File size: 2,027 Bytes
43203b4 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | (in-package :cl-syntax)
(eval-when (:compile-toplevel :load-toplevel :execute)
(defun package-syntax-name (package)
(intern *standard-package-syntax-name* package)))
(defun get-options (name)
"Get the options list for name, if it is available."
(get (cond ((typep name 'syntax) nil)
((and (typep name 'package-designator)
(find-package name))
(package-syntax-name name))
(t name))
:options))
(defmacro defsyntax (name &body options)
`(progn
(setf (get ',name :options) ',options)
(defvar ,name (defreadtable ,name ,@options))))
(defmacro define-package-syntax (&body (package . options))
(unless (typep package 'package-designator)
(push package options)
(setq package *package*))
`(defsyntax ,(package-syntax-name package)
,@options))
(defun find-syntax (name)
(declare (syntax-designator name))
(cond ((typep name 'syntax) name)
((and (typep name 'package-designator)
(find-package name))
(find-readtable (package-syntax-name name)))
(t (find-readtable name))))
(defun %use-syntax (names)
(declare (type (or syntax-designator
(proper-list syntax-designator))
names))
(unless (listp names)
(setq names (list names)))
(setq *readtable* (copy-readtable))
(loop for name in names
for syntax = (find-syntax name)
for options = (get-options name)
if (assoc :fuze (if (consp (car options)) options (cdr options))) do
(handler-bind ((named-readtables:reader-macro-conflict
(lambda (_) (declare (ignore _))
(invoke-restart 'continue))))
(merge-readtables-into *readtable* syntax) )
else do
(merge-readtables-into *readtable* syntax) )
(when (find-package :swank)
(named-readtables::%frob-swank-readtable-alist *package* *readtable*)))
(defmacro use-syntax (name)
`(eval-when (:compile-toplevel :load-toplevel :execute)
(%use-syntax ,name)))
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