.0, b=[], **self._call_kwds), ('double', 'list object'))
+
+    def test_locals(self):
+        a = 1
+        b = 2
+        self.assertEqual(inline("return a+b", **self._call_kwds), 3)
+
+    def test_globals(self):
+        self.assertEqual(inline("return global_value + 1", **self._call_kwds), global_value + 1)
+
+    def test_no_return(self):
+        self.assertEqual(inline("""
+            a = 1
+            cdef double b = 2
+            cdef c = []
+        """, **self._call_kwds), dict(a=1, b=2.0, c=[]))
+
+    def test_def_node(self):
+        foo = inline("def foo(x): return x * x", **self._call_kwds)['foo']
+        self.assertEqual(foo(7), 49)
+
+    def test_class_ref(self):
+        class Type:
+            pass
+        tp = inline("Type")['Type']
+        self.assertEqual(tp, Type)
+
+    def test_pure(self):
+        import cython as cy
+        b = inline("""
+        b = cy.declare(float, a)
+        c = cy.declare(cy.pointer(cy.float), &b)
+        return b
+        """, a=3, **self._call_kwds)
+        self.assertEqual(type(b), float)
+
+    def test_compiler_directives(self):
+        self.assertEqual(
+            inline('return sum(x)',
+                   x=[1, 2, 3],
+                   cython_compiler_directives={'boundscheck': False}),
+            6
+        )
+
+    def test_lang_version(self):
+        # GH-3419. Caching for inline code didn't always respect compiler directives.
+        inline_divcode = "def f(int a, int b): return a/b"
+        self.assertEqual(
+            inline(inline_divcode, language_level=2)['f'](5,2),
+            2
+        )
+        self.assertEqual(
+            inline(inline_divcode, language_level=3)['f'](5,2),
+            2.5
+        )
+        self.assertEqual(
+            inline(inline_divcode, language_level=2)['f'](5,2),
+            2
+        )
+
+    def test_repeated_use(self):
+        inline_mulcode = "def f(int a, int b): return a * b"
+        self.assertEqual(inline(inline_mulcode)['f'](5, 2), 10)
+        self.assertEqual(inline(inline_mulcode)['f'](5, 3), 15)
+        self.assertEqual(inline(inline_mulcode)['f'](6, 2), 12)
+        self.assertEqual(inline(inline_mulcode)['f'](5, 2), 10)
+
+        f = inline(inline_mulcode)['f']
+        self.assertEqual(f(5, 2), 10)
+        self.assertEqual(f(5, 3), 15)
+
+    @unittest.skipIf(not has_numpy, "NumPy is not available")
+    def test_numpy(self):
+        import numpy
+        a = numpy.ndarray((10, 20))
+        a[0,0] = 10
+        self.assertEqual(safe_type(a), 'numpy.ndarray[numpy.float64_t, ndim=2]')
+        self.assertEqual(inline("return a[0,0]", a=a, **self._call_kwds), 10.0)
+
+
+class TestCymeit(unittest.TestCase):
+    def _run(self, code, setup_code=None, **kwargs):
+        timings, number = cymeit(code, setup_code=setup_code, **kwargs)
+
+        self.assertGreater(min(timings), 0)
+
+        # Guard that autoscaling leads to reasonable timings.
+        # Note: we cannot compare against the expected 0.2 due to large timing variations on CI.
+        max_time = max(timing * number for timing in timings)
+        if isinstance(max_time, int):
+            self.assertGreaterEqual(max_time, 100_000)
+        else:
+            self.assertGreaterEqual(max_time, 0.0001)
+        self.assertGreater(number, 10)  # arbitrary lower bound for our very quick benchmarks
+
+        return timings
+
+    def test_benchmark_simple(self):
+        setup_code = "numbers = list(range(0, 1000, 3))"
+        self._run("sum([num for num in numbers])", setup_code, repeat=3)
+
+    def test_benchmark_timer(self):
+        import time
+        setup_code = "numbers = list(range(0, 1000, 3))"
+        timings = self._run("sum([num for num in numbers])", setup_code, timer=time.perf_counter, repeat=3)
+
+        for timing in timings:
+            self.assertIsInstance(timing, float)
+
+    def test_benchmark_timer_ns(self):
+        import time
+        setup_code = "numbers = list(range(0, 1000, 3))"
+        timings = self._run("sum([num for num in numbers])", setup_code, timer=time.perf_counter_ns, repeat=3)
+
+        for timing in timings:
+            self.assertIsInstance(timing, int)
+
+    def test_benchmark_multiline_setup(self):
+        setup_code = """
+        numbers = list(range(0, 100, 3))
+
+        def csum(numbers):
+            result = 0
+            for number in numbers:
+                result += number
+            return result
+        """
+        self._run("csum(numbers)", setup_code)
+
+    def test_benchmark_multiline_code(self):
+        setup_code = "numbers = list(range(0, 100, 3))"
+        self._run("""
+            sum([
+                num
+                    for num in numbers
+                ])
+            """,
+            setup_code,
+            repeat=3
+        )
+
+    def test_benchmark_in_module(self):
+        self._run("fsum(range(100))", import_module='math', repeat=2)

venv/lib/python3.10/site-packages/Cython/Build/Tests/TestIpythonMagic.py

@@ -0,0 +1,287 @@
+# tag: ipython
+
+"""Tests for the Cython magics extension."""
+
+
+import os
+import io
+import sys
+from contextlib import contextmanager
+from unittest import skipIf
+
+from Cython.Build import IpythonMagic
+from Cython.TestUtils import CythonTest
+from Cython.Compiler.Annotate import AnnotationCCodeWriter
+
+try:
+    import IPython.testing.globalipapp
+except ImportError:
+    # Disable tests and fake helpers for initialisation below.
+    def skip_if_not_installed(_):
+        return None
+else:
+    def skip_if_not_installed(c):
+        return c
+
+# not using IPython's decorators here because they depend on "nose"
+skip_win32 = skipIf(sys.platform == 'win32', "Skip on Windows")
+
+try:
+    # disable IPython history thread before it gets started to avoid having to clean it up
+    from IPython.core.history import HistoryManager
+    HistoryManager.enabled = False
+except ImportError:
+    pass
+
+
+@contextmanager
+def capture_output():
+    backup = sys.stdout, sys.stderr
+    try:
+        replacement = [
+             io.TextIOWrapper(io.BytesIO(), encoding=sys.stdout.encoding),
+             io.TextIOWrapper(io.BytesIO(), encoding=sys.stderr.encoding),
+        ]
+        sys.stdout, sys.stderr = replacement
+        output = []
+        yield output
+    finally:
+        sys.stdout, sys.stderr = backup
+        for wrapper in replacement:
+            wrapper.seek(0)  # rewind
+            output.append(wrapper.read())
+            wrapper.close()
+
+
+code = """\
+def f(x):
+    return 2*x
+"""
+
+cython3_code = """\
+def f(int x):
+    return 2 / x
+
+def call(x):
+    return f(*(x,))
+"""
+
+pgo_cython3_code = cython3_code + """\
+def main():
+    for _ in range(100): call(5)
+main()
+"""
+
+compile_error_code = '''\
+cdef extern from *:
+    """
+    xxx a=1;
+    """
+    int a;
+def doit():
+    return a
+'''
+
+compile_warning_code = '''\
+cdef extern from *:
+    """
+    #pragma message ( "CWarning" )
+    int a = 42;
+    """
+    int a;
+def doit():
+    return a
+'''
+
+
+@skip_if_not_installed
+class TestIPythonMagic(CythonTest):
+
+    @classmethod
+    def setUpClass(cls):
+        CythonTest.setUpClass()
+        cls._ip = IPython.testing.globalipapp.get_ipython()
+
+    def setUp(self):
+        CythonTest.setUp(self)
+        self._ip.extension_manager.load_extension('cython')
+
+    def test_cython_inline(self):
+        ip = self._ip
+        ip.ex('a=10; b=20')
+        result = ip.run_cell_magic('cython_inline', '', 'return a+b')
+        self.assertEqual(result, 30)
+
+    @skip_win32
+    def test_cython_pyximport(self):
+        ip = self._ip
+        module_name = '_test_cython_pyximport'
+        ip.run_cell_magic('cython_pyximport', module_name, code)
+        ip.ex('g = f(10)')
+        self.assertEqual(ip.user_ns['g'], 20.0)
+        ip.run_cell_magic('cython_pyximport', module_name, code)
+        ip.ex('h = f(-10)')
+        self.assertEqual(ip.user_ns['h'], -20.0)
+        try:
+            os.remove(module_name + '.pyx')
+        except OSError:
+            pass
+
+    def test_cython(self):
+        ip = self._ip
+        ip.run_cell_magic('cython', '', code)
+        ip.ex('g = f(10)')
+        self.assertEqual(ip.user_ns['g'], 20.0)
+
+    def test_cython_name(self):
+        # The Cython module named 'mymodule' defines the function f.
+        ip = self._ip
+        ip.run_cell_magic('cython', '--name=mymodule', code)
+        # This module can now be imported in the interactive namespace.
+        ip.ex('import mymodule; g = mymodule.f(10)')
+        self.assertEqual(ip.user_ns['g'], 20.0)
+
+    def test_cython_language_level(self):
+        # The Cython cell defines the functions f() and call().
+        ip = self._ip
+        ip.run_cell_magic('cython', '', cython3_code)
+        ip.ex('g = f(10); h = call(10)')
+        self.assertEqual(ip.user_ns['g'], 2.0 / 10.0)
+        self.assertEqual(ip.user_ns['h'], 2.0 / 10.0)
+
+    def test_cython3(self):
+        # The Cython cell defines the functions f() and call().
+        ip = self._ip
+        ip.run_cell_magic('cython', '-3', cython3_code)
+        ip.ex('g = f(10); h = call(10)')
+        self.assertEqual(ip.user_ns['g'], 2.0 / 10.0)
+        self.assertEqual(ip.user_ns['h'], 2.0 / 10.0)
+
+    def test_cython2(self):
+        # The Cython cell defines the functions f() and call().
+        ip = self._ip
+        ip.run_cell_magic('cython', '-2', cython3_code)
+        ip.ex('g = f(10); h = call(10)')
+        self.assertEqual(ip.user_ns['g'], 2 // 10)
+        self.assertEqual(ip.user_ns['h'], 2 // 10)
+
+    def test_cython_compile_error_shown(self):
+        ip = self._ip
+        with capture_output() as out:
+            ip.run_cell_magic('cython', '-3', compile_error_code)
+        captured_out, captured_err = out
+
+        # it could be that c-level output is captured by distutil-extension
+        # (and not by us) and is printed to stdout:
+        captured_all = captured_out + "\n" + captured_err
+        self.assertTrue("error" in captured_all, msg="error in " + captured_all)
+
+    def test_cython_link_error_shown(self):
+        ip = self._ip
+        with capture_output() as out:
+            ip.run_cell_magic('cython', '-3 -l=xxxxxxxx', code)
+        captured_out, captured_err = out
+
+        # it could be that c-level output is captured by distutil-extension
+        # (and not by us) and is printed to stdout:
+        captured_all = captured_out + "\n!" + captured_err
+        self.assertTrue("error" in captured_all, msg="error in " + captured_all)
+
+    def test_cython_warning_shown(self):
+        ip = self._ip
+        with capture_output() as out:
+            # force rebuild, otherwise no warning as after the first success
+            # no build step is performed
+            ip.run_cell_magic('cython', '-3 -f', compile_warning_code)
+        captured_out, captured_err = out
+
+        # check that warning was printed to stdout even if build hasn't failed
+        self.assertTrue("CWarning" in captured_out)
+
+    @skip_win32
+    def test_cython3_pgo(self):
+        # The Cython cell defines the functions f() and call().
+        ip = self._ip
+        ip.run_cell_magic('cython', '-3 --pgo', pgo_cython3_code)
+        ip.ex('g = f(10); h = call(10); main()')
+        self.assertEqual(ip.user_ns['g'], 2.0 / 10.0)
+        self.assertEqual(ip.user_ns['h'], 2.0 / 10.0)
+
+    @skip_win32
+    def test_extlibs(self):
+        ip = self._ip
+        code = """
+from libc.math cimport sin
+x = sin(0.0)
+        """
+        ip.user_ns['x'] = 1
+        ip.run_cell_magic('cython', '-l m', code)
+        self.assertEqual(ip.user_ns['x'], 0)
+
+
+    def test_cython_verbose(self):
+        ip = self._ip
+        ip.run_cell_magic('cython', '--verbose', code)
+        ip.ex('g = f(10)')
+        self.assertEqual(ip.user_ns['g'], 20.0)
+
+    def test_cython_verbose_thresholds(self):
+        @contextmanager
+        def mock_distutils():
+            class MockLog:
+                DEBUG = 1
+                INFO = 2
+                thresholds = [INFO]
+
+                def set_threshold(self, val):
+                    self.thresholds.append(val)
+                    return self.thresholds[-2]
+
+
+            new_log = MockLog()
+            old_log = IpythonMagic.distutils.log
+            try:
+                IpythonMagic.distutils.log = new_log
+                yield new_log
+            finally:
+                IpythonMagic.distutils.log = old_log
+
+        ip = self._ip
+        with mock_distutils() as verbose_log:
+            ip.run_cell_magic('cython', '--verbose', code)
+            ip.ex('g = f(10)')
+        self.assertEqual(ip.user_ns['g'], 20.0)
+        self.assertEqual([verbose_log.INFO, verbose_log.DEBUG, verbose_log.INFO],
+                          verbose_log.thresholds)
+
+        with mock_distutils() as normal_log:
+            ip.run_cell_magic('cython', '', code)
+            ip.ex('g = f(10)')
+        self.assertEqual(ip.user_ns['g'], 20.0)
+        self.assertEqual([normal_log.INFO], normal_log.thresholds)
+
+    def test_cython_no_annotate(self):
+        ip = self._ip
+        html = ip.run_cell_magic('cython', '', code)
+        self.assertTrue(html is None)
+
+    def test_cython_annotate(self):
+        ip = self._ip
+        html = ip.run_cell_magic('cython', '--annotate', code)
+        # somewhat brittle way to differentiate between annotated htmls
+        # with/without complete source code:
+        self.assertTrue(AnnotationCCodeWriter.COMPLETE_CODE_TITLE not in html.data)
+
+    def test_cython_annotate_default(self):
+        ip = self._ip
+        html = ip.run_cell_magic('cython', '-a', code)
+        # somewhat brittle way to differentiate between annotated htmls
+        # with/without complete source code:
+        self.assertTrue(AnnotationCCodeWriter.COMPLETE_CODE_TITLE not in html.data)
+
+    def test_cython_annotate_complete_c_code(self):
+        ip = self._ip
+        html = ip.run_cell_magic('cython', '--annotate-fullc', code)
+        # somewhat brittle way to differentiate between annotated htmls
+        # with/without complete source code:
+        self.assertTrue(AnnotationCCodeWriter.COMPLETE_CODE_TITLE in html.data)

venv/lib/python3.10/site-packages/Cython/Build/Tests/TestRecythonize.py

@@ -0,0 +1,212 @@
+import shutil
+import os
+import tempfile
+import time
+
+import Cython.Build.Dependencies
+import Cython.Utils
+from Cython.TestUtils import CythonTest
+
+
+def fresh_cythonize(*args, **kwargs):
+    Cython.Utils.clear_function_caches()
+    Cython.Build.Dependencies._dep_tree = None  # discard method caches
+    Cython.Build.Dependencies.cythonize(*args, **kwargs)
+
+class TestRecythonize(CythonTest):
+
+    def setUp(self):
+        CythonTest.setUp(self)
+        self.temp_dir = (
+            tempfile.mkdtemp(
+                prefix='recythonize-test',
+                dir='TEST_TMP' if os.path.isdir('TEST_TMP') else None
+            )
+        )
+
+    def tearDown(self):
+        CythonTest.tearDown(self)
+        shutil.rmtree(self.temp_dir)
+
+    def test_recythonize_pyx_on_pxd_change(self):
+
+        src_dir = tempfile.mkdtemp(prefix='src', dir=self.temp_dir)
+
+        a_pxd = os.path.join(src_dir, 'a.pxd')
+        a_pyx = os.path.join(src_dir, 'a.pyx')
+        a_c = os.path.join(src_dir, 'a.c')
+        dep_tree = Cython.Build.Dependencies.create_dependency_tree()
+
+        with open(a_pxd, 'w') as f:
+            f.write('cdef int value\n')
+
+        with open(a_pyx, 'w') as f:
+            f.write('value = 1\n')
+
+
+        # The dependencies for "a.pyx" are "a.pxd" and "a.pyx".
+        self.assertEqual({a_pxd, a_pyx}, dep_tree.all_dependencies(a_pyx))
+
+        # Cythonize to create a.c
+        fresh_cythonize(a_pyx)
+
+        # Sleep to address coarse time-stamp precision.
+        time.sleep(1)
+
+        with open(a_c) as f:
+            a_c_contents1 = f.read()
+
+        with open(a_pxd, 'w') as f:
+            f.write('cdef double value\n')
+
+        fresh_cythonize(a_pyx)
+
+        with open(a_c) as f:
+            a_c_contents2 = f.read()
+
+        self.assertTrue("__pyx_v_1a_value = 1;" in a_c_contents1)
+        self.assertFalse("__pyx_v_1a_value = 1;" in a_c_contents2)
+        self.assertTrue("__pyx_v_1a_value = 1.0;" in a_c_contents2)
+        self.assertFalse("__pyx_v_1a_value = 1.0;" in a_c_contents1)
+
+
+    def test_recythonize_py_on_pxd_change(self):
+
+        src_dir = tempfile.mkdtemp(prefix='src', dir=self.temp_dir)
+
+        a_pxd = os.path.join(src_dir, 'a.pxd')
+        a_py = os.path.join(src_dir, 'a.py')
+        a_c = os.path.join(src_dir, 'a.c')
+        dep_tree = Cython.Build.Dependencies.create_dependency_tree()
+
+        with open(a_pxd, 'w') as f:
+            f.write('cdef int value\n')
+
+        with open(a_py, 'w') as f:
+            f.write('value = 1\n')
+
+
+        # The dependencies for "a.py" are "a.pxd" and "a.py".
+        self.assertEqual({a_pxd, a_py}, dep_tree.all_dependencies(a_py))
+
+        # Cythonize to create a.c
+        fresh_cythonize(a_py)
+
+        # Sleep to address coarse time-stamp precision.
+        time.sleep(1)
+
+        with open(a_c) as f:
+            a_c_contents1 = f.read()
+
+        with open(a_pxd, 'w') as f:
+            f.write('cdef double value\n')
+
+        fresh_cythonize(a_py)
+
+        with open(a_c) as f:
+            a_c_contents2 = f.read()
+
+
+        self.assertTrue("__pyx_v_1a_value = 1;" in a_c_contents1)
+        self.assertFalse("__pyx_v_1a_value = 1;" in a_c_contents2)
+        self.assertTrue("__pyx_v_1a_value = 1.0;" in a_c_contents2)
+        self.assertFalse("__pyx_v_1a_value = 1.0;" in a_c_contents1)
+
+    def test_recythonize_pyx_on_dep_pxd_change(self):
+        src_dir = tempfile.mkdtemp(prefix='src', dir=self.temp_dir)
+
+        a_pxd = os.path.join(src_dir, 'a.pxd')
+        a_pyx = os.path.join(src_dir, 'a.pyx')
+        b_pyx = os.path.join(src_dir, 'b.pyx')
+        b_c = os.path.join(src_dir, 'b.c')
+        dep_tree = Cython.Build.Dependencies.create_dependency_tree()
+
+        with open(a_pxd, 'w') as f:
+            f.write('cdef int value\n')
+
+        with open(a_pyx, 'w') as f:
+            f.write('value = 1\n')
+
+        with open(b_pyx, 'w') as f:
+            f.write('cimport a\n' + 'a.value = 2\n')
+
+
+        # The dependencies for "b.pyx" are "a.pxd" and "b.pyx".
+        self.assertEqual({a_pxd, b_pyx}, dep_tree.all_dependencies(b_pyx))
+
+
+        # Cythonize to create b.c
+        fresh_cythonize([a_pyx, b_pyx])
+
+        # Sleep to address coarse time-stamp precision.
+        time.sleep(1)
+
+        with open(b_c) as f:
+            b_c_contents1 = f.read()
+
+        with open(a_pxd, 'w') as f:
+            f.write('cdef double value\n')
+
+        fresh_cythonize([a_pyx, b_pyx])
+
+        with open(b_c) as f:
+            b_c_contents2 = f.read()
+
+
+
+        self.assertTrue("__pyx_v_1a_value = 2;" in b_c_contents1)
+        self.assertFalse("__pyx_v_1a_value = 2;" in b_c_contents2)
+        self.assertTrue("__pyx_v_1a_value = 2.0;" in b_c_contents2)
+        self.assertFalse("__pyx_v_1a_value = 2.0;" in b_c_contents1)
+
+
+
+    def test_recythonize_py_on_dep_pxd_change(self):
+
+        src_dir = tempfile.mkdtemp(prefix='src', dir=self.temp_dir)
+
+        a_pxd = os.path.join(src_dir, 'a.pxd')
+        a_pyx = os.path.join(src_dir, 'a.pyx')
+        b_pxd = os.path.join(src_dir, 'b.pxd')
+        b_py = os.path.join(src_dir, 'b.py')
+        b_c = os.path.join(src_dir, 'b.c')
+        dep_tree = Cython.Build.Dependencies.create_dependency_tree()
+
+        with open(a_pxd, 'w') as f:
+            f.write('cdef int value\n')
+
+        with open(a_pyx, 'w') as f:
+            f.write('value = 1\n')
+
+        with open(b_pxd, 'w') as f:
+            f.write('cimport a\n')
+
+        with open(b_py, 'w') as f:
+            f.write('a.value = 2\n')
+
+
+        # The dependencies for b.py are "a.pxd", "b.pxd" and "b.py".
+        self.assertEqual({a_pxd, b_pxd, b_py}, dep_tree.all_dependencies(b_py))
+
+
+        # Cythonize to create b.c
+        fresh_cythonize([a_pyx, b_py])
+
+        # Sleep to address coarse time-stamp precision.
+        time.sleep(1)
+
+        with open(b_c) as f:
+            b_c_contents1 = f.read()
+
+        with open(a_pxd, 'w') as f:
+            f.write('cdef double value\n')
+
+        fresh_cythonize([a_pyx, b_py])
+
+        with open(b_c) as f:
+            b_c_contents2 = f.read()
+
+        self.assertTrue("__pyx_v_1a_value = 2;" in b_c_contents1)
+        self.assertFalse("__pyx_v_1a_value = 2;" in b_c_contents2)
+        self.assertTrue("__pyx_v_1a_value = 2.0;" in b_c_contents2)
+        self.assertFalse("__pyx_v_1a_value = 2.0;" in b_c_contents1)

venv/lib/python3.10/site-packages/Cython/Build/Tests/TestStripLiterals.py

@@ -0,0 +1,155 @@
+import pathlib
+import re
+import unittest
+
+from ...Utils import open_source_file
+from ..Dependencies import strip_string_literals
+
+
+class TestStripLiterals(unittest.TestCase):
+    maxDiff = None
+
+    @staticmethod
+    def _rebuild_string(stripped, literals):
+        def lookup(match):
+            return literals[match.group()]
+
+        return re.sub("__Pyx_L[0-9]+_", lookup, stripped)
+
+    def test_strip_string_literals(self):
+        def strip_equals(s, expected):
+            stripped, literals = strip_string_literals(s)
+            self.assertEqual(expected, stripped)
+
+            recovered = self._rebuild_string(stripped, literals)
+            self.assertEqual(s, recovered)
+
+        unchanged = [
+            "",
+            """abc""",
+            """123""",
+            """func(123)""",
+            """ '' """,
+            """ '''''''''''' """,
+            """ '''''''''''''' """,
+        ]
+
+        tests = [(code, code) for code in unchanged] + [
+            # strings and quotes
+            ('"x"',
+             '"__Pyx_L1_"'),
+            ("'x'",
+             "'__Pyx_L1_'"),
+            (""" '"' "'" """,
+             """ '__Pyx_L1_' "__Pyx_L2_" """),
+            (""" '''' ''' """,
+             """ '''__Pyx_L1_''' """),
+            (''' """" """ ''',
+             ''' """__Pyx_L1_""" '''),
+            (" '''a\n''' ",
+             " '''__Pyx_L1_''' "),
+
+            # escapes
+            (r"'a\'b'",
+             "'__Pyx_L1_'"),
+            (r"'a\\'",
+             "'__Pyx_L1_'"),
+            (r"'a\\\'b'",
+             "'__Pyx_L1_'"),
+
+            # string prefixes
+            ("u'abc'",
+             "u'__Pyx_L1_'"),
+            (r"r'abc\\'",
+             "r'__Pyx_L1_'"),
+            (r"ru'abc\\'",
+             "ru'__Pyx_L1_'"),
+
+            # comments
+            ("abc # foo",
+             "abc #__Pyx_L1_"),
+            ("abc # 'x'",
+             "abc #__Pyx_L1_"),
+            ("'abc#'",
+             "'__Pyx_L1_'"),
+
+            # special commands
+            ("include 'a.pxi' # something here",
+             "include '__Pyx_L1_' #__Pyx_L2_"),
+            ("cdef extern from 'a.h': # comment",
+             "cdef extern from '__Pyx_L1_': #__Pyx_L2_"),
+
+            # mixed strings
+            (""" func('xyz') + " " + "" '' # '' | "" "123" 'xyz' "' """,
+             """ func('__Pyx_L1_') + "__Pyx_L2_" + "" '' #__Pyx_L3_"""),
+
+            (""" f'f' """,
+             """ f'__Pyx_L1_' """),
+
+            (""" f'a{123}b' """,
+             """ f'__Pyx_L1_{123}__Pyx_L2_' """),
+
+            (""" f'{1}{f'xyz'}' """,
+             """ f'{1}{f'__Pyx_L1_'}' """),
+
+            (""" f'{f'''xyz{f\"""abc\"""}'''}' """,
+             """ f'{f'''__Pyx_L1_{f\"""__Pyx_L2_\"""}'''}' """),
+
+            (""" f'{{{{{"abc"}}}}}{{}}{{' == '{{abc}}{}{' """,
+             """ f'__Pyx_L1_{"__Pyx_L2_"}__Pyx_L3_' == '__Pyx_L4_' """),
+
+            ("f'" + ('{x} ' * 250) + "{x:{width}} '",
+             "f'" + ''.join([f'{{x}}__Pyx_L{n}_' for n in range(1, 251)]) + "{x:{width}}__Pyx_L251_'")
+        ]
+
+        for code, expected in tests:
+            with self.subTest(code=code):
+                strip_equals(code, expected)  # plain
+            code = code.strip()
+            expected = expected.strip()
+            with self.subTest(code=code):
+                strip_equals(code, expected)  # stripped
+            code += "\n"
+            expected += "\n"
+            with self.subTest(code=code):
+                strip_equals(code, expected)  # +EOL
+
+        # GH-5977: unclosed string literal
+        strip_equals(
+            """ print("Say something: %s' % something) """,
+            """ print("__Pyx_L1_"""
+        )
+
+    def _test_all_files(self, base_dir, file_paths):
+        _find_leftover_string = re.compile(r"""[^_'"}](['"]+)[^_'"{]""").search
+        for file_path in sorted(file_paths):
+            with self.subTest(file=str(file_path.relative_to(base_dir))):
+                with open_source_file(str(file_path)) as f:
+                    code = f.read()
+                stripped, literals = strip_string_literals(code)
+
+                match = _find_leftover_string(stripped)
+                if match and len(match.group(1)) != 2:
+                    match_pos = match.start() + 1
+                    self.fail(f"Leftover string found: {stripped[match_pos - 12 : match_pos + 12]!r}")
+
+                recovered = self._rebuild_string(stripped, literals)
+                self.assertEqual(code, recovered)
+
+    def test_strip_string_literals_py_files(self):
+        # process all .py files in the Cython package
+        package_dir = pathlib.Path(__file__).absolute().parents[2]
+        assert package_dir.name == 'Cython'
+        base_dir = package_dir.parent
+        self._test_all_files(base_dir, package_dir.rglob("*.py"))
+
+    def test_strip_string_literals_test_files(self):
+        # process all .py[x] files in the tests package
+        base_dir = pathlib.Path(__file__).absolute().parents[3]
+        tests_dir = base_dir / 'tests'
+        test_files = []
+        for test_subdir in tests_dir.iterdir():
+            if test_subdir.is_dir() and test_subdir.name != 'errors':
+                test_files.extend(test_subdir.rglob("*.py"))
+                test_files.extend(test_subdir.rglob("*.pyx"))
+        self._test_all_files(base_dir, test_files)

