| | """Fixer for generator.throw(E, V, T). |
| | |
| | g.throw(E) -> g.throw(E) |
| | g.throw(E, V) -> g.throw(E(V)) |
| | g.throw(E, V, T) -> g.throw(E(V).with_traceback(T)) |
| | |
| | g.throw("foo"[, V[, T]]) will warn about string exceptions.""" |
| | |
| |
|
| | |
| | from .. import pytree |
| | from ..pgen2 import token |
| | from .. import fixer_base |
| | from ..fixer_util import Name, Call, ArgList, Attr, is_tuple |
| |
|
| | class FixThrow(fixer_base.BaseFix): |
| | BM_compatible = True |
| | PATTERN = """ |
| | power< any trailer< '.' 'throw' > |
| | trailer< '(' args=arglist< exc=any ',' val=any [',' tb=any] > ')' > |
| | > |
| | | |
| | power< any trailer< '.' 'throw' > trailer< '(' exc=any ')' > > |
| | """ |
| |
|
| | def transform(self, node, results): |
| | syms = self.syms |
| |
|
| | exc = results["exc"].clone() |
| | if exc.type is token.STRING: |
| | self.cannot_convert(node, "Python 3 does not support string exceptions") |
| | return |
| |
|
| | |
| | val = results.get("val") |
| | if val is None: |
| | return |
| |
|
| | val = val.clone() |
| | if is_tuple(val): |
| | args = [c.clone() for c in val.children[1:-1]] |
| | else: |
| | val.prefix = "" |
| | args = [val] |
| |
|
| | throw_args = results["args"] |
| |
|
| | if "tb" in results: |
| | tb = results["tb"].clone() |
| | tb.prefix = "" |
| |
|
| | e = Call(exc, args) |
| | with_tb = Attr(e, Name('with_traceback')) + [ArgList([tb])] |
| | throw_args.replace(pytree.Node(syms.power, with_tb)) |
| | else: |
| | throw_args.replace(Call(exc, args)) |
| |
|