venv/lib/python3.10/site-packages/Cython/Build/Tests/__init__.py

@@ -0,0 +1 @@
+# empty file

venv/lib/python3.10/site-packages/Cython/Build/__init__.py

@@ -0,0 +1,11 @@
+from .Dependencies import cythonize
+
+__all__ = ["cythonize"]
+
+
+def __getattr__(name):
+    if name == 'build_ext':
+        # Lazy import, fails if distutils is not available (in Python 3.12+).
+        from .Distutils import build_ext
+        return build_ext
+    raise AttributeError("module '%s' has no attribute '%s'" % (__name__, name))

venv/lib/python3.10/site-packages/Cython/CodeWriter.py

@@ -0,0 +1,811 @@
+"""
+Serializes a Cython code tree to Cython code. This is primarily useful for
+debugging and testing purposes.
+The output is in a strict format, no whitespace or comments from the input
+is preserved (and it could not be as it is not present in the code tree).
+"""
+
+
+from .Compiler.Visitor import TreeVisitor
+from .Compiler.ExprNodes import *
+from .Compiler.Nodes import CSimpleBaseTypeNode
+
+
+class LinesResult:
+    def __init__(self):
+        self.lines = []
+        self.s = ""
+
+    def put(self, s):
+        self.s += s
+
+    def newline(self):
+        self.lines.append(self.s)
+        self.s = ""
+
+    def putline(self, s):
+        self.put(s)
+        self.newline()
+
+
+class DeclarationWriter(TreeVisitor):
+    """
+    A Cython code writer that is limited to declarations nodes.
+    """
+
+    indent_string = "    "
+
+    def __init__(self, result=None):
+        super().__init__()
+        if result is None:
+            result = LinesResult()
+        self.result = result
+        self.numindents = 0
+        self.tempnames = {}
+        self.tempblockindex = 0
+
+    def write(self, tree):
+        self.visit(tree)
+        return self.result
+
+    def indent(self):
+        self.numindents += 1
+
+    def dedent(self):
+        self.numindents -= 1
+
+    def startline(self, s=""):
+        self.result.put(self.indent_string * self.numindents + s)
+
+    def put(self, s):
+        self.result.put(s)
+
+    def putline(self, s):
+        self.result.putline(self.indent_string * self.numindents + s)
+
+    def endline(self, s=""):
+        self.result.putline(s)
+
+    def line(self, s):
+        self.startline(s)
+        self.endline()
+
+    def comma_separated_list(self, items, output_rhs=False):
+        if len(items) > 0:
+            for item in items[:-1]:
+                self.visit(item)
+                if output_rhs and item.default is not None:
+                    self.put(" = ")
+                    self.visit(item.default)
+                self.put(", ")
+            self.visit(items[-1])
+            if output_rhs and items[-1].default is not None:
+                self.put(" = ")
+                self.visit(items[-1].default)
+
+    def _visit_indented(self, node):
+        self.indent()
+        self.visit(node)
+        self.dedent()
+
+    def visit_Node(self, node):
+        raise AssertionError("Node not handled by serializer: %r" % node)
+
+    def visit_ModuleNode(self, node):
+        self.visitchildren(node)
+
+    def visit_StatListNode(self, node):
+        self.visitchildren(node)
+
+    def visit_CDefExternNode(self, node):
+        if node.include_file is None:
+            file = '*'
+        else:
+            file = '"%s"' % node.include_file
+        self.putline("cdef extern from %s:" % file)
+        self._visit_indented(node.body)
+
+    def visit_CPtrDeclaratorNode(self, node):
+        self.put('*')
+        self.visit(node.base)
+
+    def visit_CReferenceDeclaratorNode(self, node):
+        self.put('&')
+        self.visit(node.base)
+
+    def visit_CArrayDeclaratorNode(self, node):
+        self.visit(node.base)
+        self.put('[')
+        if node.dimension is not None:
+            self.visit(node.dimension)
+        self.put(']')
+
+    def visit_CFuncDeclaratorNode(self, node):
+        # TODO: except, gil, etc.
+        self.visit(node.base)
+        self.put('(')
+        self.comma_separated_list(node.args)
+        self.endline(')')
+
+    def visit_CNameDeclaratorNode(self, node):
+        self.put(node.name)
+
+    def visit_CSimpleBaseTypeNode(self, node):
+        # See Parsing.p_sign_and_longness
+        if node.is_basic_c_type:
+            self.put(("unsigned ", "", "signed ")[node.signed])
+            if node.longness < 0:
+                self.put("short " * -node.longness)
+            elif node.longness > 0:
+                self.put("long " * node.longness)
+        if node.name is not None:
+            self.put(node.name)
+
+    def visit_CComplexBaseTypeNode(self, node):
+        self.visit(node.base_type)
+        self.visit(node.declarator)
+
+    def visit_CNestedBaseTypeNode(self, node):
+        self.visit(node.base_type)
+        self.put('.')
+        self.put(node.name)
+
+    def visit_TemplatedTypeNode(self, node):
+        self.visit(node.base_type_node)
+        self.put('[')
+        self.comma_separated_list(node.positional_args + node.keyword_args.key_value_pairs)
+        self.put(']')
+
+    def visit_CVarDefNode(self, node):
+        self.startline("cdef ")
+        self.visit(node.base_type)
+        self.put(" ")
+        self.comma_separated_list(node.declarators, output_rhs=True)
+        self.endline()
+
+    def _visit_container_node(self, node, decl, extras, attributes):
+        # TODO: visibility
+        self.startline(decl)
+        if node.name:
+            self.put(' ')
+            self.put(node.name)
+            if node.cname is not None:
+                self.put(' "%s"' % node.cname)
+        if extras:
+            self.put(extras)
+        self.endline(':')
+        self.indent()
+        if not attributes:
+            self.putline('pass')
+        else:
+            for attribute in attributes:
+                self.visit(attribute)
+        self.dedent()
+
+    def visit_CStructOrUnionDefNode(self, node):
+        if node.typedef_flag:
+            decl = 'ctypedef '
+        else:
+            decl = 'cdef '
+        if node.visibility == 'public':
+            decl += 'public '
+        if node.packed:
+            decl += 'packed '
+        decl += node.kind
+        self._visit_container_node(node, decl, None, node.attributes)
+
+    def visit_CppClassNode(self, node):
+        extras = ""
+        if node.templates:
+            extras = "[%s]" % ", ".join(node.templates)
+        if node.base_classes:
+            extras += "(%s)" % ", ".join(node.base_classes)
+        self._visit_container_node(node, "cdef cppclass", extras, node.attributes)
+
+    def visit_CEnumDefNode(self, node):
+        self._visit_container_node(node, "cdef enum", None, node.items)
+
+    def visit_CEnumDefItemNode(self, node):
+        self.startline(node.name)
+        if node.cname:
+            self.put(' "%s"' % node.cname)
+        if node.value:
+            self.put(" = ")
+            self.visit(node.value)
+        self.endline()
+
+    def visit_CClassDefNode(self, node):
+        assert not node.module_name
+        if node.decorators:
+            for decorator in node.decorators:
+                self.visit(decorator)
+        self.startline("cdef class ")
+        self.put(node.class_name)
+        if node.base_class_name:
+            self.put("(")
+            if node.base_class_module:
+                self.put(node.base_class_module)
+                self.put(".")
+            self.put(node.base_class_name)
+            self.put(")")
+        self.endline(":")
+        self._visit_indented(node.body)
+
+    def visit_CTypeDefNode(self, node):
+        self.startline("ctypedef ")
+        self.visit(node.base_type)
+        self.put(" ")
+        self.visit(node.declarator)
+        self.endline()
+
+    def visit_FuncDefNode(self, node):
+        # TODO: support cdef + cpdef functions
+        self.startline("def %s(" % node.name)
+        self.comma_separated_list(node.args)
+        self.endline("):")
+        self._visit_indented(node.body)
+
+    def visit_CFuncDefNode(self, node):
+        self.startline('cpdef ' if node.overridable else 'cdef ')
+        if node.modifiers:
+            self.put(' '.join(node.modifiers))
+            self.put(' ')
+        if node.visibility != 'private':
+            self.put(node.visibility)
+            self.put(' ')
+        if node.api:
+            self.put('api ')
+
+        if node.base_type:
+            self.visit(node.base_type)
+            if node.base_type.name is not None:
+                self.put(' ')
+
+        # visit the CFuncDeclaratorNode, but put a `:` at the end of line
+        self.visit(node.declarator.base)
+        self.put('(')
+        self.comma_separated_list(node.declarator.args)
+        self.endline('):')
+
+        self._visit_indented(node.body)
+
+    def visit_CArgDeclNode(self, node):
+        # For "CSimpleBaseTypeNode", the variable type may have been parsed as type.
+        # For other node types, the "name" is always None.
+        if not isinstance(node.base_type, CSimpleBaseTypeNode) or \
+                node.base_type.name is not None:
+            self.visit(node.base_type)
+
+            # If we printed something for "node.base_type", we may need to print an extra ' '.
+            #
+            # Special case: if "node.declarator" is a "CNameDeclaratorNode",
+            # its "name" might be an empty string, for example, for "cdef f(x)".
+            if node.declarator.declared_name():
+                self.put(" ")
+        self.visit(node.declarator)
+        if node.default is not None:
+            self.put(" = ")
+            self.visit(node.default)
+
+    def visit_CImportStatNode(self, node):
+        self.startline("cimport ")
+        self.put(node.module_name)
+        if node.as_name:
+            self.put(" as ")
+            self.put(node.as_name)
+        self.endline()
+
+    def visit_FromCImportStatNode(self, node):
+        self.startline("from ")
+        self.put(node.module_name)
+        self.put(" cimport ")
+        first = True
+        for pos, name, as_name, kind in node.imported_names:
+            assert kind is None
+            if first:
+                first = False
+            else:
+                self.put(", ")
+            self.put(name)
+            if as_name:
+                self.put(" as ")
+                self.put(as_name)
+        self.endline()
+
+    def visit_NameNode(self, node):
+        self.put(node.name)
+
+    def visit_DecoratorNode(self, node):
+        self.startline("@")
+        self.visit(node.decorator)
+        self.endline()
+
+    def visit_PassStatNode(self, node):
+        self.startline("pass")
+        self.endline()
+
+
+class StatementWriter(DeclarationWriter):
+    """
+    A Cython code writer for most language statement features.
+    """
+
+    def visit_SingleAssignmentNode(self, node):
+        self.startline()
+        self.visit(node.lhs)
+        self.put(" = ")
+        self.visit(node.rhs)
+        self.endline()
+
+    def visit_CascadedAssignmentNode(self, node):
+        self.startline()
+        for lhs in node.lhs_list:
+            self.visit(lhs)
+            self.put(" = ")
+        self.visit(node.rhs)
+        self.endline()
+
+    def visit_PrintStatNode(self, node):
+        self.startline("print ")
+        self.comma_separated_list(node.arg_tuple.args)
+        if not node.append_newline:
+            self.put(",")
+        self.endline()
+
+    def visit_ForInStatNode(self, node):
+        self.startline("for ")
+        if node.target.is_sequence_constructor:
+            self.comma_separated_list(node.target.args)
+        else:
+            self.visit(node.target)
+        self.put(" in ")
+        self.visit(node.iterator.sequence)
+        self.endline(":")
+        self._visit_indented(node.body)
+        if node.else_clause is not None:
+            self.line("else:")
+            self._visit_indented(node.else_clause)
+
+    def visit_IfStatNode(self, node):
+        # The IfClauseNode is handled directly without a separate match
+        # for clariy.
+        self.startline("if ")
+        self.visit(node.if_clauses[0].condition)
+        self.endline(":")
+        self._visit_indented(node.if_clauses[0].body)
+        for clause in node.if_clauses[1:]:
+            self.startline("elif ")
+            self.visit(clause.condition)
+            self.endline(":")
+            self._visit_indented(clause.body)
+        if node.else_clause is not None:
+            self.line("else:")
+            self._visit_indented(node.else_clause)
+
+    def visit_WhileStatNode(self, node):
+        self.startline("while ")
+        self.visit(node.condition)
+        self.endline(":")
+        self._visit_indented(node.body)
+        if node.else_clause is not None:
+            self.line("else:")
+            self._visit_indented(node.else_clause)
+
+    def visit_ContinueStatNode(self, node):
+        self.line("continue")
+
+    def visit_BreakStatNode(self, node):
+        self.line("break")
+
+    def visit_SequenceNode(self, node):
+        self.comma_separated_list(node.args)  # Might need to discover whether we need () around tuples...hmm...
+
+    def visit_ExprStatNode(self, node):
+        self.startline()
+        self.visit(node.expr)
+        self.endline()
+
+    def visit_InPlaceAssignmentNode(self, node):
+        self.startline()
+        self.visit(node.lhs)
+        self.put(" %s= " % node.operator)
+        self.visit(node.rhs)
+        self.endline()
+
+    def visit_WithStatNode(self, node):
+        self.startline()
+        self.put("with ")
+        self.visit(node.manager)
+        if node.target is not None:
+            self.put(" as ")
+            self.visit(node.target)
+        self.endline(":")
+        self._visit_indented(node.body)
+
+    def visit_TryFinallyStatNode(self, node):
+        self.line("try:")
+        self._visit_indented(node.body)
+        self.line("finally:")
+        self._visit_indented(node.finally_clause)
+
+    def visit_TryExceptStatNode(self, node):
+        self.line("try:")
+        self._visit_indented(node.body)
+        for x in node.except_clauses:
+            self.visit(x)
+        if node.else_clause is not None:
+            self.visit(node.else_clause)
+
+    def visit_ExceptClauseNode(self, node):
+        self.startline("except")
+        if node.pattern is not None:
+            self.put(" ")
+            self.visit(node.pattern)
+        if node.target is not None:
+            self.put(", ")
+            self.visit(node.target)
+        self.endline(":")
+        self._visit_indented(node.body)
+
+    def visit_ReturnStatNode(self, node):
+        self.startline("return")
+        if node.value is not None:
+            self.put(" ")
+            self.visit(node.value)
+        self.endline()
+
+    def visit_ReraiseStatNode(self, node):
+        self.line("raise")
+
+    def visit_ImportNode(self, node):
+        self.put("(import %s)" % node.module_name.value)
+
+    def visit_TempsBlockNode(self, node):
+        """
+        Temporaries are output like $1_1', where the first number is
+        an index of the TempsBlockNode and the second number is an index
+        of the temporary which that block allocates.
+        """
+        idx = 0
+        for handle in node.temps:
+            self.tempnames[handle] = "$%d_%d" % (self.tempblockindex, idx)
+            idx += 1
+        self.tempblockindex += 1
+        self.visit(node.body)
+
+    def visit_TempRefNode(self, node):
+        self.put(self.tempnames[node.handle])
+
+
+class ExpressionWriter(TreeVisitor):
+    """
+    A Cython code writer that is intentionally limited to expressions.
+    """
+
+    def __init__(self, result=None):
+        super().__init__()
+        if result is None:
+            result = ""
+        self.result = result
+        self.precedence = [0]
+
+    def write(self, tree):
+        self.visit(tree)
+        return self.result
+
+    def put(self, s):
+        self.result += s
+
+    def remove(self, s):
+        if self.result.endswith(s):
+            self.result = self.result[:-len(s)]
+
+    def comma_separated_list(self, items):
+        if len(items) > 0:
+            for item in items[:-1]:
+                self.visit(item)
+                self.put(", ")
+            self.visit(items[-1])
+
+    def visit_Node(self, node):
+        raise AssertionError("Node not handled by serializer: %r" % node)
+
+    # TODO: Remove redundancy below. Most constants serialise fine as just "repr(node.value)".
+
+    def visit_IntNode(self, node):
+        self.put(node.value)
+
+    def visit_FloatNode(self, node):
+        self.put(node.value)
+
+    def visit_NoneNode(self, node):
+        self.put("None")
+
+    def visit_NameNode(self, node):
+        self.put(node.name)
+
+    def visit_EllipsisNode(self, node):
+        self.put("...")
+
+    def visit_BoolNode(self, node):
+        self.put(str(node.value))
+
+    def visit_ConstNode(self, node):
+        self.put(str(node.value))
+
+    def visit_ImagNode(self, node):
+        self.put(f"{node.value}j")
+
+    def visit_BytesNode(self, node):
+        self.put(repr(node.value))
+
+    def visit_UnicodeNode(self, node):
+        self.put(repr(node.value))
+
+    def emit_sequence(self, node, parens=("", "")):
+        open_paren, close_paren = parens
+        items = node.subexpr_nodes()
+        self.put(open_paren)
+        self.comma_separated_list(items)
+        self.put(close_paren)
+
+    def visit_ListNode(self, node):
+        self.emit_sequence(node, "[]")
+
+    def visit_TupleNode(self, node):
+        self.emit_sequence(node, "()")
+
+    def visit_SetNode(self, node):
+        if len(node.subexpr_nodes()) > 0:
+            self.emit_sequence(node, "{}")
+        else:
+            self.put("set()")
+
+    def visit_DictNode(self, node):
+        self.emit_sequence(node, "{}")
+
+    def visit_DictItemNode(self, node):
+        self.visit(node.key)
+        self.put(": ")
+        self.visit(node.value)
+
+    unop_precedence = {
+        'not': 3, '!': 3,
+        '+': 11, '-': 11, '~': 11,
+    }
+    binop_precedence = {
+        'or': 1,
+        'and': 2,
+        # unary: 'not': 3, '!': 3,
+        'in': 4, 'not_in': 4, 'is': 4, 'is_not': 4, '<': 4, '<=': 4, '>': 4, '>=': 4, '!=': 4, '==': 4,
+        '|': 5,
+        '^': 6,
+        '&': 7,
+        '<<': 8, '>>': 8,
+        '+': 9, '-': 9,
+        '*': 10, '@': 10, '/': 10, '//': 10, '%': 10,
+        # unary: '+': 11, '-': 11, '~': 11
+        '**': 12,
+    }
+
+    def operator_enter(self, new_prec):
+        old_prec = self.precedence[-1]
+        if old_prec > new_prec:
+            self.put("(")
+        self.precedence.append(new_prec)
+
+    def operator_exit(self):
+        old_prec, new_prec = self.precedence[-2:]
+        if old_prec > new_prec:
+            self.put(")")
+        self.precedence.pop()
+
+    def visit_NotNode(self, node):
+        op = 'not'
+        prec = self.unop_precedence[op]
+        self.operator_enter(prec)
+        self.put("not ")
+        self.visit(node.operand)
+        self.operator_exit()
+
+    def visit_UnopNode(self, node):
+        op = node.operator
+        prec = self.unop_precedence[op]
+        self.operator_enter(prec)
+        self.put("%s" % node.operator)
+        self.visit(node.operand)
+        self.operator_exit()
+
+    def visit_BinopNode(self, node):
+        op = node.operator
+        prec = self.binop_precedence.get(op, 0)
+        self.operator_enter(prec)
+        self.visit(node.operand1)
+        self.put(" %s " % op.replace('_', ' '))
+        self.visit(node.operand2)
+        self.operator_exit()
+
+    def visit_BoolBinopNode(self, node):
+        self.visit_BinopNode(node)
+
+    def visit_PrimaryCmpNode(self, node):
+        self.visit_BinopNode(node)
+
+    def visit_IndexNode(self, node):
+        self.visit(node.base)
+        self.put("[")
+        if isinstance(node.index, TupleNode):
+            if node.index.subexpr_nodes():
+                self.emit_sequence(node.index)
+            else:
+                self.put("()")
+        else:
+            self.visit(node.index)
+        self.put("]")
+
+    def visit_SliceIndexNode(self, node):
+        self.visit(node.base)
+        self.put("[")
+        if node.start:
+            self.visit(node.start)
+        self.put(":")
+        if node.stop:
+            self.visit(node.stop)
+        if node.slice:
+            self.put(":")
+            self.visit(node.slice)
+        self.put("]")
+
+    def visit_SliceNode(self, node):
+        if not node.start.is_none:
+            self.visit(node.start)
+        self.put(":")
+        if not node.stop.is_none:
+            self.visit(node.stop)
+        if not node.step.is_none:
+            self.put(":")
+            self.visit(node.step)
+
+    def visit_CondExprNode(self, node):
+        self.visit(node.true_val)
+        self.put(" if ")
+        self.visit(node.test)
+        self.put(" else ")
+        self.visit(node.false_val)
+
+    def visit_AttributeNode(self, node):
+        self.visit(node.obj)
+        self.put(".%s" % node.attribute)
+
+    def visit_SimpleCallNode(self, node):
+        self.visit(node.function)
+        self.put("(")
+        self.comma_separated_list(node.args)
+        self.put(")")
+
+    def emit_pos_args(self, node):
+        if node is None:
+            return
+        if isinstance(node, AddNode):
+            self.emit_pos_args(node.operand1)
+            self.emit_pos_args(node.operand2)
+        elif isinstance(node, TupleNode):
+            for expr in node.subexpr_nodes():
+                self.visit(expr)
+                self.put(", ")
+        elif isinstance(node, AsTupleNode):
+            self.put("*")
+            self.visit(node.arg)
+            self.put(", ")
+        else:
+            self.visit(node)
+            self.put(", ")
+
+    def emit_kwd_args(self, node):
+        if node is None:
+            return
+        if isinstance(node, MergedDictNode):
+            for expr in node.subexpr_nodes():
+                self.emit_kwd_args(expr)
+        elif isinstance(node, DictNode):
+            for expr in node.subexpr_nodes():
+                self.put("%s=" % expr.key.value)
+                self.visit(expr.value)
+                self.put(", ")
+        else:
+            self.put("**")
+            self.visit(node)
+            self.put(", ")
+
+    def visit_GeneralCallNode(self, node):
+        self.visit(node.function)
+        self.put("(")
+        self.emit_pos_args(node.positional_args)
+        self.emit_kwd_args(node.keyword_args)
+        self.remove(", ")
+        self.put(")")
+
+    def emit_comprehension(self, body, target,
+                           sequence, condition,
+                           parens=("", "")):
+        open_paren, close_paren = parens
+        self.put(open_paren)
+        self.visit(body)
+        self.put(" for ")
+        self.visit(target)
+        self.put(" in ")
+        self.visit(sequence)
+        if condition:
+            self.put(" if ")
+            self.visit(condition)
+        self.put(close_paren)
+
+    def visit_ComprehensionAppendNode(self, node):
+        self.visit(node.expr)
+
+    def visit_DictComprehensionAppendNode(self, node):
+        self.visit(node.key_expr)
+        self.put(": ")
+        self.visit(node.value_expr)
+
+    def visit_ComprehensionNode(self, node):
+        tpmap = {'list': "[]", 'dict': "{}", 'set': "{}"}
+        parens = tpmap[node.type.py_type_name()]
+        body = node.loop.body
+        target = node.loop.target
+        sequence = node.loop.iterator.sequence
+        condition = None
+        if hasattr(body, 'if_clauses'):
+            # type(body) is Nodes.IfStatNode
+            condition = body.if_clauses[0].condition
+            body = body.if_clauses[0].body
+        self.emit_comprehension(body, target, sequence, condition, parens)
+
+    def visit_GeneratorExpressionNode(self, node):
+        body = node.loop.body
+        target = node.loop.target
+        sequence = node.loop.iterator.sequence
+        condition = None
+        if hasattr(body, 'if_clauses'):
+            # type(body) is Nodes.IfStatNode
+            condition = body.if_clauses[0].condition
+            body = body.if_clauses[0].body.expr.arg
+        elif hasattr(body, 'expr'):
+            # type(body) is Nodes.ExprStatNode
+            body = body.expr.arg
+        self.emit_comprehension(body, target, sequence, condition, "()")
+
+
+class PxdWriter(DeclarationWriter, ExpressionWriter):
+    """
+    A Cython code writer for everything supported in pxd files.
+    (currently unused)
+    """
+
+    def __call__(self, node):
+        print('\n'.join(self.write(node).lines))
+        return node
+
+    def visit_CFuncDefNode(self, node):
+        if node.overridable:
+            self.startline('cpdef ')
+        else:
+            self.startline('cdef ')
+        if node.modifiers:
+            self.put(' '.join(node.modifiers))
+            self.put(' ')
+        if node.visibility != 'private':
+            self.put(node.visibility)
+            self.put(' ')
+        if node.api:
+            self.put('api ')
+        self.visit(node.declarator)
+
+    def visit_StatNode(self, node):
+        pass
+
+
+class CodeWriter(StatementWriter, ExpressionWriter):
+    """
+    A complete Cython code writer.
+    """

venv/lib/python3.10/site-packages/Cython/Compiler/AnalysedTreeTransforms.py

@@ -0,0 +1,97 @@
+from .Visitor import ScopeTrackingTransform
+from .Nodes import StatListNode, SingleAssignmentNode, CFuncDefNode, DefNode
+from .ExprNodes import DictNode, DictItemNode, NameNode, UnicodeNode
+from .PyrexTypes import py_object_type
+from .StringEncoding import EncodedString
+from . import Symtab
+
+class AutoTestDictTransform(ScopeTrackingTransform):
+    # Handles autotestdict directive
+
+    excludelist = ['__cinit__', '__dealloc__', '__richcmp__',
+                   '__nonzero__', '__bool__',
+                   '__len__', '__contains__']
+
+    def visit_ModuleNode(self, node):
+        if node.is_pxd:
+            return node
+        self.scope_type = 'module'
+        self.scope_node = node
+
+        if not self.current_directives['autotestdict']:
+            return node
+        self.all_docstrings = self.current_directives['autotestdict.all']
+        self.cdef_docstrings = self.all_docstrings or self.current_directives['autotestdict.cdef']
+
+        assert isinstance(node.body, StatListNode)
+
+        # First see if __test__ is already created
+        if '__test__' in node.scope.entries:
+            # Do nothing
+            return node
+
+        pos = node.pos
+
+        self.tests = []
+        self.testspos = node.pos
+
+        test_dict_entry = node.scope.declare_var(EncodedString('__test__'),
+                                                 py_object_type,
+                                                 pos,
+                                                 visibility='public')
+        create_test_dict_assignment = SingleAssignmentNode(pos,
+            lhs=NameNode(pos, name=EncodedString('__test__'),
+                         entry=test_dict_entry),
+            rhs=DictNode(pos, key_value_pairs=self.tests))
+        self.visitchildren(node)
+        node.body.stats.append(create_test_dict_assignment)
+        return node
+
+    def add_test(self, testpos, path, doctest):
+        pos = self.testspos
+        keystr = EncodedString(f'{path} (line {testpos[1]:d})')
+        key = UnicodeNode(pos, value=keystr)
+        value = UnicodeNode(pos, value=doctest)
+        self.tests.append(DictItemNode(pos, key=key, value=value))
+
+    def visit_ExprNode(self, node):
+        # expressions cannot contain functions and lambda expressions
+        # do not have a docstring
+        return node
+
+    def visit_FuncDefNode(self, node):
+        if not node.doc or (isinstance(node, DefNode) and node.fused_py_func):
+            return node
+        if not self.cdef_docstrings:
+            if isinstance(node, CFuncDefNode) and not node.py_func:
+                return node
+        if not self.all_docstrings and '>>>' not in node.doc:
+            return node
+
+        pos = self.testspos
+        if self.scope_type == 'module':
+            path = node.entry.name
+        elif self.scope_type in ('pyclass', 'cclass'):
+            if isinstance(node, CFuncDefNode):
+                if node.py_func is not None:
+                    name = node.py_func.name
+                else:
+                    name = node.entry.name
+            else:
+                name = node.name
+            if self.scope_type == 'cclass' and name in self.excludelist:
+                return node
+            if self.scope_type == 'pyclass':
+                class_name = self.scope_node.name
+            else:
+                class_name = self.scope_node.class_name
+            if isinstance(node.entry.scope, Symtab.PropertyScope):
+                property_method_name = node.entry.scope.name
+                path = "%s.%s.%s" % (class_name, node.entry.scope.name,
+                                     node.entry.name)
+            else:
+                path = "%s.%s" % (class_name, node.entry.name)
+        else:
+            assert False
+        self.add_test(node.pos, path, node.doc)
+        return node

venv/lib/python3.10/site-packages/Cython/Compiler/Annotate.py

@@ -0,0 +1,325 @@
+# Note: Work in progress
+
+
+import os
+import os.path
+import re
+import textwrap
+from datetime import datetime
+from functools import partial
+from collections import defaultdict
+from xml.sax.saxutils import escape as html_escape
+from io import StringIO
+
+from . import Version
+from .Code import CCodeWriter
+from .. import Utils
+
+
+class AnnotationCCodeWriter(CCodeWriter):
+
+    # also used as marker for detection of complete code emission in tests
+    COMPLETE_CODE_TITLE = "Complete cythonized code"
+
+    def __init__(self, create_from=None, buffer=None, copy_formatting=True, show_entire_c_code=False, source_desc=None):
+        CCodeWriter.__init__(self, create_from, buffer, copy_formatting=copy_formatting)
+        self.show_entire_c_code = show_entire_c_code
+        if create_from is None:
+            self.annotation_buffer = StringIO()
+            self.last_annotated_pos = None
+            # annotations[filename][line] -> [(column, AnnotationItem)*]
+            self.annotations = defaultdict(partial(defaultdict, list))
+            # code[filename][line] -> str
+            self.code = defaultdict(partial(defaultdict, str))
+            # scopes[filename][line] -> set(scopes)
+            self.scopes = defaultdict(partial(defaultdict, set))
+        else:
+            # When creating an insertion point, keep references to the same database
+            self.annotation_buffer = create_from.annotation_buffer
+            self.annotations = create_from.annotations
+            self.code = create_from.code
+            self.scopes = create_from.scopes
+            self.last_annotated_pos = create_from.last_annotated_pos
+
+    def create_new(self, create_from, buffer, copy_formatting):
+        return AnnotationCCodeWriter(create_from, buffer, copy_formatting)
+
+    def _write_to_buffer(self, s):
+        self.buffer.write(s)
+        self.annotation_buffer.write(s)
+
+    def mark_pos(self, pos, trace=True):
+        if pos is not None:
+            CCodeWriter.mark_pos(self, pos, trace)
+            if self.funcstate and self.funcstate.scope:
+                # lambdas and genexprs can result in multiple scopes per line => keep them in a set
+                self.scopes[pos[0].filename][pos[1]].add(self.funcstate.scope)
+        if self.last_annotated_pos:
+            source_desc, line, _ = self.last_annotated_pos
+            pos_code = self.code[source_desc.filename]
+            pos_code[line] += self.annotation_buffer.getvalue()
+        self.annotation_buffer = StringIO()
+        self.last_annotated_pos = pos
+
+    def annotate(self, pos, item):
+        self.annotations[pos[0].filename][pos[1]].append((pos[2], item))
+
+    def _css(self):
+        """css template will later allow to choose a colormap"""
+        css = [self._css_template]
+        for i in range(255):
+            color_shade = int(255.0 // (1.0 + i/10.0))
+            css.append(f'.cython.score-{i:d} {{background-color: #FFFF{color_shade:02x};}}')
+        try:
+            from pygments.formatters import HtmlFormatter
+        except ImportError:
+            pass
+        else:
+            css.append(HtmlFormatter().get_style_defs('.cython'))
+        return '\n'.join(css)
+
+    _css_template = textwrap.dedent("""
+        body.cython { font-family: courier; font-size: 12; }
+
+        .cython.tag  {  }
+        .cython.line { color: #000000; margin: 0em }
+        .cython.code { font-size: 9; color: #444444; display: none; margin: 0px 0px 0px 8px; border-left: 8px none; }
+
+        .cython.line .run { background-color: #B0FFB0; }
+        .cython.line .mis { background-color: #FFB0B0; }
+        .cython.code.run  { border-left: 8px solid #B0FFB0; }
+        .cython.code.mis  { border-left: 8px solid #FFB0B0; }
+
+        .cython.code .py_c_api  { color: red; }
+        .cython.code .py_macro_api  { color: #FF7000; }
+        .cython.code .pyx_c_api  { color: #FF3000; }
+        .cython.code .pyx_macro_api  { color: #FF7000; }
+        .cython.code .refnanny  { color: #FFA000; }
+        .cython.code .trace  { color: #FFA000; }
+        .cython.code .error_goto  { color: #FFA000; }
+
+        .cython.code .coerce  { color: #008000; border: 1px dotted #008000 }
+        .cython.code .py_attr { color: #FF0000; font-weight: bold; }
+        .cython.code .c_attr  { color: #0000FF; }
+        .cython.code .py_call { color: #FF0000; font-weight: bold; }
+        .cython.code .c_call  { color: #0000FF; }
+    """)
+
+    # on-click toggle function to show/hide C source code
+    _onclick_attr = ' onclick="{}"'.format((
+        "(function(s){"
+        "    s.display =  s.display === 'block' ? 'none' : 'block'"
+        "})(this.nextElementSibling.style)"
+        ).replace(' ', '')  # poor dev's JS minification
+    )
+
+    def save_annotation(self, source_filename, target_filename, coverage_xml=None):
+        with Utils.open_source_file(source_filename) as f:
+            code = f.read()
+        generated_code = self.code.get(source_filename, {})
+        c_file = Utils.decode_filename(os.path.basename(target_filename))
+        html_filename = os.path.splitext(target_filename)[0] + ".html"
+
+        with open(html_filename, "w", encoding="UTF-8") as out_buffer:
+            out_buffer.write(self._save_annotation(code, generated_code, c_file, source_filename, coverage_xml))
+
+    def _save_annotation_header(self, c_file, source_filename, coverage_timestamp=None):
+        coverage_info = ''
+        if coverage_timestamp:
+            coverage_info = ' with coverage data from {timestamp}'.format(
+                timestamp=datetime.fromtimestamp(int(coverage_timestamp) // 1000))
+
+        outlist = [
+            textwrap.dedent('''\
+            <!DOCTYPE html>
+            <!-- Generated by Cython {watermark} -->
+            <html>
+            <head>
+                <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+                <title>Cython: {filename}</title>
+                <style type="text/css">
+                {css}
+                </style>
+            </head>
+            <body class="cython">
+            <p><span style="border-bottom: solid 1px grey;">Generated by Cython {watermark}</span>{more_info}</p>
+            <p>
+                <span style="background-color: #FFFF00">Yellow lines</span> hint at Python interaction.<br />
+                Click on a line that starts with a "<code>+</code>" to see the C code that Cython generated for it.
+            </p>
+            ''').format(css=self._css(), watermark=Version.watermark,
+                        filename=os.path.basename(source_filename) if source_filename else '',
+                        more_info=coverage_info)
+        ]
+        if c_file:
+            outlist.append('<p>Raw output: <a href="%s">%s</a></p>\n' % (c_file, c_file))
+        return outlist
+
+    def _save_annotation_footer(self):
+        return ('</body></html>\n',)
+
+    def _save_annotation(self, code, generated_code, c_file=None, source_filename=None, coverage_xml=None):
+        """
+        lines : original cython source code split by lines
+        generated_code : generated c code keyed by line number in original file
+        target filename : name of the file in which to store the generated html
+        c_file : filename in which the c_code has been written
+        """
+        if coverage_xml is not None and source_filename:
+            coverage_timestamp = coverage_xml.get('timestamp', '').strip()
+            covered_lines = self._get_line_coverage(coverage_xml, source_filename)
+        else:
+            coverage_timestamp = covered_lines = None
+        annotation_items = dict(self.annotations[source_filename])
+        scopes = dict(self.scopes[source_filename])
+
+        outlist = []
+        outlist.extend(self._save_annotation_header(c_file, source_filename, coverage_timestamp))
+        outlist.extend(self._save_annotation_body(code, generated_code, annotation_items, scopes, covered_lines))
+        outlist.extend(self._save_annotation_footer())
+        return ''.join(outlist)
+
+    def _get_line_coverage(self, coverage_xml, source_filename):
+        coverage_data = None
+        for entry in coverage_xml.iterfind('.//class'):
+            if not entry.get('filename'):
+                continue
+            if (entry.get('filename') == source_filename or
+                    os.path.abspath(entry.get('filename')) == source_filename):
+                coverage_data = entry
+                break
+            elif source_filename.endswith(entry.get('filename')):
+                coverage_data = entry  # but we might still find a better match...
+        if coverage_data is None:
+            return None
+        return {
+            int(line.get('number')): int(line.get('hits'))
+            for line in coverage_data.iterfind('lines/line')
+        }
+
+    def _htmlify_code(self, code, language):
+        try:
+            from pygments import highlight
+            from pygments.lexers import CythonLexer, CppLexer
+            from pygments.formatters import HtmlFormatter
+        except ImportError:
+            # no Pygments, just escape the code
+            return html_escape(code)
+
+        if language == "cython":
+            lexer = CythonLexer(stripnl=False, stripall=False)
+        elif language == "c/cpp":
+            lexer = CppLexer(stripnl=False, stripall=False)
+        else:
+            # unknown language, use fallback
+            return html_escape(code)
+        html_code = highlight(
+            code, lexer,
+            HtmlFormatter(nowrap=True))
+        return html_code
+
+    def _save_annotation_body(self, cython_code, generated_code, annotation_items, scopes, covered_lines=None):
+        outlist = ['<div class="cython">']
+        pos_comment_marker = '/* \N{HORIZONTAL ELLIPSIS} */\n'
+        new_calls_map = {
+            name: 0 for name in
+            'refnanny trace py_macro_api py_c_api pyx_macro_api pyx_c_api error_goto'.split()
+        }.copy
+
+        self.mark_pos(None)
+
+        def annotate(match):
+            group_name = match.lastgroup
+            calls[group_name] += 1
+            return f"<span class='{group_name}'>{match.group(group_name)}</span>"
+
+        lines = self._htmlify_code(cython_code, "cython").splitlines()
+        lineno_width = len(str(len(lines)))
+        if not covered_lines:
+            covered_lines = None
+
+        for k, line in enumerate(lines, 1):
+            try:
+                c_code = generated_code[k]
+            except KeyError:
+                c_code = ''
+            else:
+                c_code = _replace_pos_comment(pos_comment_marker, c_code)
+                if c_code.startswith(pos_comment_marker):
+                    c_code = c_code[len(pos_comment_marker):]
+                c_code = html_escape(c_code)
+
+            calls = new_calls_map()
+            c_code = _parse_code(annotate, c_code)
+            score = (5 * calls['py_c_api'] + 2 * calls['pyx_c_api'] +
+                     calls['py_macro_api'] + calls['pyx_macro_api'])
+
+            if c_code:
+                onclick = self._onclick_attr
+                expandsymbol = '+'
+            else:
+                onclick = ''
+                expandsymbol = '&#xA0;'
+
+            covered = ''
+            if covered_lines is not None and k in covered_lines:
+                hits = covered_lines[k]
+                if hits is not None:
+                    covered = 'run' if hits else 'mis'
+
+            outlist.append(
+                f'<pre class="cython line score-{score}"{onclick}>'
+                # generate line number with expand symbol in front,
+                # and the right  number of digit
+                f'{expandsymbol}<span class="{covered}">{k:0{lineno_width}d}</span>: {line.rstrip()}</pre>\n'
+            )
+            if c_code:
+                outlist.append(f"<pre class='cython code score-{score} {covered}'>{c_code}</pre>")
+        outlist.append("</div>")
+
+        # now the whole c-code if needed:
+        if self.show_entire_c_code:
+            complete_code_as_html = self._htmlify_code(self.buffer.getvalue(), "c/cpp")
+            outlist.append(
+                '<p><div class="cython">'
+                f"<pre class='cython line'{self._onclick_attr}>+ {AnnotationCCodeWriter.COMPLETE_CODE_TITLE}</pre>\n"
+                f"<pre class='cython code'>{complete_code_as_html}</pre>"
+                "</div></p>"
+            )
+
+        return outlist
+
+
+_parse_code = re.compile((
+    br'(?P<refnanny>__Pyx_X?(?:GOT|GIVE)REF|__Pyx_RefNanny[A-Za-z]+)|'
+    br'(?P<trace>__Pyx_Trace[A-Za-z]+)|'
+    br'(?:'
+    br'(?P<pyx_macro_api>__Pyx_[A-Z][A-Z_]+)|'
+    br'(?P<pyx_c_api>(?:__Pyx_[A-Z][a-z_][A-Za-z_]*)|__pyx_convert_[A-Za-z_]*)|'
+    br'(?P<py_macro_api>Py[A-Z][a-z]+_[A-Z][A-Z_]+)|'
+    br'(?P<py_c_api>Py[A-Z][a-z]+_[A-Z][a-z][A-Za-z_]*)'
+    br')(?=\()|'       # look-ahead to exclude subsequent '(' from replacement
+    br'(?P<error_goto>(?:(?<=;) *if [^;]* +)?__PYX_ERR\([^)]+\))'
+).decode('ascii')).sub
+
+
+_replace_pos_comment = re.compile(
+    # this matches what Cython generates as code line marker comment
+    br'^\s*/\*(?:(?:[^*]|\*[^/])*\n)+\s*\*/\s*\n'.decode('ascii'),
+    re.M
+).sub
+
+
+class AnnotationItem:
+
+    def __init__(self, style, text, tag="", size=0):
+        self.style = style
+        self.text = text
+        self.tag = tag
+        self.size = size
+
+    def start(self):
+        return "<span class='cython tag %s' title='%s'>%s" % (self.style, self.text, self.tag)
+
+    def end(self):
+        return self.size, "</span>"

venv/lib/python3.10/site-packages/Cython/Compiler/AutoDocTransforms.py

@@ -0,0 +1,320 @@
+import inspect
+
+from .Visitor import CythonTransform
+from .StringEncoding import EncodedString
+from . import Options
+from . import PyrexTypes
+from ..CodeWriter import ExpressionWriter
+from .Errors import warning
+
+
+class AnnotationWriter(ExpressionWriter):
+    """
+    A Cython code writer for Python expressions in argument/variable annotations.
+    """
+    def __init__(self, description=None):
+        """description is optional. If specified it is used in
+        warning messages for the nodes that don't convert to string properly.
+        If not specified then no messages are generated.
+        """
+        ExpressionWriter.__init__(self)
+        self.description = description
+        self.incomplete = False
+
+    def visit_Node(self, node):
+        self.put("<???>")
+        self.incomplete = True
+        if self.description:
+            warning(node.pos,
+                    "Failed to convert code to string representation in {}".format(
+                        self.description), level=1)
+
+    def visit_LambdaNode(self, node):
+        # XXX Should we do better?
+        self.put("<lambda>")
+        self.incomplete = True
+        if self.description:
+            warning(node.pos,
+                    "Failed to convert lambda to string representation in {}".format(
+                        self.description), level=1)
+
+    def visit_AnnotationNode(self, node):
+        self.put(node.string.value)
+
+
+class EmbedSignature(CythonTransform):
+
+    def __init__(self, context):
+        super().__init__(context)
+        self.class_name = None
+        self.class_node = None
+
+    def _fmt_expr(self, node):
+        writer = ExpressionWriter()
+        result = writer.write(node)
+        # print(type(node).__name__, '-->', result)
+        return result
+
+    def _fmt_annotation(self, node):
+        writer = AnnotationWriter()
+        result = writer.write(node)
+        # print(type(node).__name__, '-->', result)
+        return result
+
+    def _setup_format(self):
+        signature_format = self.current_directives['embedsignature.format']
+        self.is_format_c = signature_format == 'c'
+        self.is_format_python = signature_format == 'python'
+        self.is_format_clinic = signature_format == 'clinic'
+
+    def _fmt_arg(self, arg):
+        arg_doc = arg.name
+        annotation = None
+        defaultval = None
+        if arg.is_self_arg:
+            if self.is_format_clinic:
+                arg_doc = '$self'
+        elif arg.is_type_arg:
+            if self.is_format_clinic:
+                arg_doc = '$type'
+        elif self.is_format_c:
+            if arg.type is not PyrexTypes.py_object_type:
+                arg_doc = arg.type.declaration_code(arg.name, for_display=1)
+        elif self.is_format_python:
+            if not arg.annotation:
+                annotation = self._fmt_type(arg.type)
+        if arg.annotation:
+            if not self.is_format_clinic:
+                annotation = self._fmt_annotation(arg.annotation)
+        if arg.default:
+            defaultval = self._fmt_expr(arg.default)
+        if annotation:
+            arg_doc = arg_doc + (': %s' % annotation)
+            if defaultval:
+                arg_doc = arg_doc + (' = %s' % defaultval)
+        elif defaultval:
+            arg_doc = arg_doc + ('=%s' % defaultval)
+        return arg_doc
+
+    def _fmt_star_arg(self, arg):
+        arg_doc = arg.name
+        if arg.annotation:
+            if not self.is_format_clinic:
+                annotation = self._fmt_annotation(arg.annotation)
+                arg_doc = arg_doc + (': %s' % annotation)
+        return arg_doc
+
+    def _fmt_arglist(self, args,
+                     npoargs=0, npargs=0, pargs=None,
+                     nkargs=0, kargs=None,
+                     hide_self=False):
+        arglist = []
+        for arg in args:
+            if not hide_self or not arg.entry.is_self_arg:
+                arg_doc = self._fmt_arg(arg)
+                arglist.append(arg_doc)
+        if pargs:
+            arg_doc = self._fmt_star_arg(pargs)
+            arglist.insert(npargs + npoargs, '*%s' % arg_doc)
+        elif nkargs:
+            arglist.insert(npargs + npoargs, '*')
+        if npoargs:
+            arglist.insert(npoargs, '/')
+        if kargs:
+            arg_doc = self._fmt_star_arg(kargs)
+            arglist.append('**%s' % arg_doc)
+        return arglist
+
+    def _fmt_type(self, type):
+        if type is PyrexTypes.py_object_type:
+            return None
+        elif self.is_format_c:
+            code = type.declaration_code("", for_display=1)
+            return code
+        elif self.is_format_python:
+            annotation = None
+            if type.is_string:
+                annotation = self.current_directives['c_string_type']
+            elif type.is_numeric:
+                annotation = type.py_type_name()
+            if annotation is None:
+                code = type.declaration_code('', for_display=1)
+                annotation = code.replace(' ', '_').replace('*', 'p')
+            return annotation
+        return None
+
+    def _fmt_signature(self, cls_name, func_name, args,
+                       npoargs=0, npargs=0, pargs=None,
+                       nkargs=0, kargs=None,
+                       return_expr=None, return_type=None,
+                       hide_self=False):
+        arglist = self._fmt_arglist(
+            args, npoargs, npargs, pargs, nkargs, kargs,
+            hide_self=hide_self,
+        )
+        arglist_doc = ', '.join(arglist)
+        func_doc = '%s(%s)' % (func_name, arglist_doc)
+        if self.is_format_c and cls_name:
+            func_doc = '%s.%s' % (cls_name, func_doc)
+        if not self.is_format_clinic:
+            ret_doc = None
+            if return_expr:
+                ret_doc = self._fmt_annotation(return_expr)
+            elif return_type:
+                ret_doc = self._fmt_type(return_type)
+            if ret_doc:
+                func_doc = '%s -> %s' % (func_doc, ret_doc)
+        return func_doc
+
+    def _embed_signature(self, signature, node_doc):
+        if self.is_format_clinic and self.current_directives['binding']:
+            return node_doc
+        if node_doc:
+            if self.is_format_clinic:
+                docfmt = "%s\n--\n\n%s"
+            else:
+                docfmt = "%s\n\n%s"
+            node_doc = inspect.cleandoc(node_doc)
+            return docfmt % (signature, node_doc)
+        else:
+            if self.is_format_clinic:
+                docfmt = "%s\n--\n\n"
+            else:
+                docfmt = "%s"
+            return docfmt % signature
+
+    def __call__(self, node):
+        if not Options.docstrings:
+            return node
+        else:
+            return super().__call__(node)
+
+    def visit_ClassDefNode(self, node):
+        oldname = self.class_name
+        oldclass = self.class_node
+        self.class_node = node
+        try:
+            # PyClassDefNode
+            self.class_name = node.name
+        except AttributeError:
+            # CClassDefNode
+            self.class_name = node.class_name
+        self.visitchildren(node)
+        self.class_name = oldname
+        self.class_node = oldclass
+        return node
+
+    def visit_LambdaNode(self, node):
+        # lambda expressions so not have signature or inner functions
+        return node
+
+    def visit_DefNode(self, node):
+        if not self.current_directives['embedsignature']:
+            return node
+        self._setup_format()
+
+        is_constructor = False
+        hide_self = False
+        if node.entry.is_special:
+            is_constructor = self.class_node and node.name == '__init__'
+            if is_constructor:
+                class_name = None
+                func_name = node.name
+                if self.is_format_c:
+                    func_name = self.class_name
+                    hide_self = True
+            else:
+                class_name, func_name = self.class_name, node.name
+        else:
+            class_name, func_name = self.class_name, node.name
+
+        npoargs = getattr(node, 'num_posonly_args', 0)
+        nkargs = getattr(node, 'num_kwonly_args', 0)
+        npargs = len(node.args) - nkargs - npoargs
+        signature = self._fmt_signature(
+            class_name, func_name, node.args,
+            npoargs, npargs, node.star_arg,
+            nkargs, node.starstar_arg,
+            return_expr=node.return_type_annotation,
+            return_type=None, hide_self=hide_self)
+        if signature:
+            if is_constructor and self.is_format_c:
+                doc_holder = self.class_node.entry.type.scope
+            else:
+                doc_holder = node.entry
+            if doc_holder.doc is not None:
+                old_doc = doc_holder.doc
+            elif not is_constructor and getattr(node, 'py_func', None) is not None:
+                old_doc = node.py_func.entry.doc
+            else:
+                old_doc = None
+            new_doc = self._embed_signature(signature, old_doc)
+            if not node.entry.is_special or is_constructor or node.entry.wrapperbase_cname is not None:
+                # TODO: the wrapperbase must be generated for __doc__ to exist;
+                # however this phase is run later in the pipeline than
+                # Compiler/Nodes.py:declare_pyfunction, so wrapperbase_cname
+                # may already be set to None
+                doc_holder.doc = EncodedString(new_doc)
+            if not is_constructor and getattr(node, 'py_func', None) is not None:
+                node.py_func.entry.doc = EncodedString(new_doc)
+        return node
+
+    def visit_CFuncDefNode(self, node):
+        if not node.overridable:  # not cpdef FOO(...):
+            return node
+        if not self.current_directives['embedsignature']:
+            return node
+        self._setup_format()
+
+        signature = self._fmt_signature(
+            self.class_name, node.declarator.base.name,
+            node.declarator.args,
+            return_type=node.return_type)
+        if signature:
+            if node.entry.doc is not None:
+                old_doc = node.entry.doc
+            elif getattr(node, 'py_func', None) is not None:
+                old_doc = node.py_func.entry.doc
+            else:
+                old_doc = None
+            new_doc = self._embed_signature(signature, old_doc)
+            node.entry.doc = EncodedString(new_doc)
+            py_func = getattr(node, 'py_func', None)
+            if py_func is not None:
+                py_func.entry.doc = EncodedString(new_doc)
+        return node
+
+    def visit_PropertyNode(self, node):
+        if not self.current_directives['embedsignature']:
+            return node
+        self._setup_format()
+
+        entry = node.entry
+        body = node.body
+        prop_name = entry.name
+        type_name = None
+        if entry.visibility == 'public':
+            if self.is_format_c:
+                # property synthesised from a cdef public attribute
+                type_name = entry.type.declaration_code("", for_display=1)
+                if not entry.type.is_pyobject:
+                    type_name = "'%s'" % type_name
+                elif entry.type.is_extension_type:
+                    type_name = entry.type.module_name + '.' + type_name
+            elif self.is_format_python:
+                type_name = self._fmt_type(entry.type)
+        if type_name is None:
+            for stat in body.stats:
+                if stat.name != '__get__':
+                    continue
+                if self.is_format_c:
+                    prop_name = '%s.%s' % (self.class_name, prop_name)
+                ret_annotation = stat.return_type_annotation
+                if ret_annotation:
+                    type_name = self._fmt_annotation(ret_annotation)
+        if type_name is not None :
+            signature = '%s: %s' % (prop_name, type_name)
+            new_doc = self._embed_signature(signature, entry.doc)
+            if not self.is_format_clinic:
+                entry.doc = EncodedString(new_doc)
+        return node

venv/lib/python3.10/site-packages/Cython/Compiler/Buffer.py

@@ -0,0 +1,680 @@
+from .Visitor import CythonTransform
+from .ModuleNode import ModuleNode
+from .Errors import CompileError
+from .UtilityCode import CythonUtilityCode
+from .Code import UtilityCode, TempitaUtilityCode
+
+from . import Options
+from . import Interpreter
+from . import PyrexTypes
+from . import Naming
+from . import Symtab
+
+def dedent(text, reindent=0):
+    from textwrap import dedent
+    text = dedent(text)
+    if reindent > 0:
+        indent = " " * reindent
+        text = '\n'.join([indent + x for x in text.split('\n')])
+    return text
+
+class IntroduceBufferAuxiliaryVars(CythonTransform):
+
+    #
+    # Entry point
+    #
+
+    buffers_exists = False
+    using_memoryview = False
+
+    def __call__(self, node):
+        assert isinstance(node, ModuleNode)
+        self.max_ndim = 0
+        result = super().__call__(node)
+        if self.buffers_exists:
+            use_bufstruct_declare_code(node.scope)
+
+        return result
+
+
+    #
+    # Basic operations for transforms
+    #
+    def handle_scope(self, node, scope):
+        # For all buffers, insert extra variables in the scope.
+        # The variables are also accessible from the buffer_info
+        # on the buffer entry
+        scope_items = scope.entries.items()
+        bufvars = [entry for name, entry in scope_items if entry.type.is_buffer]
+        if len(bufvars) > 0:
+            bufvars.sort(key=lambda entry: entry.name)
+            self.buffers_exists = True
+
+        memviewslicevars = [entry for name, entry in scope_items if entry.type.is_memoryviewslice]
+        if len(memviewslicevars) > 0:
+            self.buffers_exists = True
+
+
+        for (name, entry) in scope_items:
+            if name == 'memoryview' and isinstance(entry.utility_code_definition, CythonUtilityCode):
+                self.using_memoryview = True
+                break
+        del scope_items
+
+        if isinstance(node, ModuleNode) and len(bufvars) > 0:
+            # for now...note that pos is wrong
+            raise CompileError(node.pos, "Buffer vars not allowed in module scope")
+        for entry in bufvars:
+            if entry.type.dtype.is_ptr:
+                raise CompileError(node.pos, "Buffers with pointer types not yet supported.")
+
+            name = entry.name
+            buftype = entry.type
+            if buftype.ndim > Options.buffer_max_dims:
+                raise CompileError(node.pos,
+                        "Buffer ndims exceeds Options.buffer_max_dims = %d" % Options.buffer_max_dims)
+            if buftype.ndim > self.max_ndim:
+                self.max_ndim = buftype.ndim
+
+            # Declare auxiliary vars
+            def decvar(type, prefix):
+                cname = scope.mangle(prefix, name)
+                aux_var = scope.declare_var(name=None, cname=cname,
+                                            type=type, pos=node.pos)
+                if entry.is_arg:
+                    aux_var.used = True  # otherwise, NameNode will mark whether it is used
+
+                return aux_var
+
+            auxvars = ((PyrexTypes.c_pyx_buffer_nd_type, Naming.pybuffernd_prefix),
+                       (PyrexTypes.c_pyx_buffer_type, Naming.pybufferstruct_prefix))
+            pybuffernd, rcbuffer = [decvar(type, prefix) for (type, prefix) in auxvars]
+
+            entry.buffer_aux = Symtab.BufferAux(pybuffernd, rcbuffer)
+
+        scope.buffer_entries = bufvars
+        self.scope = scope
+
+    def visit_ModuleNode(self, node):
+        self.handle_scope(node, node.scope)
+        self.visitchildren(node)
+        return node
+
+    def visit_FuncDefNode(self, node):
+        self.handle_scope(node, node.local_scope)
+        self.visitchildren(node)
+        return node
+
+#
+# Analysis
+#
+buffer_options = ("dtype", "ndim", "mode", "negative_indices", "cast")  # ordered!
+buffer_defaults = {"ndim": 1, "mode": "full", "negative_indices": True, "cast": False}
+buffer_positional_options_count = 1  # anything beyond this needs keyword argument
+
+ERR_BUF_OPTION_UNKNOWN = '"%s" is not a buffer option'
+ERR_BUF_TOO_MANY = 'Too many buffer options'
+ERR_BUF_DUP = '"%s" buffer option already supplied'
+ERR_BUF_MISSING = '"%s" missing'
+ERR_BUF_MODE = 'Only allowed buffer modes are: "c", "fortran", "full", "strided" (as a compile-time string)'
+ERR_BUF_NDIM = 'ndim must be a non-negative integer'
+ERR_BUF_DTYPE = 'dtype must be "object", numeric type or a struct'
+ERR_BUF_BOOL = '"%s" must be a boolean'
+
+def analyse_buffer_options(globalpos, env, posargs, dictargs, defaults=None, need_complete=True):
+    """
+    Must be called during type analysis, as analyse is called
+    on the dtype argument.
+
+    posargs and dictargs should consist of a list and a dict
+    of tuples (value, pos). Defaults should be a dict of values.
+
+    Returns a dict containing all the options a buffer can have and
+    its value (with the positions stripped).
+    """
+    if defaults is None:
+        defaults = buffer_defaults
+
+    posargs, dictargs = Interpreter.interpret_compiletime_options(
+        posargs, dictargs, type_env=env, type_args=(0, 'dtype'))
+
+    if len(posargs) > buffer_positional_options_count:
+        raise CompileError(posargs[-1][1], ERR_BUF_TOO_MANY)
+
+    options = {}
+    for name, (value, pos) in dictargs.items():
+        if name not in buffer_options:
+            raise CompileError(pos, ERR_BUF_OPTION_UNKNOWN % name)
+        options[name] = value
+
+    for name, (value, pos) in zip(buffer_options, posargs):
+        if name not in buffer_options:
+            raise CompileError(pos, ERR_BUF_OPTION_UNKNOWN % name)
+        if name in options:
+            raise CompileError(pos, ERR_BUF_DUP % name)
+        options[name] = value
+
+    # Check that they are all there and copy defaults
+    for name in buffer_options:
+        if name not in options:
+            try:
+                options[name] = defaults[name]
+            except KeyError:
+                if need_complete:
+                    raise CompileError(globalpos, ERR_BUF_MISSING % name)
+
+    dtype = options.get("dtype")
+    if dtype and dtype.is_extension_type:
+        raise CompileError(globalpos, ERR_BUF_DTYPE)
+
+    ndim = options.get("ndim")
+    if ndim and (not isinstance(ndim, int) or ndim < 0):
+        raise CompileError(globalpos, ERR_BUF_NDIM)
+
+    mode = options.get("mode")
+    if mode and not (mode in ('full', 'strided', 'c', 'fortran')):
+        raise CompileError(globalpos, ERR_BUF_MODE)
+
+    def assert_bool(name):
+        x = options.get(name)
+        if not isinstance(x, bool):
+            raise CompileError(globalpos, ERR_BUF_BOOL % name)
+
+    assert_bool('negative_indices')
+    assert_bool('cast')
+
+    return options
+
+
+#
+# Code generation
+#
+
+class BufferEntry:
+    def __init__(self, entry):
+        self.entry = entry
+        self.type = entry.type
+        self.cname = entry.buffer_aux.buflocal_nd_var.cname
+        self.buf_ptr = "%s.rcbuffer->pybuffer.buf" % self.cname
+        self.buf_ptr_type = entry.type.buffer_ptr_type
+        self.init_attributes()
+
+    def init_attributes(self):
+        self.shape = self.get_buf_shapevars()
+        self.strides = self.get_buf_stridevars()
+        self.suboffsets = self.get_buf_suboffsetvars()
+
+    def get_buf_suboffsetvars(self):
+        return self._for_all_ndim("%s.diminfo[%d].suboffsets")
+
+    def get_buf_stridevars(self):
+        return self._for_all_ndim("%s.diminfo[%d].strides")
+
+    def get_buf_shapevars(self):
+        return self._for_all_ndim("%s.diminfo[%d].shape")
+
+    def _for_all_ndim(self, s):
+        return [s % (self.cname, i) for i in range(self.type.ndim)]
+
+    def generate_buffer_lookup_code(self, code, index_cnames):
+        # Create buffer lookup and return it
+        # This is done via utility macros/inline functions, which vary
+        # according to the access mode used.
+        params = []
+        nd = self.type.ndim
+        mode = self.type.mode
+        if mode == 'full':
+            for i, s, o in zip(index_cnames,
+                               self.get_buf_stridevars(),
+                               self.get_buf_suboffsetvars()):
+                params.append(i)
+                params.append(s)
+                params.append(o)
+            funcname = "__Pyx_BufPtrFull%dd" % nd
+            funcgen = buf_lookup_full_code
+        else:
+            if mode == 'strided':
+                funcname = "__Pyx_BufPtrStrided%dd" % nd
+                funcgen = buf_lookup_strided_code
+            elif mode == 'c':
+                funcname = "__Pyx_BufPtrCContig%dd" % nd
+                funcgen = buf_lookup_c_code
+            elif mode == 'fortran':
+                funcname = "__Pyx_BufPtrFortranContig%dd" % nd
+                funcgen = buf_lookup_fortran_code
+            else:
+                assert False
+            for i, s in zip(index_cnames, self.get_buf_stridevars()):
+                params.append(i)
+                params.append(s)
+
+        # Make sure the utility code is available
+        if funcname not in code.globalstate.utility_codes:
+            code.globalstate.utility_codes.add(funcname)
+            protocode = code.globalstate['utility_code_proto']
+            defcode = code.globalstate['utility_code_def']
+            funcgen(protocode, defcode, name=funcname, nd=nd)
+
+        buf_ptr_type_code = self.buf_ptr_type.empty_declaration_code()
+        ptrcode = "%s(%s, %s, %s)" % (funcname, buf_ptr_type_code, self.buf_ptr,
+                                      ", ".join(params))
+        return ptrcode
+
+
+def get_flags(buffer_aux, buffer_type):
+    flags = 'PyBUF_FORMAT'
+    mode = buffer_type.mode
+    if mode == 'full':
+        flags += '| PyBUF_INDIRECT'
+    elif mode == 'strided':
+        flags += '| PyBUF_STRIDES'
+    elif mode == 'c':
+        flags += '| PyBUF_C_CONTIGUOUS'
+    elif mode == 'fortran':
+        flags += '| PyBUF_F_CONTIGUOUS'
+    else:
+        assert False
+    if buffer_aux.writable_needed: flags += "| PyBUF_WRITABLE"
+    return flags
+
+def used_buffer_aux_vars(entry):
+    buffer_aux = entry.buffer_aux
+    buffer_aux.buflocal_nd_var.used = True
+    buffer_aux.rcbuf_var.used = True
+
+def put_unpack_buffer_aux_into_scope(buf_entry, code):
+    # Generate code to copy the needed struct info into local
+    # variables.
+    buffer_aux, mode = buf_entry.buffer_aux, buf_entry.type.mode
+    pybuffernd_struct = buffer_aux.buflocal_nd_var.cname
+
+    fldnames = ['strides', 'shape']
+    if mode == 'full':
+        fldnames.append('suboffsets')
+
+    ln = []
+    for i in range(buf_entry.type.ndim):
+        for fldname in fldnames:
+            ln.append("%s.diminfo[%d].%s = %s.rcbuffer->pybuffer.%s[%d];" % (
+                pybuffernd_struct, i, fldname,
+                pybuffernd_struct, fldname, i,
+            ))
+    code.putln(' '.join(ln))
+
+def put_init_vars(entry, code):
+    bufaux = entry.buffer_aux
+    pybuffernd_struct = bufaux.buflocal_nd_var.cname
+    pybuffer_struct = bufaux.rcbuf_var.cname
+    # init pybuffer_struct
+    code.putln("%s.pybuffer.buf = NULL;" % pybuffer_struct)
+    code.putln("%s.refcount = 0;" % pybuffer_struct)
+    # init the buffer object
+    # code.put_init_var_to_py_none(entry)
+    # init the pybuffernd_struct
+    code.putln("%s.data = NULL;" % pybuffernd_struct)
+    code.putln("%s.rcbuffer = &%s;" % (pybuffernd_struct, pybuffer_struct))
+
+
+def put_acquire_arg_buffer(entry, code, pos):
+    buffer_aux = entry.buffer_aux
+    getbuffer = get_getbuffer_call(code, entry.cname, buffer_aux, entry.type)
+
+    # Acquire any new buffer
+    code.putln("{")
+    code.putln("__Pyx_BufFmt_StackElem __pyx_stack[%d];" % entry.type.dtype.struct_nesting_depth())
+    code.putln(code.error_goto_if("%s == -1" % getbuffer, pos))
+    code.putln("}")
+    # An exception raised in arg parsing cannot be caught, so no
+    # need to care about the buffer then.
+    put_unpack_buffer_aux_into_scope(entry, code)
+
+
+def put_release_buffer_code(code, entry):
+    code.globalstate.use_utility_code(acquire_utility_code)
+    code.putln("__Pyx_SafeReleaseBuffer(&%s.rcbuffer->pybuffer);" % entry.buffer_aux.buflocal_nd_var.cname)
+
+
+def get_getbuffer_call(code, obj_cname, buffer_aux, buffer_type):
+    ndim = buffer_type.ndim
+    cast = int(buffer_type.cast)
+    flags = get_flags(buffer_aux, buffer_type)
+    pybuffernd_struct = buffer_aux.buflocal_nd_var.cname
+
+    dtype_typeinfo = get_type_information_cname(code, buffer_type.dtype)
+
+    code.globalstate.use_utility_code(acquire_utility_code)
+    return ("__Pyx_GetBufferAndValidate(&%(pybuffernd_struct)s.rcbuffer->pybuffer, "
+            "(PyObject*)%(obj_cname)s, &%(dtype_typeinfo)s, %(flags)s, %(ndim)d, "
+            "%(cast)d, __pyx_stack)" % locals())
+
+
+def put_assign_to_buffer(lhs_cname, rhs_cname, buf_entry,
+                         is_initialized, pos, code):
+    """
+    Generate code for reassigning a buffer variables. This only deals with getting
+    the buffer auxiliary structure and variables set up correctly, the assignment
+    itself and refcounting is the responsibility of the caller.
+
+    However, the assignment operation may throw an exception so that the reassignment
+    never happens.
+
+    Depending on the circumstances there are two possible outcomes:
+    - Old buffer released, new acquired, rhs assigned to lhs
+    - Old buffer released, new acquired which fails, reaqcuire old lhs buffer
+      (which may or may not succeed).
+    """
+
+    buffer_aux, buffer_type = buf_entry.buffer_aux, buf_entry.type
+    pybuffernd_struct = buffer_aux.buflocal_nd_var.cname
+    flags = get_flags(buffer_aux, buffer_type)
+
+    code.putln("{")  # Set up necessary stack for getbuffer
+    code.putln("__Pyx_BufFmt_StackElem __pyx_stack[%d];" % buffer_type.dtype.struct_nesting_depth())
+
+    getbuffer = get_getbuffer_call(code, "%s", buffer_aux, buffer_type)  # fill in object below
+
+    if is_initialized:
+        # Release any existing buffer
+        code.putln('__Pyx_SafeReleaseBuffer(&%s.rcbuffer->pybuffer);' % pybuffernd_struct)
+        # Acquire
+        retcode_cname = code.funcstate.allocate_temp(PyrexTypes.c_int_type, manage_ref=False)
+        code.putln("%s = %s;" % (retcode_cname, getbuffer % rhs_cname))
+        code.putln('if (%s) {' % (code.unlikely("%s < 0" % retcode_cname)))
+        # If acquisition failed, attempt to reacquire the old buffer
+        # before raising the exception. A failure of reacquisition
+        # will cause the reacquisition exception to be reported, one
+        # can consider working around this later.
+        exc_temps = tuple(code.funcstate.allocate_temp(PyrexTypes.py_object_type, manage_ref=False)
+                          for _ in range(3))
+        code.putln('PyErr_Fetch(&%s, &%s, &%s);' % exc_temps)
+        code.putln('if (%s) {' % code.unlikely("%s == -1" % (getbuffer % lhs_cname)))
+        code.putln('Py_XDECREF(%s); Py_XDECREF(%s); Py_XDECREF(%s);' % exc_temps)  # Do not refnanny these!
+        code.globalstate.use_utility_code(raise_buffer_fallback_code)
+        code.putln('__Pyx_RaiseBufferFallbackError();')
+        code.putln('} else {')
+        code.putln('PyErr_Restore(%s, %s, %s);' % exc_temps)
+        code.putln('}')
+        code.putln('%s = %s = %s = 0;' % exc_temps)
+        for t in exc_temps:
+            code.funcstate.release_temp(t)
+        code.putln('}')
+        # Unpack indices
+        put_unpack_buffer_aux_into_scope(buf_entry, code)
+        code.putln(code.error_goto_if_neg(retcode_cname, pos))
+        code.funcstate.release_temp(retcode_cname)
+    else:
+        # Our entry had no previous value, so set to None when acquisition fails.
+        # In this case, auxiliary vars should be set up right in initialization to a zero-buffer,
+        # so it suffices to set the buf field to NULL.
+        code.putln('if (%s) {' % code.unlikely("%s == -1" % (getbuffer % rhs_cname)))
+        code.putln('%s = %s; __Pyx_INCREF(Py_None); %s.rcbuffer->pybuffer.buf = NULL;' %
+                   (lhs_cname,
+                    PyrexTypes.typecast(buffer_type, PyrexTypes.py_object_type, "Py_None"),
+                    pybuffernd_struct))
+        code.putln(code.error_goto(pos))
+        code.put('} else {')
+        # Unpack indices
+        put_unpack_buffer_aux_into_scope(buf_entry, code)
+        code.putln('}')
+
+    code.putln("}")  # Release stack
+
+
+def put_buffer_lookup_code(entry, index_signeds, index_cnames, directives,
+                           pos, code, negative_indices, in_nogil_context):
+    """
+    Generates code to process indices and calculate an offset into
+    a buffer. Returns a C string which gives a pointer which can be
+    read from or written to at will (it is an expression so caller should
+    store it in a temporary if it is used more than once).
+
+    As the bounds checking can have any number of combinations of unsigned
+    arguments, smart optimizations etc. we insert it directly in the function
+    body. The lookup however is delegated to a inline function that is instantiated
+    once per ndim (lookup with suboffsets tend to get quite complicated).
+
+    entry is a BufferEntry
+    """
+    negative_indices = directives['wraparound'] and negative_indices
+
+    if directives['boundscheck']:
+        # Check bounds and fix negative indices.
+        # We allocate a temporary which is initialized to -1, meaning OK (!).
+        # If an error occurs, the temp is set to the index dimension the
+        # error is occurring at.
+        failed_dim_temp = code.funcstate.allocate_temp(PyrexTypes.c_int_type, manage_ref=False)
+        code.putln("%s = -1;" % failed_dim_temp)
+        for dim, (signed, cname, shape) in enumerate(zip(index_signeds, index_cnames, entry.get_buf_shapevars())):
+            if signed != 0:
+                # not unsigned, deal with negative index
+                code.putln("if (%s < 0) {" % cname)
+                if negative_indices:
+                    code.putln("%s += %s;" % (cname, shape))
+                    code.putln("if (%s) %s = %d;" % (
+                        code.unlikely("%s < 0" % cname),
+                        failed_dim_temp, dim))
+                else:
+                    code.putln("%s = %d;" % (failed_dim_temp, dim))
+                code.put("} else ")
+            # check bounds in positive direction
+            if signed != 0:
+                cast = ""
+            else:
+                cast = "(size_t)"
+            code.putln("if (%s) %s = %d;" % (
+                code.unlikely("%s >= %s%s" % (cname, cast, shape)),
+                failed_dim_temp, dim))
+
+        if in_nogil_context:
+            code.globalstate.use_utility_code(raise_indexerror_nogil)
+            func = '__Pyx_RaiseBufferIndexErrorNogil'
+        else:
+            code.globalstate.use_utility_code(raise_indexerror_code)
+            func = '__Pyx_RaiseBufferIndexError'
+
+        code.putln("if (%s) {" % code.unlikely("%s != -1" % failed_dim_temp))
+        code.putln('%s(%s);' % (func, failed_dim_temp))
+        code.putln(code.error_goto(pos))
+        code.putln('}')
+        code.funcstate.release_temp(failed_dim_temp)
+    elif negative_indices:
+        # Only fix negative indices.
+        for signed, cname, shape in zip(index_signeds, index_cnames, entry.get_buf_shapevars()):
+            if signed != 0:
+                code.putln("if (%s < 0) %s += %s;" % (cname, cname, shape))
+
+    return entry.generate_buffer_lookup_code(code, index_cnames)
+
+
+def use_bufstruct_declare_code(env):
+    env.use_utility_code(buffer_struct_declare_code)
+
+
+def buf_lookup_full_code(proto, defin, name, nd):
+    """
+    Generates a buffer lookup function for the right number
+    of dimensions. The function gives back a void* at the right location.
+    """
+    # _i_ndex, _s_tride, sub_o_ffset
+    macroargs = ", ".join(["i%d, s%d, o%d" % (i, i, i) for i in range(nd)])
+    proto.putln("#define %s(type, buf, %s) (type)(%s_imp(buf, %s))" % (name, macroargs, name, macroargs))
+
+    funcargs = ", ".join(["Py_ssize_t i%d, Py_ssize_t s%d, Py_ssize_t o%d" % (i, i, i) for i in range(nd)])
+    proto.putln("static CYTHON_INLINE void* %s_imp(void* buf, %s);" % (name, funcargs))
+    defin.putln(dedent("""
+        static CYTHON_INLINE void* %s_imp(void* buf, %s) {
+          char* ptr = (char*)buf;
+        """) % (name, funcargs) + "".join([dedent("""\
+          ptr += s%d * i%d;
+          if (o%d >= 0) ptr = *((char**)ptr) + o%d;
+        """) % (i, i, i, i) for i in range(nd)]
+        ) + "\nreturn ptr;\n}")
+
+
+def buf_lookup_strided_code(proto, defin, name, nd):
+    """
+    Generates a buffer lookup function for the right number
+    of dimensions. The function gives back a void* at the right location.
+    """
+    # _i_ndex, _s_tride
+    args = ", ".join(["i%d, s%d" % (i, i) for i in range(nd)])
+    offset = " + ".join(["i%d * s%d" % (i, i) for i in range(nd)])
+    proto.putln("#define %s(type, buf, %s) (type)((char*)buf + %s)" % (name, args, offset))
+
+
+def buf_lookup_c_code(proto, defin, name, nd):
+    """
+    Similar to strided lookup, but can assume that the last dimension
+    doesn't need a multiplication as long as.
+    Still we keep the same signature for now.
+    """
+    if nd == 1:
+        proto.putln("#define %s(type, buf, i0, s0) ((type)buf + i0)" % name)
+    else:
+        args = ", ".join(["i%d, s%d" % (i, i) for i in range(nd)])
+        offset = " + ".join(["i%d * s%d" % (i, i) for i in range(nd - 1)])
+        proto.putln("#define %s(type, buf, %s) ((type)((char*)buf + %s) + i%d)" % (name, args, offset, nd - 1))
+
+
+def buf_lookup_fortran_code(proto, defin, name, nd):
+    """
+    Like C lookup, but the first index is optimized instead.
+    """
+    if nd == 1:
+        proto.putln("#define %s(type, buf, i0, s0) ((type)buf + i0)" % name)
+    else:
+        args = ", ".join(["i%d, s%d" % (i, i) for i in range(nd)])
+        offset = " + ".join(["i%d * s%d" % (i, i) for i in range(1, nd)])
+        proto.putln("#define %s(type, buf, %s) ((type)((char*)buf + %s) + i%d)" % (name, args, offset, 0))
+
+
+def mangle_dtype_name(dtype):
+    # Use prefixes to separate user defined types from builtins
+    # (consider "typedef float unsigned_int")
+    if dtype.is_pyobject:
+        return "object"
+    elif dtype.is_ptr:
+        return "ptr"
+    else:
+        if dtype.is_typedef or dtype.is_struct_or_union:
+            prefix = "nn_"
+        else:
+            prefix = ""
+        return prefix + dtype.specialization_name()
+
+def get_type_information_cname(code, dtype, maxdepth=None):
+    """
+    Output the run-time type information (__Pyx_TypeInfo) for given dtype,
+    and return the name of the type info struct.
+
+    Structs with two floats of the same size are encoded as complex numbers.
+    One can separate between complex numbers declared as struct or with native
+    encoding by inspecting to see if the fields field of the type is
+    filled in.
+    """
+    namesuffix = mangle_dtype_name(dtype)
+    name = "__Pyx_TypeInfo_%s" % namesuffix
+    structinfo_name = "__Pyx_StructFields_%s" % namesuffix
+
+    if dtype.is_error: return "<error>"
+
+    # It's critical that walking the type info doesn't use more stack
+    # depth than dtype.struct_nesting_depth() returns, so use an assertion for this
+    if maxdepth is None: maxdepth = dtype.struct_nesting_depth()
+    if maxdepth <= 0:
+        assert False
+
+    if name not in code.globalstate.utility_codes:
+        code.globalstate.utility_codes.add(name)
+        typecode = code.globalstate['typeinfo']
+
+        arraysizes = []
+        if dtype.is_array:
+            while dtype.is_array:
+                arraysizes.append(dtype.size)
+                dtype = dtype.base_type
+
+        complex_possible = dtype.is_struct_or_union and dtype.can_be_complex()
+
+        declcode = dtype.empty_declaration_code()
+        if dtype.is_simple_buffer_dtype():
+            structinfo_name = "NULL"
+        elif dtype.is_struct:
+            struct_scope = dtype.scope
+            if dtype.is_cv_qualified:
+                struct_scope = struct_scope.base_type_scope
+            # Must pre-call all used types in order not to recurse during utility code writing.
+            fields = struct_scope.var_entries
+            assert len(fields) > 0
+            types = [get_type_information_cname(code, f.type, maxdepth - 1)
+                     for f in fields]
+            typecode.putln("static const __Pyx_StructField %s[] = {" % structinfo_name, safe=True)
+
+            if dtype.is_cv_qualified:
+                # roughly speaking, remove "const" from struct_type
+                struct_type = dtype.cv_base_type.empty_declaration_code()
+            else:
+                struct_type = dtype.empty_declaration_code()
+
+            for f, typeinfo in zip(fields, types):
+                typecode.putln('  {&%s, "%s", offsetof(%s, %s)},' %
+                               (typeinfo, f.name, struct_type, f.cname), safe=True)
+
+            typecode.putln('  {NULL, NULL, 0}', safe=True)
+            typecode.putln("};", safe=True)
+        else:
+            assert False
+
+        rep = str(dtype)
+
+        flags = "0"
+        is_unsigned = "0"
+        if dtype is PyrexTypes.c_char_type:
+            is_unsigned = "__PYX_IS_UNSIGNED(%s)" % declcode
+            typegroup = "'H'"
+        elif dtype.is_int:
+            is_unsigned = "__PYX_IS_UNSIGNED(%s)" % declcode
+            typegroup = "%s ? 'U' : 'I'" % is_unsigned
+        elif complex_possible or dtype.is_complex:
+            typegroup = "'C'"
+        elif dtype.is_float:
+            typegroup = "'R'"
+        elif dtype.is_struct:
+            typegroup = "'S'"
+            if dtype.packed:
+                flags = "__PYX_BUF_FLAGS_PACKED_STRUCT"
+        elif dtype.is_pyobject:
+            typegroup = "'O'"
+        else:
+            assert False, dtype
+
+        typeinfo = ('static const __Pyx_TypeInfo %s = '
+                        '{ "%s", %s, sizeof(%s), { %s }, %s, %s, %s, %s };')
+        tup = (name, rep, structinfo_name, declcode,
+               ', '.join([str(x) for x in arraysizes]) or '0', len(arraysizes),
+               typegroup, is_unsigned, flags)
+        typecode.putln(typeinfo % tup, safe=True)
+
+    return name
+
+def load_buffer_utility(util_code_name, context=None, **kwargs):
+    if context is None:
+        return UtilityCode.load(util_code_name, "Buffer.c", **kwargs)
+    else:
+        return TempitaUtilityCode.load(util_code_name, "Buffer.c", context=context, **kwargs)
+
+context = dict(max_dims=Options.buffer_max_dims)
+buffer_struct_declare_code = load_buffer_utility("BufferStructDeclare", context=context)
+buffer_formats_declare_code = load_buffer_utility("BufferFormatStructs")
+
+# Utility function to set the right exception
+# The caller should immediately goto_error
+raise_indexerror_code = load_buffer_utility("BufferIndexError")
+raise_indexerror_nogil = load_buffer_utility("BufferIndexErrorNogil")
+raise_buffer_fallback_code = load_buffer_utility("BufferFallbackError")
+
+acquire_utility_code = load_buffer_utility("BufferGetAndValidate", context=context)
+buffer_format_check_code = load_buffer_utility("BufferFormatCheck", context=context)
+
+# See utility code BufferFormatFromTypeInfo
+_typeinfo_to_format_code = load_buffer_utility("TypeInfoToFormat")

venv/lib/python3.10/site-packages/Cython/Compiler/Builtin.py

@@ -0,0 +1,948 @@
+#
+#   Builtin Definitions
+#
+
+
+from .StringEncoding import EncodedString
+from .Symtab import BuiltinScope, CClassScope, StructOrUnionScope, ModuleScope, Entry
+from .Code import UtilityCode, TempitaUtilityCode
+from .TypeSlots import Signature
+from . import PyrexTypes
+
+
+# C-level implementations of builtin types, functions and methods
+
+iter_next_utility_code = UtilityCode.load("IterNext", "ObjectHandling.c")
+getattr_utility_code = UtilityCode.load("GetAttr", "ObjectHandling.c")
+getattr3_utility_code = UtilityCode.load("GetAttr3", "Builtins.c")
+pyexec_utility_code = UtilityCode.load("PyExec", "Builtins.c")
+pyexec_globals_utility_code = UtilityCode.load("PyExecGlobals", "Builtins.c")
+globals_utility_code = UtilityCode.load("Globals", "Builtins.c")
+include_std_lib_h_utility_code = UtilityCode.load("IncludeStdlibH", "ModuleSetupCode.c")
+pysequence_multiply_utility_code = UtilityCode.load("PySequenceMultiply", "ObjectHandling.c")
+slice_accessor_utility_code = UtilityCode.load("PySliceAccessors", "Builtins.c")
+
+# mapping from builtins to their C-level equivalents
+
+class _BuiltinOverride:
+    def __init__(self, py_name, args, ret_type, cname, py_equiv="*",
+                 utility_code=None, sig=None, func_type=None,
+                 is_strict_signature=False, builtin_return_type=None,
+                 nogil=None, specialiser=None):
+        self.py_name, self.cname, self.py_equiv = py_name, cname, py_equiv
+        self.args, self.ret_type = args, ret_type
+        self.func_type, self.sig = func_type, sig
+        self.builtin_return_type = builtin_return_type
+        self.is_strict_signature = is_strict_signature
+        self.utility_code = utility_code
+        self.nogil = nogil
+        self.specialiser = specialiser
+
+    def build_func_type(self, sig=None, self_arg=None):
+        if sig is None:
+            sig = Signature(self.args, self.ret_type, nogil=self.nogil)
+            sig.exception_check = False  # not needed for the current builtins
+        func_type = sig.function_type(self_arg)
+        if self.is_strict_signature:
+            func_type.is_strict_signature = True
+        if self.builtin_return_type:
+            func_type.return_type = builtin_types[self.builtin_return_type]
+        return func_type
+
+
+class BuiltinAttribute:
+    def __init__(self, py_name, cname=None, field_type=None, field_type_name=None):
+        self.py_name = py_name
+        self.cname = cname or py_name
+        self.field_type_name = field_type_name  # can't do the lookup before the type is declared!
+        self.field_type = field_type
+
+    def declare_in_type(self, self_type):
+        if self.field_type_name is not None:
+            # lazy type lookup
+            field_type = builtin_scope.lookup(self.field_type_name).type
+        else:
+            field_type = self.field_type or PyrexTypes.py_object_type
+        entry = self_type.scope.declare(self.py_name, self.cname, field_type, None, 'private')
+        entry.is_variable = True
+
+
+class BuiltinFunction(_BuiltinOverride):
+    def declare_in_scope(self, scope):
+        func_type, sig = self.func_type, self.sig
+        if func_type is None:
+            func_type = self.build_func_type(sig)
+        scope.declare_builtin_cfunction(
+            self.py_name, func_type, self.cname, self.py_equiv, self.utility_code,
+            specialiser=self.specialiser,
+        )
+
+
+class BuiltinMethod(_BuiltinOverride):
+    def declare_in_type(self, self_type):
+        method_type, sig = self.func_type, self.sig
+        if method_type is None:
+            # override 'self' type (first argument)
+            self_arg = PyrexTypes.CFuncTypeArg("", self_type, None)
+            self_arg.not_none = True
+            self_arg.accept_builtin_subtypes = True
+            method_type = self.build_func_type(sig, self_arg)
+        self_type.scope.declare_builtin_cfunction(
+            self.py_name, method_type, self.cname, utility_code=self.utility_code)
+
+
+class BuiltinProperty:
+    # read only for now
+    def __init__(self, py_name, property_type, call_cname,
+                 exception_value=None, exception_check=None, utility_code=None):
+        self.py_name = py_name
+        self.property_type = property_type
+        self.call_cname = call_cname
+        self.utility_code = utility_code
+        self.exception_value = exception_value
+        self.exception_check = exception_check
+
+    def declare_in_type(self, self_type):
+        self_type.scope.declare_cproperty(
+            self.py_name,
+            self.property_type,
+            self.call_cname,
+            exception_value=self.exception_value,
+            exception_check=self.exception_check,
+            utility_code=self.utility_code
+        )
+
+
+### Special builtin implementations generated at runtime.
+
+def _generate_divmod_function(scope, argument_types):
+    if len(argument_types) != 2:
+        return None
+    type_op1, type_op2 = argument_types
+
+    # Resolve internal typedefs to avoid useless code duplication.
+    if type_op1.is_typedef:
+        type_op1 = type_op1.resolve_known_type()
+    if type_op2.is_typedef:
+        type_op2 = type_op2.resolve_known_type()
+
+    if type_op1.is_float or type_op1 is float_type or type_op2.is_float and (type_op1.is_int or type_op1 is int_type):
+        impl = "float"
+        # TODO: support 'long double'? Currently fails to handle the error return value.
+        number_type = PyrexTypes.c_double_type
+    elif type_op1.is_int and type_op2.is_int:
+        impl = "int"
+        number_type = type_op1 if type_op1.rank >= type_op2.rank else type_op2
+    else:
+        return None
+
+    nogil = scope.nogil
+    cfunc_suffix = f"{'nogil_' if nogil else ''}{impl}_{'td_' if number_type.is_typedef else ''}{number_type.specialization_name()}"
+    function_cname = f"__Pyx_divmod_{cfunc_suffix}"
+
+    # Reuse an existing specialisation, if available.
+    builtin_scope = scope.builtin_scope()
+    existing_entry = builtin_scope.lookup_here("divmod")
+    if existing_entry is not None:
+        for entry in existing_entry.all_alternatives():
+            if entry.cname == function_cname:
+                return entry
+
+    # Generate a new specialisation.
+    ctuple_entry = scope.declare_tuple_type(None, [number_type]*2)
+    ctuple_entry.used = True
+    return_type = ctuple_entry.type
+
+    function_type = PyrexTypes.CFuncType(
+        return_type, [
+            PyrexTypes.CFuncTypeArg("a", number_type, None),
+            PyrexTypes.CFuncTypeArg("b", number_type, None),
+        ],
+        exception_value=f"__Pyx_divmod_ERROR_VALUE_{cfunc_suffix}",
+        exception_check=True,
+        is_strict_signature=True,
+        nogil=nogil,
+    )
+
+    utility_code = TempitaUtilityCode.load(
+        f"divmod_{impl}", "Builtins.c", context={
+            'CFUNC_SUFFIX': cfunc_suffix,
+            'MATH_SUFFIX': number_type.math_h_modifier if number_type.is_float else '',
+            'TYPE': number_type.empty_declaration_code(),
+            'RETURN_TYPE': return_type.empty_declaration_code(),
+            'NOGIL': nogil,
+    })
+
+    entry = builtin_scope.declare_builtin_cfunction(
+        "divmod", function_type, function_cname, utility_code=utility_code)
+
+    return entry
+
+
+### List of builtin functions and their implementation.
+
+builtin_function_table = [
+    # name,        args,   return,  C API func,           py equiv = "*"
+    BuiltinFunction('abs',        "d",    "d",     "fabs",
+                    is_strict_signature=True, nogil=True,
+                    utility_code=include_std_lib_h_utility_code),
+    BuiltinFunction('abs',        "f",    "f",     "fabsf",
+                    is_strict_signature=True, nogil=True,
+                    utility_code=include_std_lib_h_utility_code),
+    BuiltinFunction('abs',        "i",    "i",     "abs",
+                    is_strict_signature=True, nogil=True,
+                    utility_code=include_std_lib_h_utility_code),
+    BuiltinFunction('abs',        "l",    "l",     "labs",
+                    is_strict_signature=True, nogil=True,
+                    utility_code=include_std_lib_h_utility_code),
+    BuiltinFunction('abs',        None,    None,   "__Pyx_abs_longlong",
+                utility_code = UtilityCode.load("abs_longlong", "Builtins.c"),
+                func_type = PyrexTypes.CFuncType(
+                    PyrexTypes.c_longlong_type, [
+                        PyrexTypes.CFuncTypeArg("arg", PyrexTypes.c_longlong_type, None)
+                        ],
+                    is_strict_signature = True, nogil=True)),
+    ] + list(
+        BuiltinFunction('abs',        None,    None,   "/*abs_{}*/".format(t.specialization_name()),
+                    func_type = PyrexTypes.CFuncType(
+                        t,
+                        [PyrexTypes.CFuncTypeArg("arg", t, None)],
+                        is_strict_signature = True, nogil=True))
+                            for t in (PyrexTypes.c_uint_type, PyrexTypes.c_ulong_type, PyrexTypes.c_ulonglong_type)
+             ) + list(
+        BuiltinFunction('abs',        None,    None,   "__Pyx_c_abs{}".format(t.funcsuffix),
+                    func_type = PyrexTypes.CFuncType(
+                        t.real_type, [
+                            PyrexTypes.CFuncTypeArg("arg", t, None)
+                            ],
+                            is_strict_signature = True, nogil=True))
+                        for t in (PyrexTypes.c_float_complex_type,
+                                  PyrexTypes.c_double_complex_type,
+                                  PyrexTypes.c_longdouble_complex_type)
+                        ) + [
+    BuiltinFunction('abs',        "O",    "O",     "__Pyx_PyNumber_Absolute",
+                    utility_code=UtilityCode.load("py_abs", "Builtins.c")),
+    #('all',       "",     "",      ""),
+    #('any',       "",     "",      ""),
+    #('ascii',     "",     "",      ""),
+    #('bin',       "",     "",      ""),
+    BuiltinFunction('callable',   "O",    "b",     "__Pyx_PyCallable_Check",
+                    utility_code = UtilityCode.load("CallableCheck", "ObjectHandling.c")),
+    BuiltinFunction('chr',        "i",    "O",      "PyUnicode_FromOrdinal", builtin_return_type='str'),
+    #('cmp', "",   "",     "",      ""), # int PyObject_Cmp(PyObject *o1, PyObject *o2, int *result)
+    #('compile',   "",     "",      ""), # PyObject* Py_CompileString(    char *str, char *filename, int start)
+    BuiltinFunction('delattr',    "OO",   "r",     "__Pyx_PyObject_DelAttr",
+                    utility_code=UtilityCode.load("PyObjectDelAttr", "ObjectHandling.c")),
+    BuiltinFunction('dir',        "O",    "O",     "PyObject_Dir"),
+    BuiltinFunction('divmod',     "OO",   "O",     "PyNumber_Divmod",
+                    specialiser=_generate_divmod_function),
+    BuiltinFunction('exec',       "O",    "O",     "__Pyx_PyExecGlobals",
+                    utility_code = pyexec_globals_utility_code),
+    BuiltinFunction('exec',       "OO",   "O",     "__Pyx_PyExec2",
+                    utility_code = pyexec_utility_code),
+    BuiltinFunction('exec',       "OOO",  "O",     "__Pyx_PyExec3",
+                    utility_code = pyexec_utility_code),
+    #('eval',      "",     "",      ""),
+    #('execfile',  "",     "",      ""),
+    #('filter',    "",     "",      ""),
+    BuiltinFunction('getattr3',   "OOO",  "O",     "__Pyx_GetAttr3",     "getattr",
+                    utility_code=getattr3_utility_code),  # Pyrex legacy
+    BuiltinFunction('getattr',    "OOO",  "O",     "__Pyx_GetAttr3",
+                    utility_code=getattr3_utility_code),
+    BuiltinFunction('getattr',    "OO",   "O",     "__Pyx_GetAttr",
+                    utility_code=getattr_utility_code),
+    BuiltinFunction('hasattr',    "OO",   "b",     "__Pyx_HasAttr",
+                    utility_code = UtilityCode.load("HasAttr", "Builtins.c")),
+    BuiltinFunction('hash',       "O",    "h",     "PyObject_Hash"),
+    #('hex',       "",     "",      ""),
+    #('id',        "",     "",      ""),
+    #('input',     "",     "",      ""),
+    BuiltinFunction('intern',     "O",    "O",     "__Pyx_Intern",
+                    utility_code = UtilityCode.load("Intern", "Builtins.c")),
+    BuiltinFunction('isinstance', "OO",   "b",     "PyObject_IsInstance"),
+    BuiltinFunction('issubclass', "OO",   "b",     "PyObject_IsSubclass"),
+    BuiltinFunction('iter',       "OO",   "O",     "PyCallIter_New"),
+    BuiltinFunction('iter',       "O",    "O",     "PyObject_GetIter"),
+    BuiltinFunction('len',        "O",    "z",     "PyObject_Length"),
+    BuiltinFunction('locals',     "",     "O",     "__pyx_locals"),
+    #('map',       "",     "",      ""),
+    #('max',       "",     "",      ""),
+    #('min',       "",     "",      ""),
+    BuiltinFunction('next',       "O",    "O",     "__Pyx_PyIter_Next",
+                    utility_code = iter_next_utility_code),   # not available in Py2 => implemented here
+    BuiltinFunction('next',      "OO",    "O",     "__Pyx_PyIter_Next2",
+                    utility_code = iter_next_utility_code),  # not available in Py2 => implemented here
+    #('oct',       "",     "",      ""),
+    #('open',       "ss",   "O",     "PyFile_FromString"),   # not in Py3
+] + [
+    BuiltinFunction('ord',        None,    None,   "__Pyx_long_cast",
+                    func_type=PyrexTypes.CFuncType(
+                        PyrexTypes.c_long_type, [PyrexTypes.CFuncTypeArg("c", c_type, None)],
+                        is_strict_signature=True))
+    for c_type in [PyrexTypes.c_py_ucs4_type, PyrexTypes.c_py_unicode_type]
+] + [
+    BuiltinFunction('ord',        None,    None,   "__Pyx_uchar_cast",
+                    func_type=PyrexTypes.CFuncType(
+                        PyrexTypes.c_uchar_type, [PyrexTypes.CFuncTypeArg("c", c_type, None)],
+                        is_strict_signature=True))
+    for c_type in [PyrexTypes.c_char_type, PyrexTypes.c_schar_type, PyrexTypes.c_uchar_type]
+] + [
+    BuiltinFunction('ord',        None,    None,   "__Pyx_PyObject_Ord",
+                    utility_code=UtilityCode.load_cached("object_ord", "Builtins.c"),
+                    func_type=PyrexTypes.CFuncType(
+                        PyrexTypes.c_long_type, [
+                            PyrexTypes.CFuncTypeArg("c", PyrexTypes.py_object_type, None)
+                        ],
+                        exception_value="(long)(Py_UCS4)-1")),
+    BuiltinFunction('pow',        "OOO",  "O",     "PyNumber_Power"),
+    BuiltinFunction('pow',        "OO",   "O",     "__Pyx_PyNumber_Power2",
+                    utility_code = UtilityCode.load("pow2", "Builtins.c")),
+    #('range',     "",     "",      ""),
+    #('raw_input', "",     "",      ""),
+    #('reduce',    "",     "",      ""),
+    BuiltinFunction('reload',     "O",    "O",     "PyImport_ReloadModule"),
+    BuiltinFunction('repr',       "O",    "O",     "PyObject_Repr", builtin_return_type='str'),
+    #('round',     "",     "",      ""),
+    BuiltinFunction('setattr',    "OOO",  "r",     "PyObject_SetAttr"),
+    #('sum',       "",     "",      ""),
+    #('sorted',    "",     "",      ""),
+    #('type',       "O",    "O",     "PyObject_Type"),
+    BuiltinFunction('unichr',     "i",    "O",      "PyUnicode_FromOrdinal", builtin_return_type='str'),
+    #('vars',      "",     "",      ""),
+    #('zip',       "",     "",      ""),
+    #  Can't do these easily until we have builtin type entries.
+    #('typecheck',  "OO",   "i",     "PyObject_TypeCheck", False),
+    #('issubtype',  "OO",   "i",     "PyType_IsSubtype",   False),
+
+    # Put in namespace append optimization.
+    BuiltinFunction('__Pyx_PyObject_Append', "OO",  "O",     "__Pyx_PyObject_Append"),
+
+    # This is conditionally looked up based on a compiler directive.
+    BuiltinFunction('__Pyx_Globals',    "",     "O",     "__Pyx_Globals",
+                    utility_code=globals_utility_code),
+]
+
+
+# Builtin types
+#  bool
+#  buffer
+#  classmethod
+#  dict
+#  enumerate
+#  file
+#  float
+#  int
+#  list
+#  long
+#  object
+#  property
+#  slice
+#  staticmethod
+#  super
+#  str
+#  tuple
+#  type
+#  xrange
+
+builtin_types_table = [
+
+    ("type",    "&PyType_Type",     []),
+
+# This conflicts with the C++ bool type, and unfortunately
+# C++ is too liberal about PyObject* <-> bool conversions,
+# resulting in unintuitive runtime behavior and segfaults.
+#    ("bool",   "&PyBool_Type",     []),
+
+    ("int",     "&PyLong_Type",     []),
+    ("float",   "&PyFloat_Type",   []),
+
+    ("complex", "&PyComplex_Type", [BuiltinAttribute('cval', field_type_name = 'Py_complex'),
+                                    BuiltinAttribute('real', 'cval.real', field_type = PyrexTypes.c_double_type),
+                                    BuiltinAttribute('imag', 'cval.imag', field_type = PyrexTypes.c_double_type),
+                                    ]),
+
+    ("bytearray", "&PyByteArray_Type", [
+                                    BuiltinMethod("__mul__",  "Tz",   "T", "__Pyx_PySequence_Multiply",
+                                                  utility_code=pysequence_multiply_utility_code),
+                                    ]),
+    ("bytes",   "&PyBytes_Type",   [BuiltinMethod("join",  "TO",   "O", "__Pyx_PyBytes_Join",
+                                                  utility_code=UtilityCode.load("StringJoin", "StringTools.c")),
+                                    BuiltinMethod("__mul__",  "Tz",   "T", "__Pyx_PySequence_Multiply",
+                                                  utility_code=pysequence_multiply_utility_code),
+                                    ]),
+    ("str",     "&PyUnicode_Type", [BuiltinMethod("__contains__",  "TO",   "b", "PyUnicode_Contains"),
+                                    BuiltinMethod("join",  "TO",   "T", "PyUnicode_Join"),
+                                    BuiltinMethod("__mul__",  "Tz",   "T", "__Pyx_PySequence_Multiply",
+                                                  utility_code=pysequence_multiply_utility_code),
+                                    ]),
+
+    ("tuple",  "&PyTuple_Type",    [BuiltinMethod("__mul__", "Tz", "T", "__Pyx_PySequence_Multiply",
+                                                  utility_code=pysequence_multiply_utility_code),
+                                    ]),
+
+    ("list",   "&PyList_Type",     [BuiltinMethod("insert",  "TzO",  "r", "PyList_Insert"),
+                                    BuiltinMethod("reverse", "T",    "r", "PyList_Reverse"),
+                                    BuiltinMethod("append",  "TO",   "r", "__Pyx_PyList_Append",
+                                                  utility_code=UtilityCode.load("ListAppend", "Optimize.c")),
+                                    BuiltinMethod("extend",  "TO",   "r", "__Pyx_PyList_Extend",
+                                                  utility_code=UtilityCode.load("ListExtend", "Optimize.c")),
+                                    BuiltinMethod("__mul__",  "Tz",   "T", "__Pyx_PySequence_Multiply",
+                                                  utility_code=pysequence_multiply_utility_code),
+                                    ]),
+
+    ("dict",   "&PyDict_Type",     [BuiltinMethod("__contains__",  "TO",   "b", "PyDict_Contains"),
+                                    BuiltinMethod("has_key",       "TO",   "b", "PyDict_Contains"),
+                                    BuiltinMethod("items",  "T",   "O", "__Pyx_PyDict_Items",
+                                                  utility_code=UtilityCode.load("py_dict_items", "Builtins.c")),
+                                    BuiltinMethod("keys",   "T",   "O", "__Pyx_PyDict_Keys",
+                                                  utility_code=UtilityCode.load("py_dict_keys", "Builtins.c")),
+                                    BuiltinMethod("values", "T",   "O", "__Pyx_PyDict_Values",
+                                                  utility_code=UtilityCode.load("py_dict_values", "Builtins.c")),
+                                    BuiltinMethod("iteritems",  "T",   "O", "__Pyx_PyDict_IterItems",
+                                                  utility_code=UtilityCode.load("py_dict_iteritems", "Builtins.c")),
+                                    BuiltinMethod("iterkeys",   "T",   "O", "__Pyx_PyDict_IterKeys",
+                                                  utility_code=UtilityCode.load("py_dict_iterkeys", "Builtins.c")),
+                                    BuiltinMethod("itervalues", "T",   "O", "__Pyx_PyDict_IterValues",
+                                                  utility_code=UtilityCode.load("py_dict_itervalues", "Builtins.c")),
+                                    BuiltinMethod("viewitems",  "T",   "O", "__Pyx_PyDict_ViewItems",
+                                                  utility_code=UtilityCode.load("py_dict_viewitems", "Builtins.c")),
+                                    BuiltinMethod("viewkeys",   "T",   "O", "__Pyx_PyDict_ViewKeys",
+                                                  utility_code=UtilityCode.load("py_dict_viewkeys", "Builtins.c")),
+                                    BuiltinMethod("viewvalues", "T",   "O", "__Pyx_PyDict_ViewValues",
+                                                  utility_code=UtilityCode.load("py_dict_viewvalues", "Builtins.c")),
+                                    BuiltinMethod("clear",  "T",   "r", "__Pyx_PyDict_Clear",
+                                                  utility_code=UtilityCode.load("py_dict_clear", "Optimize.c")),
+                                    BuiltinMethod("copy",   "T",   "T", "PyDict_Copy")]),
+
+    ("slice",  "&PySlice_Type",    [BuiltinProperty("start", PyrexTypes.py_object_type, '__Pyx_PySlice_Start',
+                                                    utility_code=slice_accessor_utility_code),
+                                    BuiltinProperty("stop", PyrexTypes.py_object_type, '__Pyx_PySlice_Stop',
+                                                    utility_code=slice_accessor_utility_code),
+                                    BuiltinProperty("step", PyrexTypes.py_object_type, '__Pyx_PySlice_Step',
+                                                    utility_code=slice_accessor_utility_code),
+                                    ]),
+
+    ("set",      "&PySet_Type",    [BuiltinMethod("clear",   "T",  "r", "PySet_Clear"),
+                                    # discard() and remove() have a special treatment for unhashable values
+                                    BuiltinMethod("discard", "TO", "r", "__Pyx_PySet_Discard",
+                                                  utility_code=UtilityCode.load("py_set_discard", "Optimize.c")),
+                                    BuiltinMethod("remove",  "TO", "r", "__Pyx_PySet_Remove",
+                                                  utility_code=UtilityCode.load("py_set_remove", "Optimize.c")),
+                                    # update is actually variadic (see Github issue #1645)
+#                                    BuiltinMethod("update",     "TO", "r", "__Pyx_PySet_Update",
+#                                                  utility_code=UtilityCode.load_cached("PySet_Update", "Builtins.c")),
+                                    BuiltinMethod("add",     "TO", "r", "PySet_Add"),
+                                    BuiltinMethod("pop",     "T",  "O", "PySet_Pop")]),
+    ("frozenset", "&PyFrozenSet_Type", []),
+    ("BaseException", "((PyTypeObject*)PyExc_BaseException)", []),
+    ("Exception", "((PyTypeObject*)PyExc_Exception)", []),
+    ("memoryview", "&PyMemoryView_Type", [
+        # TODO - format would be nice, but hard to get
+        # __len__ can be accessed through a direct lookup of the buffer (but probably in Optimize.c)
+        # error checking would ideally be limited api only
+        BuiltinProperty("ndim", PyrexTypes.c_int_type, '__Pyx_PyMemoryView_Get_ndim',
+                        exception_value=-1, exception_check=True,
+                        utility_code=TempitaUtilityCode.load_cached(
+                            "memoryview_get_from_buffer", "Builtins.c",
+                            context=dict(name="ndim")
+                        )
+        ),
+        BuiltinProperty("readonly", PyrexTypes.c_bint_type, '__Pyx_PyMemoryView_Get_readonly',
+                        exception_value=-1, exception_check=True,
+                        utility_code=TempitaUtilityCode.load_cached(
+                            "memoryview_get_from_buffer", "Builtins.c",
+                            context=dict(name="readonly")
+                        )
+        ),
+        BuiltinProperty("itemsize", PyrexTypes.c_py_ssize_t_type, '__Pyx_PyMemoryView_Get_itemsize',
+                        exception_value=-1, exception_check=True,
+                        utility_code=TempitaUtilityCode.load_cached(
+                            "memoryview_get_from_buffer", "Builtins.c",
+                            context=dict(name="itemsize")
+                        )
+        )]
+    )
+]
+
+
+types_that_construct_their_instance = frozenset({
+    # some builtin types do not always return an instance of
+    # themselves - these do:
+    'type', 'bool', 'int', 'float', 'complex',
+    'bytes', 'unicode', 'bytearray', 'str',
+    'tuple', 'list', 'dict', 'set', 'frozenset',
+    'memoryview'
+})
+
+
+# When updating this mapping, also update "unsafe_compile_time_methods" below
+# if methods are added that are not safe to evaluate at compile time.
+inferred_method_return_types = {
+    'complex': dict(
+        conjugate='complex',
+    ),
+    'int': dict(
+        as_integer_ratio='tuple[int,int]',
+        bit_count='T',
+        bit_length='T',
+        conjugate='T',
+        from_bytes='T',  # classmethod
+        is_integer='bint',
+        to_bytes='bytes',
+    ),
+    'float': dict(
+        as_integer_ratio='tuple[int,int]',
+        conjugate='T',
+        fromhex='T',  # classmethod
+        hex='str',
+        is_integer='bint',
+    ),
+    'list': dict(
+        copy='T',
+        count='Py_ssize_t',
+        index='Py_ssize_t',
+    ),
+    'tuple': dict(
+        count='Py_ssize_t',
+        index='Py_ssize_t',
+    ),
+    'str': dict(
+        capitalize='T',
+        casefold='T',
+        center='T',
+        count='Py_ssize_t',
+        encode='bytes',
+        endswith='bint',
+        expandtabs='T',
+        find='Py_ssize_t',
+        format='T',
+        format_map='T',
+        index='Py_ssize_t',
+        isalnum='bint',
+        isalpha='bint',
+        isascii='bint',
+        isdecimal='bint',
+        isdigit='bint',
+        isidentifier='bint',
+        islower='bint',
+        isnumeric='bint',
+        isprintable='bint',
+        isspace='bint',
+        istitle='bint',
+        isupper='bint',
+        join='T',
+        ljust='T',
+        lower='T',
+        lstrip='T',
+        maketrans='dict[int,object]',  # staticmethod
+        partition='tuple[T,T,T]',
+        removeprefix='T',
+        removesuffix='T',
+        replace='T',
+        rfind='Py_ssize_t',
+        rindex='Py_ssize_t',
+        rjust='T',
+        rpartition='tuple[T,T,T]',
+        rsplit='list[T]',
+        rstrip='T',
+        split='list[T]',
+        splitlines='list[T]',
+        startswith='bint',
+        strip='T',
+        swapcase='T',
+        title='T',
+        translate='T',
+        upper='T',
+        zfill='T',
+    ),
+    'bytes': dict(
+        capitalize='T',
+        center='T',
+        count='Py_ssize_t',
+        decode='str',
+        endswith='bint',
+        expandtabs='T',
+        find='Py_ssize_t',
+        fromhex='T',  # classmethod
+        hex='str',
+        index='Py_ssize_t',
+        isalnum='bint',
+        isalpha='bint',
+        isascii='bint',
+        isdigit='bint',
+        islower='bint',
+        isspace='bint',
+        istitle='bint',
+        isupper='bint',
+        join='T',
+        ljust='T',
+        lower='T',
+        lstrip='T',
+        maketrans='bytes',  # staticmethod
+        partition='tuple[T,T,T]',
+        removeprefix='T',
+        removesuffix='T',
+        replace='T',
+        rfind='Py_ssize_t',
+        rindex='Py_ssize_t',
+        rjust='T',
+        rpartition='tuple[T,T,T]',
+        rsplit='list[T]',
+        rstrip='T',
+        split='list[T]',
+        splitlines='list[T]',
+        startswith='bint',
+        strip='T',
+        swapcase='T',
+        title='T',
+        translate='T',
+        upper='T',
+        zfill='T',
+    ),
+    'bytearray': dict(
+        # Inherited from 'bytes' below.
+    ),
+    'memoryview': dict(
+        cast='T',
+        hex='str',
+        tobytes='bytes',
+        tolist='list',
+        toreadonly='T',
+    ),
+    'set': dict(
+        copy='T',
+        difference='T',
+        intersection='T',
+        isdisjoint='bint',
+        issubset='bint',
+        issuperset='bint',
+        symmetric_difference='T',
+        union='T',
+    ),
+    'frozenset': dict(
+        # Inherited from 'set' below.
+    ),
+    'dict': dict(
+        copy='T',
+        fromkeys='T',  # classmethod
+        popitem='tuple',
+    ),
+}
+
+inferred_method_return_types['bytearray'].update(inferred_method_return_types['bytes'])
+inferred_method_return_types['frozenset'].update(inferred_method_return_types['set'])
+
+
+def find_return_type_of_builtin_method(builtin_type, method_name):
+    type_name = builtin_type.name
+    if type_name in inferred_method_return_types:
+        methods = inferred_method_return_types[type_name]
+        if method_name in methods:
+            return_type_name = methods[method_name]
+            if '[' in return_type_name:
+                # TODO: Keep the "[...]" part when we add support for generics.
+                return_type_name = return_type_name.partition('[')[0]
+            if return_type_name == 'T':
+                return builtin_type
+            if 'T' in return_type_name:
+                return_type_name = return_type_name.replace('T', builtin_type.name)
+            if return_type_name == 'bint':
+                return PyrexTypes.c_bint_type
+            elif return_type_name == 'Py_ssize_t':
+                return PyrexTypes.c_py_ssize_t_type
+            return builtin_scope.lookup(return_type_name).type
+    return PyrexTypes.py_object_type
+
+
+unsafe_compile_time_methods = {
+    # We name here only unsafe and non-portable methods if:
+    # - the type has a literal representation, allowing for constant folding.
+    # - the return type is not None (thus excluding modifier methods)
+    #   and is listed in 'inferred_method_return_types' above.
+    #
+    # See the consistency check in TestBuiltin.py.
+    #
+    'complex': set(),
+    'int': {
+        'bit_count',  # Py3.10+
+        'from_bytes',  # classmethod
+        'is_integer',  # Py3.12+
+        'to_bytes',  # changed in Py3.11
+    },
+    'float': {
+        'fromhex',  # classmethod
+    },
+    'list': {
+        'copy',
+    },
+    'tuple': set(),
+    'str': {
+        'replace',  # changed in Py3.13+
+        'maketrans',  # staticmethod
+        'removeprefix',  # Py3.9+
+        'removesuffix',  # Py3.9+
+    },
+    'bytes': {
+        'fromhex',  # classmethod
+        'maketrans',  # staticmethod
+        'removeprefix',  # Py3.9+
+        'removesuffix',  # Py3.9+
+    },
+    'set': set(),
+}
+
+
+def is_safe_compile_time_method(builtin_type_name: str, method_name: str):
+    unsafe_methods = unsafe_compile_time_methods.get(builtin_type_name)
+    if unsafe_methods is None:
+        # Not a literal type.
+        return False
+    if method_name in unsafe_methods:
+        # Not a safe method.
+        return False
+    known_methods = inferred_method_return_types.get(builtin_type_name)
+    if known_methods is None or method_name not in known_methods:
+        # Not a known method.
+        return False
+    return True
+
+
+builtin_structs_table = [
+    ('Py_buffer', 'Py_buffer',
+     [("buf",        PyrexTypes.c_void_ptr_type),
+      ("obj",        PyrexTypes.py_object_type),
+      ("len",        PyrexTypes.c_py_ssize_t_type),
+      ("itemsize",   PyrexTypes.c_py_ssize_t_type),
+      ("readonly",   PyrexTypes.c_bint_type),
+      ("ndim",       PyrexTypes.c_int_type),
+      ("format",     PyrexTypes.c_char_ptr_type),
+      ("shape",      PyrexTypes.c_py_ssize_t_ptr_type),
+      ("strides",    PyrexTypes.c_py_ssize_t_ptr_type),
+      ("suboffsets", PyrexTypes.c_py_ssize_t_ptr_type),
+      ("smalltable", PyrexTypes.CArrayType(PyrexTypes.c_py_ssize_t_type, 2)),
+      ("internal",   PyrexTypes.c_void_ptr_type),
+      ]),
+    ('Py_complex', 'Py_complex',
+     [('real', PyrexTypes.c_double_type),
+      ('imag', PyrexTypes.c_double_type),
+      ])
+]
+
+# set up builtin scope
+
+builtin_scope = BuiltinScope()
+
+def init_builtin_funcs():
+    for bf in builtin_function_table:
+        bf.declare_in_scope(builtin_scope)
+
+builtin_types = {}
+
+def init_builtin_types():
+    global builtin_types
+    for name, cname, methods in builtin_types_table:
+        if name == 'frozenset':
+            objstruct_cname = 'PySetObject'
+        elif name == 'bytearray':
+            objstruct_cname = 'PyByteArrayObject'
+        elif name == 'int':
+            objstruct_cname = 'PyLongObject'
+        elif name == 'str':
+            objstruct_cname = 'PyUnicodeObject'
+        elif name == 'bool':
+            objstruct_cname = 'PyLongObject'
+        elif name == 'BaseException':
+            objstruct_cname = "PyBaseExceptionObject"
+        elif name == 'Exception':
+            objstruct_cname = "PyBaseExceptionObject"
+        else:
+            objstruct_cname = 'Py%sObject' % name.capitalize()
+        type_class = PyrexTypes.BuiltinObjectType
+        if name in ['dict', 'list', 'set', 'frozenset']:
+            type_class = PyrexTypes.BuiltinTypeConstructorObjectType
+        elif name == 'tuple':
+            type_class = PyrexTypes.PythonTupleTypeConstructor
+        the_type = builtin_scope.declare_builtin_type(
+            name, cname, objstruct_cname=objstruct_cname, type_class=type_class)
+        builtin_types[name] = the_type
+        for method in methods:
+            method.declare_in_type(the_type)
+
+
+def init_builtin_structs():
+    for name, cname, attribute_types in builtin_structs_table:
+        scope = StructOrUnionScope(name)
+        for attribute_name, attribute_type in attribute_types:
+            scope.declare_var(attribute_name, attribute_type, None,
+                              attribute_name, allow_pyobject=True)
+        builtin_scope.declare_struct_or_union(
+            name, "struct", scope, 1, None, cname = cname)
+
+
+def init_builtins():
+    #Errors.init_thread()  # hopefully not needed - we should not emit warnings ourselves
+    init_builtin_structs()
+    init_builtin_types()
+    init_builtin_funcs()
+
+    entry = builtin_scope.declare_var(
+        '__debug__', PyrexTypes.c_const_type(PyrexTypes.c_bint_type),
+        pos=None, cname='__pyx_assertions_enabled()', is_cdef=True)
+    entry.utility_code = UtilityCode.load_cached("AssertionsEnabled", "Exceptions.c")
+
+    global type_type, list_type, tuple_type, dict_type, set_type, frozenset_type, slice_type
+    global bytes_type, unicode_type, bytearray_type
+    global float_type, int_type, bool_type, complex_type
+    global memoryview_type, py_buffer_type
+    global sequence_types
+    type_type  = builtin_scope.lookup('type').type
+    list_type  = builtin_scope.lookup('list').type
+    tuple_type = builtin_scope.lookup('tuple').type
+    dict_type  = builtin_scope.lookup('dict').type
+    set_type   = builtin_scope.lookup('set').type
+    frozenset_type = builtin_scope.lookup('frozenset').type
+    slice_type   = builtin_scope.lookup('slice').type
+
+    bytes_type = builtin_scope.lookup('bytes').type
+    unicode_type = builtin_scope.lookup('str').type
+    bytearray_type = builtin_scope.lookup('bytearray').type
+    memoryview_type = builtin_scope.lookup('memoryview').type
+
+    float_type = builtin_scope.lookup('float').type
+    int_type = builtin_scope.lookup('int').type
+    #bool_type  = builtin_scope.lookup('bool').type
+    complex_type  = builtin_scope.lookup('complex').type
+
+    # Most entries are initialized via "declare_builtin_type()"", except for "bool"
+    # which is apparently a special case because it conflicts with C++ bool.
+    # Here, we only declare it as builtin name, not as actual type.
+    bool_type = PyrexTypes.BuiltinObjectType(EncodedString('bool'), "((PyObject*)&PyBool_Type)", "PyLongObject")
+    scope = CClassScope('bool', outer_scope=None, visibility='extern', parent_type=bool_type)
+    bool_type.set_scope(scope)
+    bool_type.is_final_type = True
+    bool_type.entry = builtin_scope.declare_var(EncodedString('bool'), bool_type, pos=None, cname="((PyObject*)&PyBool_Type)")
+    builtin_types['bool'] = bool_type
+
+    sequence_types = (
+        list_type,
+        tuple_type,
+        bytes_type,
+        unicode_type,
+        bytearray_type,
+        memoryview_type,
+    )
+
+    # Set up type inference links between equivalent Python/C types
+    assert bool_type.name == 'bool', bool_type.name
+    bool_type.equivalent_type = PyrexTypes.c_bint_type
+    PyrexTypes.c_bint_type.equivalent_type = bool_type
+
+    assert float_type.name == 'float', float_type.name
+    float_type.equivalent_type = PyrexTypes.c_double_type
+    PyrexTypes.c_double_type.equivalent_type = float_type
+
+    assert complex_type.name == 'complex', complex_type.name
+    complex_type.equivalent_type = PyrexTypes.c_double_complex_type
+    PyrexTypes.c_double_complex_type.equivalent_type = complex_type
+
+    py_buffer_type = builtin_scope.lookup('Py_buffer').type
+
+
+init_builtins()
+
+##############################
+# Support for a few standard library modules that Cython understands (currently typing and dataclasses)
+##############################
+_known_module_scopes = {}
+
+def get_known_standard_library_module_scope(module_name):
+    mod = _known_module_scopes.get(module_name)
+    if mod:
+        return mod
+
+    if module_name == "typing":
+        mod = ModuleScope(module_name, None, None)
+        for name, tp in [
+                ('Dict', dict_type),
+                ('List', list_type),
+                ('Tuple', tuple_type),
+                ('Set', set_type),
+                ('FrozenSet', frozenset_type),
+                ]:
+            name = EncodedString(name)
+            entry = mod.declare_type(name, tp, pos = None)
+            var_entry = Entry(name, None, PyrexTypes.py_object_type)
+            var_entry.is_pyglobal = True
+            var_entry.is_variable = True
+            var_entry.scope = mod
+            entry.as_variable = var_entry
+            entry.known_standard_library_import = "%s.%s" % (module_name, name)
+
+        for name in ['ClassVar', 'Optional', 'Union']:
+            name = EncodedString(name)
+            indexed_type = PyrexTypes.SpecialPythonTypeConstructor(EncodedString("typing."+name))
+            entry = mod.declare_type(name, indexed_type, pos = None)
+            var_entry = Entry(name, None, PyrexTypes.py_object_type)
+            var_entry.is_pyglobal = True
+            var_entry.is_variable = True
+            var_entry.scope = mod
+            entry.as_variable = var_entry
+            entry.known_standard_library_import = "%s.%s" % (module_name, name)
+        _known_module_scopes[module_name] = mod
+    elif module_name == "dataclasses":
+        mod = ModuleScope(module_name, None, None)
+        indexed_type = PyrexTypes.SpecialPythonTypeConstructor(EncodedString("dataclasses.InitVar"))
+        initvar_string = EncodedString("InitVar")
+        entry = mod.declare_type(initvar_string, indexed_type, pos = None)
+        var_entry = Entry(initvar_string, None, PyrexTypes.py_object_type)
+        var_entry.is_pyglobal = True
+        var_entry.scope = mod
+        entry.as_variable = var_entry
+        entry.known_standard_library_import = "%s.InitVar" % module_name
+        for name in ["dataclass", "field"]:
+            mod.declare_var(EncodedString(name), PyrexTypes.py_object_type, pos=None)
+        _known_module_scopes[module_name] = mod
+    elif module_name == "functools":
+        mod = ModuleScope(module_name, None, None)
+        for name in ["total_ordering"]:
+            mod.declare_var(EncodedString(name), PyrexTypes.py_object_type, pos=None)
+        _known_module_scopes[module_name] = mod
+
+    return mod
+
+
+def get_known_standard_library_entry(qualified_name):
+    name_parts = qualified_name.split(".")
+    module_name = EncodedString(name_parts[0])
+    rest = name_parts[1:]
+
+    if len(rest) > 1:  # for now, we don't know how to deal with any nested modules
+        return None
+
+    mod = get_known_standard_library_module_scope(module_name)
+
+    # eventually handle more sophisticated multiple lookups if needed
+    if mod and rest:
+        return mod.lookup_here(rest[0])
+    return None
+
+
+def exprnode_to_known_standard_library_name(node, env):
+    qualified_name_parts = []
+    known_name = None
+    while node.is_attribute:
+        qualified_name_parts.append(node.attribute)
+        node = node.obj
+    if node.is_name:
+        entry = env.lookup(node.name)
+        if entry and entry.known_standard_library_import:
+            if get_known_standard_library_entry(
+                    entry.known_standard_library_import):
+                known_name = entry.known_standard_library_import
+            else:
+                standard_env = get_known_standard_library_module_scope(
+                    entry.known_standard_library_import)
+                if standard_env:
+                    qualified_name_parts.append(standard_env.name)
+                    known_name = ".".join(reversed(qualified_name_parts))
+    return known_name

venv/lib/python3.10/site-packages/Cython/Compiler/CmdLine.py

@@ -0,0 +1,259 @@
+#
+#   Cython - Command Line Parsing
+#
+
+
+import os
+from argparse import ArgumentParser, Action, SUPPRESS, RawDescriptionHelpFormatter
+from . import Options
+
+
+class ParseDirectivesAction(Action):
+    def __call__(self, parser, namespace, values, option_string=None):
+        old_directives = dict(getattr(namespace, self.dest,
+                                      Options.get_directive_defaults()))
+        directives = Options.parse_directive_list(
+            values, relaxed_bool=True, current_settings=old_directives)
+        setattr(namespace, self.dest, directives)
+
+
+class ParseOptionsAction(Action):
+    def __call__(self, parser, namespace, values, option_string=None):
+        options = dict(getattr(namespace, self.dest, {}))
+        for opt in values.split(','):
+            if '=' in opt:
+                n, v = opt.split('=', 1)
+                v = v.lower() not in ('false', 'f', '0', 'no')
+            else:
+                n, v = opt, True
+            options[n] = v
+        setattr(namespace, self.dest, options)
+
+
+class ParseCompileTimeEnvAction(Action):
+    def __call__(self, parser, namespace, values, option_string=None):
+        old_env = dict(getattr(namespace, self.dest, {}))
+        new_env = Options.parse_compile_time_env(values, current_settings=old_env)
+        setattr(namespace, self.dest, new_env)
+
+
+class ActivateAllWarningsAction(Action):
+    def __call__(self, parser, namespace, values, option_string=None):
+        directives = getattr(namespace, 'compiler_directives', {})
+        directives.update(Options.extra_warnings)
+        namespace.compiler_directives = directives
+
+
+class SetLenientAction(Action):
+    def __call__(self, parser, namespace, values, option_string=None):
+        namespace.error_on_unknown_names = False
+        namespace.error_on_uninitialized = False
+
+
+class SetGDBDebugAction(Action):
+    def __call__(self, parser, namespace, values, option_string=None):
+        namespace.gdb_debug = True
+        namespace.output_dir = os.curdir
+
+
+class SetGDBDebugOutputAction(Action):
+    def __call__(self, parser, namespace, values, option_string=None):
+        namespace.gdb_debug = True
+        namespace.output_dir = values
+
+
+class SetAnnotateCoverageAction(Action):
+    def __call__(self, parser, namespace, values, option_string=None):
+        namespace.annotate = True
+        namespace.annotate_coverage_xml = values
+
+def create_cython_argparser():
+    description = "Cython (https://cython.org/) is a compiler for code written in the "\
+                  "Cython language.  Cython is based on Pyrex by Greg Ewing."
+
+    parser = ArgumentParser(
+        description=description,
+        argument_default=SUPPRESS,
+        formatter_class=RawDescriptionHelpFormatter,
+        epilog="""\
+Environment variables:
+  CYTHON_CACHE_DIR: the base directory containing Cython's caches."""
+    )
+
+    parser.add_argument("-V", "--version", dest='show_version', action='store_const', const=1,
+                      help='Display version number of cython compiler')
+    parser.add_argument("-l", "--create-listing", dest='use_listing_file', action='store_const', const=1,
+                      help='Write error messages to a listing file')
+    parser.add_argument("-I", "--include-dir", dest='include_path', action='append',
+                      help='Search for include files in named directory '
+                           '(multiple include directories are allowed).')
+    parser.add_argument("-o", "--output-file", dest='output_file', action='store', type=str,
+                      help='Specify name of generated C file')
+    parser.add_argument("-t", "--timestamps", dest='timestamps', action='store_const', const=1,
+                      help='Only compile newer source files')
+    parser.add_argument("-f", "--force", dest='timestamps', action='store_const', const=0,
+                      help='Compile all source files (overrides implied -t)')
+    parser.add_argument("-v", "--verbose", dest='verbose', action='count',
+                      help='Be verbose, print file names on multiple compilation')
+    parser.add_argument("-p", "--embed-positions", dest='embed_pos_in_docstring', action='store_const', const=1,
+                      help='If specified, the positions in Cython files of each '
+                           'function definition is embedded in its docstring.')
+    parser.add_argument("--cleanup", dest='generate_cleanup_code', action='store', type=int,
+                      help='Release interned objects on python exit, for memory debugging. '
+                           'Level indicates aggressiveness, default 0 releases nothing.')
+    parser.add_argument("--cache", dest='cache', action='store_true',
+                      help='Enables Cython compilation cache.')
+    parser.add_argument("-w", "--working", dest='working_path', action='store', type=str,
+                      help='Sets the working directory for Cython (the directory modules are searched from)')
+    parser.add_argument("--gdb", action=SetGDBDebugAction, nargs=0,
+                      help='Output debug information for cygdb')
+    parser.add_argument("--gdb-outdir", action=SetGDBDebugOutputAction, type=str,
+                      help='Specify gdb debug information output directory. Implies --gdb.')
+    parser.add_argument("-D", "--no-docstrings", dest='docstrings', action='store_false',
+                      help='Strip docstrings from the compiled module.')
+    parser.add_argument('-a', '--annotate', action='store_const', const='default', dest='annotate',
+                      help='Produce a colorized HTML version of the source.')
+    parser.add_argument('--annotate-fullc', action='store_const', const='fullc', dest='annotate',
+                      help='Produce a colorized HTML version of the source '
+                           'which includes entire generated C/C++-code.')
+    parser.add_argument("--annotate-coverage", dest='annotate_coverage_xml', action=SetAnnotateCoverageAction, type=str,
+                      help='Annotate and include coverage information from cov.xml.')
+    parser.add_argument("--line-directives", dest='emit_linenums', action='store_true',
+                      help='Produce #line directives pointing to the .pyx source')
+    parser.add_argument("-+", "--cplus", dest='cplus', action='store_const', const=1,
+                      help='Output a C++ rather than C file.')
+    parser.add_argument('--embed', action='store_const', const='main',
+                      help='Generate a main() function that embeds the Python interpreter. '
+                           'Pass --embed=<method_name> for a name other than main().')
+    parser.add_argument('-2', dest='language_level', action='store_const', const=2,
+                      help='Compile based on Python-2 syntax and code semantics.')
+    parser.add_argument('-3', dest='language_level', action='store_const', const=3,
+                      help='Compile based on Python-3 syntax and code semantics.')
+    parser.add_argument('--3str', dest='language_level', action='store_const', const='3',
+                      help='Compile based on Python-3 syntax and code semantics (same as -3 since Cython 3.1).')
+    parser.add_argument("--lenient", action=SetLenientAction, nargs=0,
+                      help='Change some compile time errors to runtime errors to '
+                           'improve Python compatibility')
+    parser.add_argument("--capi-reexport-cincludes", dest='capi_reexport_cincludes', action='store_true',
+                      help='Add cincluded headers to any auto-generated header files.')
+    parser.add_argument("--fast-fail", dest='fast_fail', action='store_true',
+                      help='Abort the compilation on the first error')
+    parser.add_argument("-Werror", "--warning-errors", dest='warning_errors', action='store_true',
+                      help='Make all warnings into errors')
+    parser.add_argument("-Wextra", "--warning-extra", action=ActivateAllWarningsAction, nargs=0,
+                      help='Enable extra warnings')
+
+    parser.add_argument('-X', '--directive', metavar='NAME=VALUE,...',
+                      dest='compiler_directives', type=str,
+                      action=ParseDirectivesAction,
+                      help='Overrides a compiler directive')
+    parser.add_argument('-E', '--compile-time-env', metavar='NAME=VALUE,...',
+                      dest='compile_time_env', type=str,
+                      action=ParseCompileTimeEnvAction,
+                      help='Provides compile time env like DEF would do.')
+    parser.add_argument("--module-name",
+                      dest='module_name', type=str, action='store',
+                      help='Fully qualified module name. If not given, is '
+                           'deduced from the import path if source file is in '
+                           'a package, or equals the filename otherwise.')
+    parser.add_argument('-M', '--depfile', action='store_true', help='produce depfiles for the sources')
+    parser.add_argument("--generate-shared", dest='shared_c_file_path', action='store', type=str,
+                        help='Generates shared module with specified name.')
+    parser.add_argument("--shared", dest='shared_utility_qualified_name', action='store', type=str,
+                        help='Imports utility code from shared module specified by fully qualified module name.')
+
+    parser.add_argument('sources', nargs='*', default=[])
+
+    # TODO: add help
+    parser.add_argument("-z", "--pre-import", dest='pre_import', action='store', type=str, help=SUPPRESS)
+    parser.add_argument("--convert-range", dest='convert_range', action='store_true', help=SUPPRESS)
+    parser.add_argument("--no-c-in-traceback", dest='c_line_in_traceback', action='store_false', help=SUPPRESS)
+    parser.add_argument("--cimport-from-pyx", dest='cimport_from_pyx', action='store_true', help=SUPPRESS)
+    parser.add_argument("--old-style-globals", dest='old_style_globals', action='store_true', help=SUPPRESS)
+
+    # debug stuff:
+    from . import DebugFlags
+    for name in vars(DebugFlags):
+        if name.startswith("debug"):
+            option_name = name.replace('_', '-')
+            parser.add_argument("--" + option_name, action='store_true', help=SUPPRESS)
+
+    return parser
+
+
+def parse_command_line_raw(parser, args):
+    # special handling for --embed and --embed=xxxx as they aren't correctly parsed
+    def filter_out_embed_options(args):
+        with_embed, without_embed = [], []
+        for x in args:
+            if x == '--embed' or x.startswith('--embed='):
+                with_embed.append(x)
+            else:
+                without_embed.append(x)
+        return with_embed, without_embed
+
+    with_embed, args_without_embed = filter_out_embed_options(args)
+
+    arguments, unknown = parser.parse_known_args(args_without_embed)
+
+    sources = arguments.sources
+    del arguments.sources
+
+    # unknown can be either debug, embed or input files or really unknown
+    for option in unknown:
+        if option.startswith('-'):
+            parser.error("unknown option " + option)
+        else:
+            sources.append(option)
+
+    # embed-stuff must be handled extra:
+    for x in with_embed:
+        if x == '--embed':
+            name = 'main'  # default value
+        else:
+            name = x[len('--embed='):]
+        setattr(arguments, 'embed', name)
+
+    return arguments, sources
+
+
+def parse_command_line(args):
+    parser = create_cython_argparser()
+    arguments, sources = parse_command_line_raw(parser, args)
+
+    work_dir = getattr(arguments, 'working_path', '')
+    for source in sources:
+        if work_dir and not os.path.isabs(source):
+            source = os.path.join(work_dir, source)
+        if not os.path.exists(source):
+            import errno
+            raise FileNotFoundError(errno.ENOENT, os.strerror(errno.ENOENT), source)
+
+    options = Options.CompilationOptions(Options.default_options)
+    for name, value in vars(arguments).items():
+        if name.startswith('debug'):
+            from . import DebugFlags
+            if name in dir(DebugFlags):
+                setattr(DebugFlags, name, value)
+            else:
+                parser.error("Unknown debug flag: %s\n" % name)
+        elif hasattr(Options, name):
+            setattr(Options, name, value)
+        else:
+            setattr(options, name, value)
+
+    if options.use_listing_file and len(sources) > 1:
+        parser.error("cython: Only one source file allowed when using -o\n")
+    if options.shared_c_file_path:
+        if len(sources) > 0:
+            parser.error("cython: Source file not allowed when using --generate-shared\n")
+    elif len(sources) == 0 and not options.show_version:
+        parser.error("cython: Need at least one source file\n")
+    if Options.embed and len(sources) > 1:
+        parser.error("cython: Only one source file allowed when using --embed\n")
+    if options.module_name:
+        if options.timestamps:
+            parser.error("cython: Cannot use --module-name with --timestamps\n")
+        if len(sources) > 1:
+            parser.error("cython: Only one source file allowed when using --module-name\n")
+    return options, sources

venv/lib/python3.10/site-packages/Cython/Compiler/Code.pxd

@@ -0,0 +1,148 @@
+cimport cython
+from ..StringIOTree cimport StringIOTree
+
+
+cdef class AbstractUtilityCode:
+    pass
+
+
+cdef class UtilityCodeBase(AbstractUtilityCode):
+    cpdef format_code(self, code_string, replace_empty_lines=*)
+
+
+cdef class UtilityCode(UtilityCodeBase):
+    cdef public object name
+    cdef public object proto
+    cdef public object impl
+    cdef public object init
+    cdef public object cleanup
+    cdef public object proto_block
+    cdef public object module_state_decls
+    cdef public object requires
+    cdef public dict _cache
+    cdef public list specialize_list
+    cdef public object file
+    cdef public tuple _parts_tuple
+
+    cpdef none_or_sub(self, s, context)
+    # TODO - Signature not compatible with previous declaration
+    #@cython.final
+    #cdef bint _put_code_section(self, writer, code_type: str) except -1
+
+
+cdef class FunctionState:
+    cdef public set names_taken
+    cdef public object owner
+    cdef public object scope
+
+    cdef public object error_label
+    cdef public size_t label_counter
+    cdef public set labels_used
+    cdef public object return_label
+    cdef public object continue_label
+    cdef public object break_label
+    cdef public list yield_labels
+
+    cdef public object return_from_error_cleanup_label # not used in __init__ ?
+
+    cdef public object exc_vars
+    cdef public object current_except
+    cdef public bint can_trace
+    cdef public bint gil_owned
+
+    cdef public list temps_allocated
+    cdef public dict temps_free
+    cdef public dict temps_used_type
+    cdef public set zombie_temps
+    cdef public size_t temp_counter
+    cdef public list collect_temps_stack
+
+    cdef public object closure_temps
+    cdef public bint should_declare_error_indicator
+    cdef public bint uses_error_indicator
+    cdef public bint error_without_exception
+
+    cdef public bint needs_refnanny
+
+    cpdef new_label(self, name=*)
+    cpdef tuple get_loop_labels(self)
+    cpdef set_loop_labels(self, labels)
+    cpdef tuple get_all_labels(self)
+    cpdef set_all_labels(self, labels)
+    cpdef start_collecting_temps(self)
+    cpdef stop_collecting_temps(self)
+
+    cpdef list temps_in_use(self)
+
+cdef class IntConst:
+    cdef public object cname
+    cdef public object value
+    cdef public bint is_long
+
+cdef class PyObjectConst:
+    cdef public object cname
+    cdef public object type
+
+cdef class StringConst:
+    cdef public object cname
+    cdef public object text
+    cdef public object escaped_value
+    cdef public dict py_strings
+    cdef public list py_versions
+
+    cpdef get_py_string_const(self, encoding, identifier=*)
+
+## cdef class PyStringConst:
+##     cdef public object cname
+##     cdef public object encoding
+##     cdef public bint is_str
+##     cdef public bint is_unicode
+##     cdef public bint intern
+
+#class GlobalState(object):
+
+#def funccontext_property(name):
+
+cdef class CCodeWriter(object):
+    cdef readonly StringIOTree buffer
+    cdef readonly list pyclass_stack
+    cdef readonly object globalstate
+    cdef readonly object funcstate
+    cdef object code_config
+    cdef tuple last_pos
+    cdef tuple last_marked_pos
+    cdef Py_ssize_t level
+    cdef public Py_ssize_t call_level  # debug-only, see Nodes.py
+    cdef bint bol
+
+    cpdef write(self, s)
+    @cython.final
+    cdef _write_lines(self, s)
+    cpdef _write_to_buffer(self, s)
+    cpdef put(self, code)
+    cpdef put_safe(self, code)
+    cpdef putln(self, code=*, bint safe=*)
+    @cython.final
+    cdef emit_marker(self)
+    @cython.final
+    cdef _build_marker(self, tuple pos)
+    @cython.final
+    cdef increase_indent(self)
+    @cython.final
+    cdef decrease_indent(self)
+    @cython.final
+    cdef indent(self)
+
+
+cdef class PyrexCodeWriter:
+    cdef public object f
+    cdef public Py_ssize_t level
+
+
+cdef class PyxCodeWriter:
+    cdef public StringIOTree buffer
+    cdef public object context
+    cdef object encoding
+    cdef Py_ssize_t level
+    cdef Py_ssize_t original_level
+    cdef dict _insertion_points

venv/lib/python3.10/site-packages/Cython/Compiler/CodeGeneration.py

@@ -0,0 +1,33 @@
+from .Visitor import VisitorTransform
+from .Nodes import StatListNode
+
+
+class ExtractPxdCode(VisitorTransform):
+    """
+    Finds nodes in a pxd file that should generate code, and
+    returns them in a StatListNode.
+
+    The result is a tuple (StatListNode, ModuleScope), i.e.
+    everything that is needed from the pxd after it is processed.
+
+    A purer approach would be to separately compile the pxd code,
+    but the result would have to be slightly more sophisticated
+    than pure strings (functions + wanted interned strings +
+    wanted utility code + wanted cached objects) so for now this
+    approach is taken.
+    """
+
+    def __call__(self, root):
+        self.funcs = []
+        self.visitchildren(root)
+        return (StatListNode(root.pos, stats=self.funcs), root.scope)
+
+    def visit_FuncDefNode(self, node):
+        self.funcs.append(node)
+        # Do not visit children, nested funcdefnodes will
+        # also be moved by this action...
+        return node
+
+    def visit_Node(self, node):
+        self.visitchildren(node)
+        return node

venv/lib/python3.10/site-packages/Cython/Compiler/CythonScope.py

@@ -0,0 +1,187 @@
+from .Symtab import ModuleScope
+from .PyrexTypes import *
+from .UtilityCode import CythonUtilityCode
+from .Errors import error
+from .Scanning import StringSourceDescriptor
+from . import MemoryView
+from .StringEncoding import EncodedString
+
+
+class CythonScope(ModuleScope):
+    is_cython_builtin = 1
+    _cythonscope_initialized = False
+
+    def __init__(self, context):
+        ModuleScope.__init__(self, 'cython', None, None)
+        self.pxd_file_loaded = True
+        self.populate_cython_scope()
+        # The Main.Context object
+        self._context = context
+
+        for fused_type in (cy_integral_type, cy_floating_type, cy_numeric_type):
+            entry = self.declare_typedef(fused_type.name,
+                                         fused_type,
+                                         None,
+                                         cname='<error>')
+            entry.in_cinclude = True
+
+        entry = self.declare_type(
+            "pymutex", cy_pymutex_type, None,
+            cname="__Pyx_Locks_PyMutex")
+        entry = self.declare_type(
+            "pythread_type_lock", cy_pythread_type_lock_type, None,
+            cname="__Pyx_Locks_PyThreadTypeLock")
+
+    def is_cpp(self):
+        # Allow C++ utility code in C++ contexts.
+        return self.context.cpp
+
+    def lookup_type(self, name):
+        # This function should go away when types are all first-level objects.
+        type = parse_basic_type(name)
+        if type:
+            return type
+
+        return super().lookup_type(name)
+
+    def lookup(self, name):
+        entry = super().lookup(name)
+
+        if entry is None and not self._cythonscope_initialized:
+            self.load_cythonscope()
+            entry = super().lookup(name)
+
+        return entry
+
+    def find_module(self, module_name, pos):
+        error("cython.%s is not available" % module_name, pos)
+
+    def find_submodule(self, module_name, as_package=False):
+        entry = self.entries.get(module_name, None)
+        if not entry:
+            self.load_cythonscope()
+            entry = self.entries.get(module_name, None)
+
+        if entry and entry.as_module:
+            return entry.as_module
+        else:
+            # TODO: fix find_submodule control flow so that we're not
+            # expected to create a submodule here (to protect CythonScope's
+            # possible immutability). Hack ourselves out of the situation
+            # for now.
+            raise error((StringSourceDescriptor("cython", ""), 0, 0),
+                  "cython.%s is not available" % module_name)
+
+    def lookup_qualified_name(self, qname):
+        # ExprNode.as_cython_attribute generates qnames and we untangle it here...
+        name_path = qname.split('.')
+        scope = self
+        while len(name_path) > 1:
+            scope = scope.lookup_here(name_path[0])
+            if scope:
+                scope = scope.as_module
+            del name_path[0]
+            if scope is None:
+                return None
+        else:
+            return scope.lookup_here(name_path[0])
+
+    def populate_cython_scope(self):
+        # These are used to optimize isinstance in FinalOptimizePhase
+        type_object = self.declare_typedef(
+            'PyTypeObject',
+            base_type = c_void_type,
+            pos = None,
+            cname = 'PyTypeObject')
+        type_object.is_void = True
+        type_object_type = type_object.type
+
+        self.declare_cfunction(
+            'PyObject_TypeCheck',
+            CFuncType(c_bint_type, [CFuncTypeArg("o", py_object_type, None),
+                                    CFuncTypeArg("t", c_ptr_type(type_object_type), None)]),
+            pos = None,
+            defining = 1,
+            cname = 'PyObject_TypeCheck')
+
+    def load_cythonscope(self):
+        """
+        Creates some entries for testing purposes and entries for
+        cython.array() and for cython.view.*.
+        """
+        if self._cythonscope_initialized:
+            return
+
+        self._cythonscope_initialized = True
+        cython_testscope_utility_code.declare_in_scope(
+                                self, cython_scope=self)
+        cython_test_extclass_utility_code.declare_in_scope(
+                                    self, cython_scope=self)
+
+        #
+        # The view sub-scope
+        #
+        self.viewscope = viewscope = ModuleScope('view', self, None)
+        self.declare_module('view', viewscope, None).as_module = viewscope
+        viewscope.is_cython_builtin = True
+        viewscope.pxd_file_loaded = True
+
+        cythonview_testscope_utility_code.declare_in_scope(
+                                            viewscope, cython_scope=self)
+
+        view_utility_scope = MemoryView.get_view_utility_code(
+            self.context.shared_utility_qualified_name
+        ).declare_in_scope(
+            self.viewscope, cython_scope=self, allowlist=MemoryView.view_utility_allowlist)
+
+        # Marks the types as being cython_builtin_type so that they can be
+        # extended from without Cython attempting to import cython.view
+        ext_types = [ entry.type
+                         for entry in view_utility_scope.entries.values()
+                         if entry.type.is_extension_type ]
+        for ext_type in ext_types:
+            ext_type.is_cython_builtin_type = 1
+
+        # self.entries["array"] = view_utility_scope.entries.pop("array")
+
+        # dataclasses scope
+        dc_str = EncodedString('dataclasses')
+        dataclassesscope = ModuleScope(dc_str, self, context=None)
+        self.declare_module(dc_str, dataclassesscope, pos=None).as_module = dataclassesscope
+        dataclassesscope.is_cython_builtin = True
+        dataclassesscope.pxd_file_loaded = True
+        # doesn't actually have any contents
+
+
+def create_cython_scope(context):
+    # One could in fact probably make it a singleton,
+    # but not sure yet whether any code mutates it (which would kill reusing
+    # it across different contexts)
+    return CythonScope(context)
+
+# Load test utilities for the cython scope
+
+def load_testscope_utility(cy_util_name, **kwargs):
+    return CythonUtilityCode.load(cy_util_name, "TestCythonScope.pyx", **kwargs)
+
+
+undecorated_methods_protos = UtilityCode(proto="""
+    /* These methods are undecorated and have therefore no prototype */
+    static PyObject *__pyx_TestClass_cdef_method(
+            struct __pyx_TestClass_obj *self, int value);
+    static PyObject *__pyx_TestClass_cpdef_method(
+            struct __pyx_TestClass_obj *self, int value, int skip_dispatch);
+    static PyObject *__pyx_TestClass_def_method(
+            PyObject *self, PyObject *value);
+""")
+
+cython_testscope_utility_code = load_testscope_utility("TestScope")
+
+test_cython_utility_dep = load_testscope_utility("TestDep")
+
+cython_test_extclass_utility_code = \
+    load_testscope_utility("TestClass", name="TestClass",
+                           requires=[undecorated_methods_protos,
+                                     test_cython_utility_dep])
+
+cythonview_testscope_utility_code = load_testscope_utility("View.TestScope")

venv/lib/python3.10/site-packages/Cython/Compiler/Dataclass.py

@@ -0,0 +1,868 @@
+# functions to transform a c class into a dataclass
+
+from collections import OrderedDict
+from textwrap import dedent
+import operator
+
+from . import ExprNodes
+from . import Nodes
+from . import PyrexTypes
+from . import Builtin
+from . import Naming
+from .Errors import error, warning
+from .Code import UtilityCode, TempitaUtilityCode, PyxCodeWriter
+from .Visitor import VisitorTransform
+from .StringEncoding import EncodedString
+from .TreeFragment import TreeFragment
+from .ParseTreeTransforms import NormalizeTree, SkipDeclarations
+from .Options import copy_inherited_directives
+
+_dataclass_loader_utilitycode = None
+
+def make_dataclasses_module_callnode(pos):
+    global _dataclass_loader_utilitycode
+    if not _dataclass_loader_utilitycode:
+        python_utility_code = UtilityCode.load_cached("Dataclasses_fallback", "Dataclasses.py")
+        python_utility_code = EncodedString(python_utility_code.impl)
+        _dataclass_loader_utilitycode = TempitaUtilityCode.load(
+            "SpecificModuleLoader", "Dataclasses.c",
+            context={'cname': "dataclasses", 'py_code': python_utility_code.as_c_string_literal()})
+    return ExprNodes.PythonCapiCallNode(
+        pos, "__Pyx_Load_dataclasses_Module",
+        PyrexTypes.CFuncType(PyrexTypes.py_object_type, []),
+        utility_code=_dataclass_loader_utilitycode,
+        args=[],
+    )
+
+def make_dataclass_call_helper(pos, callable, kwds):
+    utility_code = UtilityCode.load_cached("DataclassesCallHelper", "Dataclasses.c")
+    func_type = PyrexTypes.CFuncType(
+        PyrexTypes.py_object_type, [
+            PyrexTypes.CFuncTypeArg("callable", PyrexTypes.py_object_type, None),
+            PyrexTypes.CFuncTypeArg("kwds", PyrexTypes.py_object_type, None)
+        ],
+    )
+    return ExprNodes.PythonCapiCallNode(
+        pos,
+        function_name="__Pyx_DataclassesCallHelper",
+        func_type=func_type,
+        utility_code=utility_code,
+        args=[callable, kwds],
+    )
+
+
+class RemoveAssignmentsToNames(VisitorTransform, SkipDeclarations):
+    """
+    Cython (and Python) normally treats
+
+    class A:
+         x = 1
+
+    as generating a class attribute. However for dataclasses the `= 1` should be interpreted as
+    a default value to initialize an instance attribute with.
+    This transform therefore removes the `x=1` assignment so that the class attribute isn't
+    generated, while recording what it has removed so that it can be used in the initialization.
+    """
+    def __init__(self, names):
+        super().__init__()
+        self.names = names
+        self.removed_assignments = {}
+
+    def visit_CClassNode(self, node):
+        self.visitchildren(node)
+        return node
+
+    def visit_PyClassNode(self, node):
+        return node  # go no further
+
+    def visit_FuncDefNode(self, node):
+        return node  # go no further
+
+    def visit_SingleAssignmentNode(self, node):
+        if node.lhs.is_name and node.lhs.name in self.names:
+            if node.lhs.name in self.removed_assignments:
+                warning(node.pos, ("Multiple assignments for '%s' in dataclass; "
+                                   "using most recent") % node.lhs.name, 1)
+            self.removed_assignments[node.lhs.name] = node.rhs
+            return []
+        return node
+
+    # I believe cascaded assignment is always a syntax error with annotations
+    # so there's no need to define visit_CascadedAssignmentNode
+
+    def visit_Node(self, node):
+        self.visitchildren(node)
+        return node
+
+
+class TemplateCode:
+    """
+    Adds the ability to keep track of placeholder argument names to PyxCodeWriter.
+
+    Also adds extra_stats which are nodes bundled at the end when this
+    is converted to a tree.
+    """
+    _placeholder_count = 0
+
+    def __init__(self, writer=None, placeholders=None, extra_stats=None):
+        self.writer = PyxCodeWriter() if writer is None else writer
+        self.placeholders = {} if placeholders is None else placeholders
+        self.extra_stats = [] if extra_stats is None else extra_stats
+
+    def add_code_line(self, code_line):
+        self.writer.putln(code_line)
+
+    def add_code_chunk(self, code_chunk):
+        self.writer.put_chunk(code_chunk)
+
+    def reset(self):
+        # don't attempt to reset placeholders - it really doesn't matter if
+        # we have unused placeholders
+        self.writer.reset()
+
+    def empty(self):
+        return self.writer.empty()
+
+    def indent(self):
+        self.writer.indent()
+
+    def dedent(self):
+        self.writer.dedent()
+
+    def indenter(self, block_opener_line):
+        return self.writer.indenter(block_opener_line)
+
+    def new_placeholder(self, field_names, value):
+        name = self._new_placeholder_name(field_names)
+        self.placeholders[name] = value
+        return name
+
+    def add_extra_statements(self, statements):
+        if self.extra_stats is None:
+            assert False, "Can only use add_extra_statements on top-level writer"
+        self.extra_stats.extend(statements)
+
+    def _new_placeholder_name(self, field_names):
+        while True:
+            name = f"DATACLASS_PLACEHOLDER_{self._placeholder_count:d}"
+            if (name not in self.placeholders
+                    and name not in field_names):
+                # make sure name isn't already used and doesn't
+                # conflict with a variable name (which is unlikely but possible)
+                break
+            self._placeholder_count += 1
+        return name
+
+    def generate_tree(self, level='c_class'):
+        stat_list_node = TreeFragment(
+            self.writer.getvalue(),
+            level=level,
+            pipeline=[NormalizeTree(None)],
+        ).substitute(self.placeholders)
+
+        stat_list_node.stats += self.extra_stats
+        return stat_list_node
+
+    def insertion_point(self):
+        new_writer = self.writer.insertion_point()
+        return TemplateCode(
+            writer=new_writer,
+            placeholders=self.placeholders,
+            extra_stats=self.extra_stats
+        )
+
+
+class _MISSING_TYPE:
+    pass
+MISSING = _MISSING_TYPE()
+
+
+class Field:
+    """
+    Field is based on the dataclasses.field class from the standard library module.
+    It is used internally during the generation of Cython dataclasses to keep track
+    of the settings for individual attributes.
+
+    Attributes of this class are stored as nodes so they can be used in code construction
+    more readily (i.e. we store BoolNode rather than bool)
+    """
+    default = MISSING
+    default_factory = MISSING
+    private = False
+
+    literal_keys = ("repr", "hash", "init", "compare", "metadata")
+
+    # default values are defined by the CPython dataclasses.field
+    def __init__(self, pos, default=MISSING, default_factory=MISSING,
+                 repr=None, hash=None, init=None,
+                 compare=None, metadata=None,
+                 is_initvar=False, is_classvar=False,
+                 **additional_kwds):
+        if default is not MISSING:
+            self.default = default
+        if default_factory is not MISSING:
+            self.default_factory = default_factory
+        self.repr = repr or ExprNodes.BoolNode(pos, value=True)
+        self.hash = hash or ExprNodes.NoneNode(pos)
+        self.init = init or ExprNodes.BoolNode(pos, value=True)
+        self.compare = compare or ExprNodes.BoolNode(pos, value=True)
+        self.metadata = metadata or ExprNodes.NoneNode(pos)
+        self.is_initvar = is_initvar
+        self.is_classvar = is_classvar
+
+        for k, v in additional_kwds.items():
+            # There should not be any additional keywords!
+            error(v.pos, "cython.dataclasses.field() got an unexpected keyword argument '%s'" % k)
+
+        for field_name in self.literal_keys:
+            field_value = getattr(self, field_name)
+            if not field_value.is_literal:
+                error(field_value.pos,
+                      "cython.dataclasses.field parameter '%s' must be a literal value" % field_name)
+
+    def iterate_record_node_arguments(self):
+        for key in (self.literal_keys + ('default', 'default_factory')):
+            value = getattr(self, key)
+            if value is not MISSING:
+                yield key, value
+
+
+def process_class_get_fields(node):
+    var_entries = node.scope.var_entries
+    # order of definition is used in the dataclass
+    var_entries = sorted(var_entries, key=operator.attrgetter('pos'))
+    var_names = [entry.name for entry in var_entries]
+
+    # don't treat `x = 1` as an assignment of a class attribute within the dataclass
+    transform = RemoveAssignmentsToNames(var_names)
+    transform(node)
+    default_value_assignments = transform.removed_assignments
+
+    base_type = node.base_type
+    fields = OrderedDict()
+    while base_type:
+        if base_type.is_external or not base_type.scope.implemented:
+            warning(node.pos, "Cannot reliably handle Cython dataclasses with base types "
+                "in external modules since it is not possible to tell what fields they have", 2)
+        if base_type.dataclass_fields:
+            fields = base_type.dataclass_fields.copy()
+            break
+        base_type = base_type.base_type
+
+    for entry in var_entries:
+        name = entry.name
+        is_initvar = entry.declared_with_pytyping_modifier("dataclasses.InitVar")
+        # TODO - classvars aren't included in "var_entries" so are missed here
+        # and thus this code is never triggered
+        is_classvar = entry.declared_with_pytyping_modifier("typing.ClassVar")
+        if name in default_value_assignments:
+            assignment = default_value_assignments[name]
+            if (isinstance(assignment, ExprNodes.CallNode) and (
+                    assignment.function.as_cython_attribute() == "dataclasses.field" or
+                    Builtin.exprnode_to_known_standard_library_name(
+                        assignment.function, node.scope) == "dataclasses.field")):
+                # I believe most of this is well-enforced when it's treated as a directive
+                # but it doesn't hurt to make sure
+                valid_general_call = (isinstance(assignment, ExprNodes.GeneralCallNode)
+                        and isinstance(assignment.positional_args, ExprNodes.TupleNode)
+                        and not assignment.positional_args.args
+                        and (assignment.keyword_args is None or isinstance(assignment.keyword_args, ExprNodes.DictNode)))
+                valid_simple_call = (isinstance(assignment, ExprNodes.SimpleCallNode) and not assignment.args)
+                if not (valid_general_call or valid_simple_call):
+                    error(assignment.pos, "Call to 'cython.dataclasses.field' must only consist "
+                          "of compile-time keyword arguments")
+                    continue
+                keyword_args = assignment.keyword_args.as_python_dict() if valid_general_call and assignment.keyword_args else {}
+                if 'default' in keyword_args and 'default_factory' in keyword_args:
+                    error(assignment.pos, "cannot specify both default and default_factory")
+                    continue
+                field = Field(node.pos, **keyword_args)
+            else:
+                if assignment.type in [Builtin.list_type, Builtin.dict_type, Builtin.set_type]:
+                    # The standard library module generates a TypeError at runtime
+                    # in this situation.
+                    # Error message is copied from CPython
+                    error(assignment.pos, "mutable default <class '{}'> for field {} is not allowed: "
+                          "use default_factory".format(assignment.type.name, name))
+
+                field = Field(node.pos, default=assignment)
+        else:
+            field = Field(node.pos)
+        field.is_initvar = is_initvar
+        field.is_classvar = is_classvar
+        if entry.visibility == "private":
+            field.private = True
+        fields[name] = field
+    node.entry.type.dataclass_fields = fields
+    return fields
+
+
+def handle_cclass_dataclass(node, dataclass_args, analyse_decs_transform):
+    # default argument values from https://docs.python.org/3/library/dataclasses.html
+    kwargs = dict(init=True, repr=True, eq=True,
+                  order=False, unsafe_hash=False,
+                  frozen=False, kw_only=False, match_args=True)
+    if dataclass_args is not None:
+        if dataclass_args[0]:
+            error(node.pos, "cython.dataclasses.dataclass takes no positional arguments")
+        for k, v in dataclass_args[1].items():
+            if k not in kwargs:
+                error(node.pos,
+                      "cython.dataclasses.dataclass() got an unexpected keyword argument '%s'" % k)
+            if not isinstance(v, ExprNodes.BoolNode):
+                error(node.pos,
+                      "Arguments passed to cython.dataclasses.dataclass must be True or False")
+            kwargs[k] = v.value
+
+    kw_only = kwargs['kw_only']
+
+    fields = process_class_get_fields(node)
+
+    dataclass_module = make_dataclasses_module_callnode(node.pos)
+
+    # create __dataclass_params__ attribute. I try to use the exact
+    # `_DataclassParams` class defined in the standard library module if at all possible
+    # for maximum duck-typing compatibility.
+    dataclass_params_func = ExprNodes.AttributeNode(node.pos, obj=dataclass_module,
+                                                    attribute=EncodedString("_DataclassParams"))
+    dataclass_params_keywords = ExprNodes.DictNode.from_pairs(
+        node.pos,
+        [ (ExprNodes.IdentifierStringNode(node.pos, value=EncodedString(k)),
+           ExprNodes.BoolNode(node.pos, value=v))
+          for k, v in kwargs.items() ] +
+        [ (ExprNodes.IdentifierStringNode(node.pos, value=EncodedString(k)),
+           ExprNodes.BoolNode(node.pos, value=v))
+          for k, v in [('kw_only', kw_only),
+                       ('slots', False), ('weakref_slot', False)]
+        ])
+    dataclass_params = make_dataclass_call_helper(
+        node.pos, dataclass_params_func, dataclass_params_keywords)
+    dataclass_params_assignment = Nodes.SingleAssignmentNode(
+        node.pos,
+        lhs = ExprNodes.NameNode(node.pos, name=EncodedString("__dataclass_params__")),
+        rhs = dataclass_params)
+
+    dataclass_fields_stats = _set_up_dataclass_fields(node, fields, dataclass_module)
+
+    stats = Nodes.StatListNode(node.pos,
+                               stats=[dataclass_params_assignment] + dataclass_fields_stats)
+
+    code = TemplateCode()
+    generate_init_code(code, kwargs['init'], node, fields, kw_only)
+    generate_match_args(code, kwargs['match_args'], node, fields, kw_only)
+    generate_repr_code(code, kwargs['repr'], node, fields)
+    generate_eq_code(code, kwargs['eq'], node, fields)
+    generate_order_code(code, kwargs['order'], node, fields)
+    generate_hash_code(code, kwargs['unsafe_hash'], kwargs['eq'], kwargs['frozen'], node, fields)
+
+    stats.stats += code.generate_tree().stats
+
+    # turn off annotation typing, so all arguments to __init__ are accepted as
+    # generic objects and thus can accept _HAS_DEFAULT_FACTORY.
+    # Type conversion comes later
+    comp_directives = Nodes.CompilerDirectivesNode(node.pos,
+        directives=copy_inherited_directives(node.scope.directives, annotation_typing=False),
+        body=stats)
+
+    comp_directives.analyse_declarations(node.scope)
+    # probably already in this scope, but it doesn't hurt to make sure
+    analyse_decs_transform.enter_scope(node, node.scope)
+    analyse_decs_transform.visit(comp_directives)
+    analyse_decs_transform.exit_scope()
+
+    node.body.stats.append(comp_directives)
+
+
+def generate_init_code(code, init, node, fields, kw_only):
+    """
+    Notes on CPython generated "__init__":
+    * Implemented in `_init_fn`.
+    * The use of the `dataclasses._HAS_DEFAULT_FACTORY` sentinel value as
+      the default argument for fields that need constructing with a factory
+      function is copied from the CPython implementation. (`None` isn't
+      suitable because it could also be a value for the user to pass.)
+      There's no real reason why it needs importing from the dataclasses module
+      though - it could equally be a value generated by Cython when the module loads.
+    * seen_default and the associated error message are copied directly from Python
+    * Call to user-defined __post_init__ function (if it exists) is copied from
+      CPython.
+
+    Cython behaviour deviates a little here (to be decided if this is right...)
+    Because the class variable from the assignment does not exist Cython fields will
+    return None (or whatever their type default is) if not initialized while Python
+    dataclasses will fall back to looking up the class variable.
+    """
+    if not init or node.scope.lookup_here("__init__"):
+        return
+
+    # selfname behaviour copied from the cpython module
+    selfname = "__dataclass_self__" if "self" in fields else "self"
+    args = [selfname]
+
+    if kw_only:
+        args.append("*")
+
+    function_start_point = code.insertion_point()
+    code = code.insertion_point()
+    code.indent()
+
+    # create a temp to get _HAS_DEFAULT_FACTORY
+    dataclass_module = make_dataclasses_module_callnode(node.pos)
+    has_default_factory = ExprNodes.AttributeNode(
+        node.pos,
+        obj=dataclass_module,
+        attribute=EncodedString("_HAS_DEFAULT_FACTORY")
+    )
+
+    default_factory_placeholder = code.new_placeholder(fields, has_default_factory)
+
+    seen_default = False
+    for name, field in fields.items():
+        entry = node.scope.lookup(name)
+        if entry.annotation:
+            annotation = f": {entry.annotation.string.value}"
+        else:
+            annotation = ""
+        assignment = ''
+        if field.default is not MISSING or field.default_factory is not MISSING:
+            if field.init.value:
+                seen_default = True
+            if field.default_factory is not MISSING:
+                ph_name = default_factory_placeholder
+            else:
+                ph_name = code.new_placeholder(fields, field.default)  # 'default' should be a node
+            assignment = f" = {ph_name}"
+        elif seen_default and not kw_only and field.init.value:
+            error(entry.pos, ("non-default argument '%s' follows default argument "
+                              "in dataclass __init__") % name)
+            code.reset()
+            return
+
+        if field.init.value:
+            args.append(f"{name}{annotation}{assignment}")
+
+        if field.is_initvar:
+            continue
+        elif field.default_factory is MISSING:
+            if field.init.value:
+                code.add_code_line(f"{selfname}.{name} = {name}")
+            elif assignment:
+                # not an argument to the function, but is still initialized
+                code.add_code_line(f"{selfname}.{name}{assignment}")
+        else:
+            ph_name = code.new_placeholder(fields, field.default_factory)
+            if field.init.value:
+                # close to:
+                # def __init__(self, name=_PLACEHOLDER_VALUE):
+                #     self.name = name_default_factory() if name is _PLACEHOLDER_VALUE else name
+                code.add_code_line(
+                    f"{selfname}.{name} = {ph_name}() if {name} is {default_factory_placeholder} else {name}"
+                )
+            else:
+                # still need to use the default factory to initialize
+                code.add_code_line(f"{selfname}.{name} = {ph_name}()")
+
+    if node.scope.lookup("__post_init__"):
+        post_init_vars = ", ".join(name for name, field in fields.items()
+                                   if field.is_initvar)
+        code.add_code_line(f"{selfname}.__post_init__({post_init_vars})")
+
+    if code.empty():
+        code.add_code_line("pass")
+
+    args = ", ".join(args)
+    function_start_point.add_code_line(f"def __init__({args}):")
+
+
+def generate_match_args(code, match_args, node, fields, global_kw_only):
+    """
+    Generates a tuple containing what would be the positional args to __init__
+
+    Note that this is generated even if the user overrides init
+    """
+    if not match_args or node.scope.lookup_here("__match_args__"):
+        return
+    positional_arg_names = []
+    for field_name, field in fields.items():
+        # TODO hasattr and global_kw_only can be removed once full kw_only support is added
+        field_is_kw_only = global_kw_only or (
+            hasattr(field, 'kw_only') and field.kw_only.value
+        )
+        if not field_is_kw_only:
+            positional_arg_names.append(field_name)
+    code.add_code_line("__match_args__ = %s" % str(tuple(positional_arg_names)))
+
+
+def generate_repr_code(code, repr, node, fields):
+    """
+    The core of the CPython implementation is just:
+    ['return self.__class__.__qualname__ + f"(' +
+                     ', '.join([f"{f.name}={{self.{f.name}!r}}"
+                                for f in fields]) +
+                     ')"'],
+
+    The only notable difference here is self.__class__.__qualname__ -> type(self).__name__
+    which is because Cython currently supports Python 2.
+
+    However, it also has some guards for recursive repr invocations. In the standard
+    library implementation they're done with a wrapper decorator that captures a set
+    (with the set keyed by id and thread). Here we create a set as a thread local
+    variable and key only by id.
+    """
+    if not repr or node.scope.lookup("__repr__"):
+        return
+
+    # The recursive guard is likely a little costly, so skip it if possible.
+    # is_gc_simple defines where it can contain recursive objects
+    needs_recursive_guard = False
+    for name in fields.keys():
+        entry = node.scope.lookup(name)
+        type_ = entry.type
+        if type_.is_memoryviewslice:
+            type_ = type_.dtype
+        if not type_.is_pyobject:
+            continue  # no GC
+        if not type_.is_gc_simple:
+            needs_recursive_guard = True
+            break
+
+    if needs_recursive_guard:
+        code.add_code_chunk("""
+            __pyx_recursive_repr_guard = __import__('threading').local()
+            __pyx_recursive_repr_guard.running = set()
+        """)
+
+    with code.indenter("def __repr__(self):"):
+        if needs_recursive_guard:
+            code.add_code_chunk("""
+                key = id(self)
+                guard_set = self.__pyx_recursive_repr_guard.running
+                if key in guard_set: return '...'
+                guard_set.add(key)
+                try:
+            """)
+            code.indent()
+
+        strs = ["%s={self.%s!r}" % (name, name)
+                for name, field in fields.items()
+                if field.repr.value and not field.is_initvar]
+        format_string = ", ".join(strs)
+
+        code.add_code_chunk(f'''
+            name = getattr(type(self), "__qualname__", None) or type(self).__name__
+            return f'{{name}}({format_string})'
+        ''')
+        if needs_recursive_guard:
+            code.dedent()
+            with code.indenter("finally:"):
+                code.add_code_line("guard_set.remove(key)")
+
+
+def generate_cmp_code(code, op, funcname, node, fields):
+    if node.scope.lookup_here(funcname):
+        return
+
+    names = [name for name, field in fields.items() if (field.compare.value and not field.is_initvar)]
+
+    with code.indenter(f"def {funcname}(self, other):"):
+        code.add_code_chunk(f"""
+            if other.__class__ is not self.__class__: return NotImplemented
+
+            cdef {node.class_name} other_cast
+            other_cast = <{node.class_name}>other
+        """)
+
+        # The Python implementation of dataclasses.py does a tuple comparison
+        # (roughly):
+        #  return self._attributes_to_tuple() {op} other._attributes_to_tuple()
+        #
+        # For the Cython implementation a tuple comparison isn't an option because
+        # not all attributes can be converted to Python objects and stored in a tuple
+        #
+        # TODO - better diagnostics of whether the types support comparison before
+        #    generating the code. Plus, do we want to convert C structs to dicts and
+        #    compare them that way (I think not, but it might be in demand)?
+        checks = []
+        op_without_equals = op.replace('=', '')
+
+        for name in names:
+            if op != '==':
+                # tuple comparison rules - early elements take precedence
+                code.add_code_line(f"if self.{name} {op_without_equals} other_cast.{name}: return True")
+            code.add_code_line(f"if self.{name} != other_cast.{name}: return False")
+        code.add_code_line(f"return {'True' if '=' in op else 'False'}")  # "() == ()" is True
+
+
+def generate_eq_code(code, eq, node, fields):
+    if not eq:
+        return
+    generate_cmp_code(code, "==", "__eq__", node, fields)
+
+
+def generate_order_code(code, order, node, fields):
+    if not order:
+        return
+
+    for op, name in [("<", "__lt__"),
+                     ("<=", "__le__"),
+                     (">", "__gt__"),
+                     (">=", "__ge__")]:
+        generate_cmp_code(code, op, name, node, fields)
+
+
+def generate_hash_code(code, unsafe_hash, eq, frozen, node, fields):
+    """
+    Copied from CPython implementation - the intention is to follow this as far as
+    is possible:
+    #    +------------------- unsafe_hash= parameter
+    #    |       +----------- eq= parameter
+    #    |       |       +--- frozen= parameter
+    #    |       |       |
+    #    v       v       v    |        |        |
+    #                         |   no   |  yes   |  <--- class has explicitly defined __hash__
+    # +=======+=======+=======+========+========+
+    # | False | False | False |        |        | No __eq__, use the base class __hash__
+    # +-------+-------+-------+--------+--------+
+    # | False | False | True  |        |        | No __eq__, use the base class __hash__
+    # +-------+-------+-------+--------+--------+
+    # | False | True  | False | None   |        | <-- the default, not hashable
+    # +-------+-------+-------+--------+--------+
+    # | False | True  | True  | add    |        | Frozen, so hashable, allows override
+    # +-------+-------+-------+--------+--------+
+    # | True  | False | False | add    | raise  | Has no __eq__, but hashable
+    # +-------+-------+-------+--------+--------+
+    # | True  | False | True  | add    | raise  | Has no __eq__, but hashable
+    # +-------+-------+-------+--------+--------+
+    # | True  | True  | False | add    | raise  | Not frozen, but hashable
+    # +-------+-------+-------+--------+--------+
+    # | True  | True  | True  | add    | raise  | Frozen, so hashable
+    # +=======+=======+=======+========+========+
+    # For boxes that are blank, __hash__ is untouched and therefore
+    # inherited from the base class.  If the base is object, then
+    # id-based hashing is used.
+
+    The Python implementation creates a tuple of all the fields, then hashes them.
+    This implementation creates a tuple of all the hashes of all the fields and hashes that.
+    The reason for this slight difference is to avoid to-Python conversions for anything
+    that Cython knows how to hash directly (It doesn't look like this currently applies to
+    anything though...).
+    """
+
+    hash_entry = node.scope.lookup_here("__hash__")
+    if hash_entry:
+        # TODO ideally assignment of __hash__ to None shouldn't trigger this
+        # but difficult to get the right information here
+        if unsafe_hash:
+            # error message taken from CPython dataclasses module
+            error(node.pos, "Cannot overwrite attribute __hash__ in class %s" % node.class_name)
+        return
+
+    if not unsafe_hash:
+        if not eq:
+            return
+        if not frozen:
+            code.add_extra_statements([
+                Nodes.SingleAssignmentNode(
+                    node.pos,
+                    lhs=ExprNodes.NameNode(node.pos, name=EncodedString("__hash__")),
+                    rhs=ExprNodes.NoneNode(node.pos),
+                )
+            ])
+            return
+
+    names = [
+        name for name, field in fields.items()
+        if not field.is_initvar and (
+            field.compare.value if field.hash.value is None else field.hash.value)
+    ]
+
+    # make a tuple of the hashes
+    hash_tuple_items = ", ".join("self.%s" % name for name in names)
+    if hash_tuple_items:
+        hash_tuple_items += ","  # ensure that one arg form is a tuple
+
+    # if we're here we want to generate a hash
+    with code.indenter("def __hash__(self):"):
+        code.add_code_line(f"return hash(({hash_tuple_items}))")
+
+
+def get_field_type(pos, entry):
+    """
+    sets the .type attribute for a field
+
+    Returns the annotation if possible (since this is what the dataclasses
+    module does). If not (for example, attributes defined with cdef) then
+    it creates a string fallback.
+    """
+    if entry.annotation:
+        # Right now it doesn't look like cdef classes generate an
+        # __annotations__ dict, therefore it's safe to just return
+        # entry.annotation
+        # (TODO: remove .string if we ditch PEP563)
+        return entry.annotation.string
+        # If they do in future then we may need to look up into that
+        # to duplicating the node. The code below should do this:
+        #class_name_node = ExprNodes.NameNode(pos, name=entry.scope.name)
+        #annotations = ExprNodes.AttributeNode(
+        #    pos, obj=class_name_node,
+        #    attribute=EncodedString("__annotations__")
+        #)
+        #return ExprNodes.IndexNode(
+        #    pos, base=annotations,
+        #    index=ExprNodes.UnicodeNode(pos, value=entry.name)
+        #)
+    else:
+        # it's slightly unclear what the best option is here - we could
+        # try to return PyType_Type. This case should only happen with
+        # attributes defined with cdef so Cython is free to make it's own
+        # decision
+        s = EncodedString(entry.type.declaration_code("", for_display=1))
+        return ExprNodes.UnicodeNode(pos, value=s)
+
+
+class FieldRecordNode(ExprNodes.ExprNode):
+    """
+    __dataclass_fields__ contains a bunch of field objects recording how each field
+    of the dataclass was initialized (mainly corresponding to the arguments passed to
+    the "field" function). This node is used for the attributes of these field objects.
+
+    If possible, coerces `arg` to a Python object.
+    Otherwise, generates a sensible backup string.
+    """
+    subexprs = ['arg']
+
+    def __init__(self, pos, arg):
+        super().__init__(pos, arg=arg)
+
+    def analyse_types(self, env):
+        self.arg.analyse_types(env)
+        self.type = self.arg.type
+        return self
+
+    def coerce_to_pyobject(self, env):
+        if self.arg.type.can_coerce_to_pyobject(env):
+            return self.arg.coerce_to_pyobject(env)
+        else:
+            # A string representation of the code that gave the field seems like a reasonable
+            # fallback. This'll mostly happen for "default" and "default_factory" where the
+            # type may be a C-type that can't be converted to Python.
+            return self._make_string()
+
+    def _make_string(self):
+        from .AutoDocTransforms import AnnotationWriter
+        writer = AnnotationWriter(description="Dataclass field")
+        string = writer.write(self.arg)
+        return ExprNodes.UnicodeNode(self.pos, value=EncodedString(string))
+
+    def generate_evaluation_code(self, code):
+        return self.arg.generate_evaluation_code(code)
+
+
+def _set_up_dataclass_fields(node, fields, dataclass_module):
+    # For defaults and default_factories containing things like lambda,
+    # they're already declared in the class scope, and it creates a big
+    # problem if multiple copies are floating around in both the __init__
+    # function, and in the __dataclass_fields__ structure.
+    # Therefore, create module-level constants holding these values and
+    # pass those around instead
+    #
+    # If possible we use the `Field` class defined in the standard library
+    # module so that the information stored here is as close to a regular
+    # dataclass as is possible.
+    variables_assignment_stats = []
+    for name, field in fields.items():
+        if field.private:
+            continue  # doesn't appear in the public interface
+        for attrname in [ "default", "default_factory" ]:
+            field_default = getattr(field, attrname)
+            if field_default is MISSING or field_default.is_literal or field_default.is_name:
+                # some simple cases where we don't need to set up
+                # the variable as a module-level constant
+                continue
+            global_scope = node.scope.global_scope()
+            module_field_name = global_scope.mangle(
+                global_scope.mangle(Naming.dataclass_field_default_cname, node.class_name),
+                name)
+            # create an entry in the global scope for this variable to live
+            field_node = ExprNodes.NameNode(field_default.pos, name=EncodedString(module_field_name))
+            field_node.entry = global_scope.declare_var(
+                field_node.name, type=field_default.type or PyrexTypes.unspecified_type,
+                pos=field_default.pos, cname=field_node.name, is_cdef=True,
+                # TODO: do we need to set 'pytyping_modifiers' here?
+            )
+            # replace the field so that future users just receive the namenode
+            setattr(field, attrname, field_node)
+
+            variables_assignment_stats.append(
+                Nodes.SingleAssignmentNode(field_default.pos, lhs=field_node, rhs=field_default))
+
+    placeholders = {}
+    field_func = ExprNodes.AttributeNode(node.pos, obj=dataclass_module,
+                                         attribute=EncodedString("field"))
+    dc_fields = ExprNodes.DictNode(node.pos, key_value_pairs=[])
+    dc_fields_namevalue_assignments = []
+
+    for name, field in fields.items():
+        if field.private:
+            continue  # doesn't appear in the public interface
+        type_placeholder_name = "PLACEHOLDER_%s" % name
+        placeholders[type_placeholder_name] = get_field_type(
+            node.pos, node.scope.entries[name]
+        )
+
+        # defining these make the fields introspect more like a Python dataclass
+        field_type_placeholder_name = "PLACEHOLDER_FIELD_TYPE_%s" % name
+        if field.is_initvar:
+            placeholders[field_type_placeholder_name] = ExprNodes.AttributeNode(
+                node.pos, obj=dataclass_module,
+                attribute=EncodedString("_FIELD_INITVAR")
+            )
+        elif field.is_classvar:
+            # TODO - currently this isn't triggered
+            placeholders[field_type_placeholder_name] = ExprNodes.AttributeNode(
+                node.pos, obj=dataclass_module,
+                attribute=EncodedString("_FIELD_CLASSVAR")
+            )
+        else:
+            placeholders[field_type_placeholder_name] = ExprNodes.AttributeNode(
+                node.pos, obj=dataclass_module,
+                attribute=EncodedString("_FIELD")
+            )
+
+        dc_field_keywords = ExprNodes.DictNode.from_pairs(
+            node.pos,
+            [(ExprNodes.IdentifierStringNode(node.pos, value=EncodedString(k)),
+               FieldRecordNode(node.pos, arg=v))
+              for k, v in field.iterate_record_node_arguments()]
+
+        )
+        dc_field_call = make_dataclass_call_helper(
+            node.pos, field_func, dc_field_keywords
+        )
+        dc_fields.key_value_pairs.append(
+            ExprNodes.DictItemNode(
+                node.pos,
+                key=ExprNodes.IdentifierStringNode(node.pos, value=EncodedString(name)),
+                value=dc_field_call))
+        dc_fields_namevalue_assignments.append(
+            dedent(f"""\
+                __dataclass_fields__[{name!r}].name = {name!r}
+                __dataclass_fields__[{name!r}].type = {type_placeholder_name}
+                __dataclass_fields__[{name!r}]._field_type = {field_type_placeholder_name}
+            """))
+
+    dataclass_fields_assignment = \
+        Nodes.SingleAssignmentNode(node.pos,
+                        lhs = ExprNodes.NameNode(node.pos,
+                                        name=EncodedString("__dataclass_fields__")),
+                        rhs = dc_fields)
+
+    dc_fields_namevalue_assignments = "\n".join(dc_fields_namevalue_assignments)
+    dc_fields_namevalue_assignments = TreeFragment(dc_fields_namevalue_assignments,
+                                                   level="c_class",
+                                                   pipeline=[NormalizeTree(None)])
+    dc_fields_namevalue_assignments = dc_fields_namevalue_assignments.substitute(placeholders)
+
+    return (variables_assignment_stats
+            + [dataclass_fields_assignment]
+            + dc_fields_namevalue_assignments.stats)

venv/lib/python3.10/site-packages/Cython/Compiler/DebugFlags.py

@@ -0,0 +1,24 @@
+# Can be enabled at the command line with --debug-xxx.
+
+debug_disposal_code = 0
+debug_temp_alloc = 0
+debug_coercion = 0
+
+# Write comments into the C code that show where temporary variables
+# are allocated and released.
+debug_temp_code_comments = 0
+
+# Write a call trace of the code generation phase into the C code.
+debug_trace_code_generation = 0
+
+# Do not replace exceptions with user-friendly error messages.
+debug_no_exception_intercept = 0
+
+# Print a message each time a new stage in the pipeline is entered.
+debug_verbose_pipeline = 0
+
+# Print a message each time an Entry type is assigned.
+debug_verbose_entry_types = False
+
+# Raise an exception when an error is encountered.
+debug_exception_on_error = 0

venv/lib/python3.10/site-packages/Cython/Compiler/Errors.py

@@ -0,0 +1,295 @@
+#
+#   Errors
+#
+
+any_string_type = (bytes, str)
+
+import sys
+from contextlib import contextmanager
+
+try:
+    from threading import local as _threadlocal
+except ImportError:
+    class _threadlocal: pass
+
+threadlocal = _threadlocal()
+
+from ..Utils import open_new_file
+from . import DebugFlags
+from . import Options
+
+
+class PyrexError(Exception):
+    pass
+
+
+class PyrexWarning(Exception):
+    pass
+
+class CannotSpecialize(PyrexError):
+    pass
+
+def context(position):
+    source = position[0]
+    assert not (isinstance(source, any_string_type)), (
+        "Please replace filename strings with Scanning.FileSourceDescriptor instances %r" % source)
+    try:
+        F = source.get_lines()
+    except UnicodeDecodeError:
+        # file has an encoding problem
+        s = "[unprintable code]\n"
+    else:
+        s = ''.join(F[max(0, position[1]-6):position[1]])
+        s = '...\n%s%s^\n' % (s, ' '*(position[2]))
+    s = '%s\n%s%s\n' % ('-'*60, s, '-'*60)
+    return s
+
+def format_position(position):
+    if position:
+        return "%s:%d:%d: " % (position[0].get_error_description(),
+                                position[1], position[2])
+    return ''
+
+def format_error(message, position):
+    if position:
+        pos_str = format_position(position)
+        cont = context(position)
+        message = '\nError compiling Cython file:\n%s\n%s%s' % (cont, pos_str, message or '')
+    return message
+
+class CompileError(PyrexError):
+
+    def __init__(self, position = None, message = ""):
+        self.position = position
+        self.message_only = message
+        self.formatted_message = format_error(message, position)
+        self.reported = False
+        Exception.__init__(self, self.formatted_message)
+        # Python Exception subclass pickling is broken,
+        # see https://bugs.python.org/issue1692335
+        self.args = (position, message)
+
+    def __str__(self):
+        return self.formatted_message
+
+class CompileWarning(PyrexWarning):
+
+    def __init__(self, position = None, message = ""):
+        self.position = position
+        Exception.__init__(self, format_position(position) + message)
+
+class InternalError(Exception):
+    # If this is ever raised, there is a bug in the compiler.
+
+    def __init__(self, message):
+        self.message_only = message
+        Exception.__init__(self, "Internal compiler error: %s"
+            % message)
+
+class AbortError(Exception):
+    # Throw this to stop the compilation immediately.
+
+    def __init__(self, message):
+        self.message_only = message
+        Exception.__init__(self, "Abort error: %s" % message)
+
+class CompilerCrash(CompileError):
+    # raised when an unexpected exception occurs in a transform
+    def __init__(self, pos, context, message, cause, stacktrace=None):
+        if message:
+            message = '\n' + message
+        else:
+            message = '\n'
+        self.message_only = message
+        if context:
+            message = "Compiler crash in %s%s" % (context, message)
+        if stacktrace:
+            import traceback
+            message += (
+                '\n\nCompiler crash traceback from this point on:\n' +
+                ''.join(traceback.format_tb(stacktrace)))
+        if cause:
+            if not stacktrace:
+                message += '\n'
+            message += '%s: %s' % (cause.__class__.__name__, cause)
+        CompileError.__init__(self, pos, message)
+        # Python Exception subclass pickling is broken,
+        # see https://bugs.python.org/issue1692335
+        self.args = (pos, context, message, cause, stacktrace)
+
+class NoElementTreeInstalledException(PyrexError):
+    """raised when the user enabled options.gdb_debug but no ElementTree
+    implementation was found
+    """
+
+def open_listing_file(path, echo_to_stderr=True):
+    # Begin a new error listing. If path is None, no file
+    # is opened, the error counter is just reset.
+    if path is not None:
+        threadlocal.cython_errors_listing_file = open_new_file(path)
+    else:
+        threadlocal.cython_errors_listing_file = None
+    if echo_to_stderr:
+        threadlocal.cython_errors_echo_file = sys.stderr
+    else:
+        threadlocal.cython_errors_echo_file = None
+    threadlocal.cython_errors_count = 0
+
+def close_listing_file():
+    if threadlocal.cython_errors_listing_file:
+        threadlocal.cython_errors_listing_file.close()
+        threadlocal.cython_errors_listing_file = None
+
+def report_error(err, use_stack=True):
+    error_stack = threadlocal.cython_errors_stack
+    if error_stack and use_stack:
+        error_stack[-1].append(err)
+    else:
+        # See Main.py for why dual reporting occurs. Quick fix for now.
+        if err.reported: return
+        err.reported = True
+        try: line = "%s\n" % err
+        except UnicodeEncodeError:
+            # Python <= 2.5 does this for non-ASCII Unicode exceptions
+            line = format_error(getattr(err, 'message_only', "[unprintable exception message]"),
+                                getattr(err, 'position', None)) + '\n'
+        listing_file = threadlocal.cython_errors_listing_file
+        if listing_file:
+            try: listing_file.write(line)
+            except UnicodeEncodeError:
+                listing_file.write(line.encode('ASCII', 'replace'))
+        echo_file = threadlocal.cython_errors_echo_file
+        if echo_file:
+            try: echo_file.write(line)
+            except UnicodeEncodeError:
+                echo_file.write(line.encode('ASCII', 'replace'))
+        threadlocal.cython_errors_count += 1
+        if Options.fast_fail:
+            raise AbortError("fatal errors")
+
+def error(position, message):
+    #print("Errors.error:", repr(position), repr(message)) ###
+    if position is None:
+        raise InternalError(message)
+    err = CompileError(position, message)
+    if DebugFlags.debug_exception_on_error: raise Exception(err)  # debug
+    report_error(err)
+    return err
+
+
+LEVEL = 1  # warn about all errors level 1 or higher
+
+def _write_file_encode(file, line):
+    try:
+        file.write(line)
+    except UnicodeEncodeError:
+        file.write(line.encode('ascii', 'replace'))
+
+
+def performance_hint(position, message, env):
+    if not env.directives['show_performance_hints']:
+        return
+    warn = CompileWarning(position, message)
+    line = "performance hint: %s\n" % warn
+    listing_file = threadlocal.cython_errors_listing_file
+    if listing_file:
+        _write_file_encode(listing_file, line)
+    echo_file = threadlocal.cython_errors_echo_file
+    if echo_file:
+        _write_file_encode(echo_file, line)
+    return warn
+
+
+def message(position, message, level=1):
+    if level < LEVEL:
+        return
+    warn = CompileWarning(position, message)
+    line = "note: %s\n" % warn
+    listing_file = threadlocal.cython_errors_listing_file
+    if listing_file:
+        _write_file_encode(listing_file, line)
+    echo_file = threadlocal.cython_errors_echo_file
+    if echo_file:
+        _write_file_encode(echo_file, line)
+    return warn
+
+
+def warning(position, message, level=0):
+    if level < LEVEL:
+        return
+    if Options.warning_errors and position:
+        return error(position, message)
+    warn = CompileWarning(position, message)
+    line = "warning: %s\n" % warn
+    listing_file = threadlocal.cython_errors_listing_file
+    if listing_file:
+        _write_file_encode(listing_file, line)
+    echo_file = threadlocal.cython_errors_echo_file
+    if echo_file:
+        _write_file_encode(echo_file, line)
+    return warn
+
+
+def warn_once(position, message, level=0):
+    if level < LEVEL:
+        return
+    warn_once_seen = threadlocal.cython_errors_warn_once_seen
+    if message in warn_once_seen:
+        return
+    warn = CompileWarning(position, message)
+    line = "warning: %s\n" % warn
+    listing_file = threadlocal.cython_errors_listing_file
+    if listing_file:
+        _write_file_encode(listing_file, line)
+    echo_file = threadlocal.cython_errors_echo_file
+    if echo_file:
+        _write_file_encode(echo_file, line)
+    warn_once_seen.add(message)
+    return warn
+
+
+# These functions can be used to momentarily suppress errors.
+
+def hold_errors():
+    errors = []
+    threadlocal.cython_errors_stack.append(errors)
+    return errors
+
+
+def release_errors(ignore=False):
+    held_errors = threadlocal.cython_errors_stack.pop()
+    if not ignore:
+        for err in held_errors:
+            report_error(err)
+
+
+def held_errors():
+    return threadlocal.cython_errors_stack[-1]
+
+
+# same as context manager:
+
+@contextmanager
+def local_errors(ignore=False):
+    errors = hold_errors()
+    try:
+        yield errors
+    finally:
+        release_errors(ignore=ignore)
+
+
+# Keep all global state in thread local storage to support parallel cythonisation in distutils.
+
+def init_thread():
+    threadlocal.cython_errors_count = 0
+    threadlocal.cython_errors_listing_file = None
+    threadlocal.cython_errors_echo_file = None
+    threadlocal.cython_errors_warn_once_seen = set()
+    threadlocal.cython_errors_stack = []
+
+def reset():
+    threadlocal.cython_errors_warn_once_seen.clear()
+    del threadlocal.cython_errors_stack[:]
+
+def get_errors_count():
+    return threadlocal.cython_errors_count

venv/lib/python3.10/site-packages/Cython/Compiler/FlowControl.pxd

@@ -0,0 +1,97 @@
+cimport cython
+
+from .Visitor cimport CythonTransform, TreeVisitor
+
+cdef class ControlBlock:
+    cdef public set children
+    cdef public set parents
+    cdef public set positions
+    cdef public list stats
+    cdef public dict gen
+    cdef public set bounded
+
+    # Big integer bitsets
+    cdef public object i_input
+    cdef public object i_output
+    cdef public object i_gen
+    cdef public object i_kill
+    cdef public object i_state
+
+    cpdef bint empty(self)
+    cpdef detach(self)
+    cpdef add_child(self, block)
+
+cdef class ExitBlock(ControlBlock):
+    cpdef bint empty(self)
+
+cdef class NameAssignment:
+    cdef public bint is_arg
+    cdef public bint is_deletion
+    cdef public object lhs
+    cdef public object rhs
+    cdef public object entry
+    cdef public object pos
+    cdef public set refs
+    cdef public object bit
+    cdef public object inferred_type
+    cdef public object rhs_scope
+
+cdef class AssignmentList:
+    cdef public object bit
+    cdef public object mask
+    cdef public list stats
+
+cdef class AssignmentCollector(TreeVisitor):
+    cdef list assignments
+
+@cython.final
+cdef class ControlFlow:
+    cdef public set blocks
+    cdef public set entries
+    cdef public list loops
+    cdef public list exceptions
+
+    cdef public ControlBlock entry_point
+    cdef public ExitBlock exit_point
+    cdef public ControlBlock block
+
+    cdef public dict assmts
+
+    cdef public Py_ssize_t in_try_block
+
+    cpdef newblock(self, ControlBlock parent=*)
+    cpdef nextblock(self, ControlBlock parent=*)
+    cpdef bint is_tracked(self, entry)
+    cpdef bint is_statically_assigned(self, entry)
+    cpdef mark_position(self, node)
+    cpdef mark_assignment(self, lhs, rhs, entry, rhs_scope=*)
+    cpdef mark_argument(self, lhs, rhs, entry)
+    cpdef mark_deletion(self, node, entry)
+    cpdef mark_reference(self, node, entry)
+    cpdef normalize(self)
+    cpdef initialize(self)
+    cpdef set map_one(self, istate, entry)
+    cdef reaching_definitions(self)
+
+cdef class Uninitialized:
+    pass
+
+cdef class Unknown:
+    pass
+
+cdef class MessageCollection:
+    cdef set messages
+
+@cython.final
+cdef class ControlFlowAnalysis(CythonTransform):
+    cdef object gv_ctx
+    cdef object constant_folder
+    cdef set reductions
+    cdef list stack  # a stack of (env, flow) tuples
+    cdef object env
+    cdef ControlFlow flow
+    cdef object object_expr
+    cdef bint in_inplace_assignment
+
+    cpdef mark_assignment(self, lhs, rhs=*, rhs_scope=*)
+    cpdef mark_position(self, node)