"""Fixer for 'raise E, V, T' raise -> raise raise E -> raise E raise E, V -> raise E(V) raise E, V, T -> raise E(V).with_traceback(T) raise E, None, T -> raise E.with_traceback(T) raise (((E, E'), E''), E'''), V -> raise E(V) raise "foo", V, T -> warns about string exceptions CAVEATS: 1) "raise E, V" will be incorrectly translated if V is an exception instance. The correct Python 3 idiom is raise E from V but since we can't detect instance-hood by syntax alone and since any client code would have to be changed as well, we don't automate this. """ # Author: Collin Winter # Local imports from .. import pytree from ..pgen2 import token from .. import fixer_base from ..fixer_util import Name, Call, Attr, ArgList, is_tuple class FixRaise(fixer_base.BaseFix): BM_compatible = True PATTERN = """ raise_stmt< 'raise' exc=any [',' val=any [',' tb=any]] > """ def transform(self, node, results): syms = self.syms exc = results["exc"].clone() if exc.type == token.STRING: msg = "Python 3 does not support string exceptions" self.cannot_convert(node, msg) return # Python 2 supports # raise ((((E1, E2), E3), E4), E5), V # as a synonym for # raise E1, V # Since Python 3 will not support this, we recurse down any tuple # literals, always taking the first element. if is_tuple(exc): while is_tuple(exc): # exc.children[1:-1] is the unparenthesized tuple # exc.children[1].children[0] is the first element of the tuple exc = exc.children[1].children[0].clone() exc.prefix = " " if "val" not in results: # One-argument raise new = pytree.Node(syms.raise_stmt, [Name("raise"), exc]) new.prefix = node.prefix return new val = results["val"].clone() if is_tuple(val): args = [c.clone() for c in val.children[1:-1]] else: val.prefix = "" args = [val] if "tb" in results: tb = results["tb"].clone() tb.prefix = "" e = exc # If there's a traceback and None is passed as the value, then don't # add a call, since the user probably just wants to add a # traceback. See issue #9661. if val.type != token.NAME or val.value != "None": e = Call(exc, args) with_tb = Attr(e, Name('with_traceback')) + [ArgList([tb])] new = pytree.Node(syms.simple_stmt, [Name("raise")] + with_tb) new.prefix = node.prefix return new else: return pytree.Node(syms.raise_stmt, [Name("raise"), Call(exc, args)], prefix=node.prefix)
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__pycache__ | Folder | 0755 |
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__init__.py | File | 47 B | 0644 |
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fix_apply.py | File | 2.37 KB | 0644 |
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fix_asserts.py | File | 984 B | 0644 |
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fix_basestring.py | File | 320 B | 0644 |
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fix_buffer.py | File | 590 B | 0644 |
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fix_dict.py | File | 3.67 KB | 0644 |
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fix_except.py | File | 3.27 KB | 0644 |
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fix_exec.py | File | 979 B | 0644 |
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fix_execfile.py | File | 2 KB | 0644 |
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fix_exitfunc.py | File | 2.44 KB | 0644 |
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fix_filter.py | File | 2.59 KB | 0644 |
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fix_funcattrs.py | File | 644 B | 0644 |
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fix_future.py | File | 547 B | 0644 |
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fix_getcwdu.py | File | 451 B | 0644 |
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fix_has_key.py | File | 3.12 KB | 0644 |
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fix_idioms.py | File | 4.76 KB | 0644 |
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fix_import.py | File | 3.18 KB | 0644 |
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fix_imports.py | File | 5.55 KB | 0644 |
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fix_imports2.py | File | 289 B | 0644 |
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fix_input.py | File | 708 B | 0644 |
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fix_intern.py | File | 1.21 KB | 0644 |
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fix_isinstance.py | File | 1.57 KB | 0644 |
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fix_itertools.py | File | 1.51 KB | 0644 |
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fix_itertools_imports.py | File | 2.04 KB | 0644 |
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fix_long.py | File | 476 B | 0644 |
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fix_map.py | File | 3.55 KB | 0644 |
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fix_metaclass.py | File | 8 KB | 0644 |
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fix_methodattrs.py | File | 606 B | 0644 |
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fix_ne.py | File | 571 B | 0644 |
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fix_next.py | File | 3.1 KB | 0644 |
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fix_nonzero.py | File | 591 B | 0644 |
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fix_numliterals.py | File | 768 B | 0644 |
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fix_operator.py | File | 3.39 KB | 0644 |
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fix_paren.py | File | 1.2 KB | 0644 |
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fix_print.py | File | 2.78 KB | 0644 |
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fix_raise.py | File | 2.86 KB | 0644 |
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fix_raw_input.py | File | 454 B | 0644 |
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fix_reduce.py | File | 837 B | 0644 |
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fix_reload.py | File | 1.13 KB | 0644 |
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fix_renames.py | File | 2.17 KB | 0644 |
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fix_repr.py | File | 613 B | 0644 |
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fix_set_literal.py | File | 1.66 KB | 0644 |
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fix_standarderror.py | File | 449 B | 0644 |
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fix_sys_exc.py | File | 1.01 KB | 0644 |
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fix_throw.py | File | 1.54 KB | 0644 |
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fix_tuple_params.py | File | 5.43 KB | 0644 |
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fix_types.py | File | 1.73 KB | 0644 |
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fix_unicode.py | File | 1.23 KB | 0644 |
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fix_urllib.py | File | 8.16 KB | 0644 |
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fix_ws_comma.py | File | 1.06 KB | 0644 |
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fix_xrange.py | File | 2.63 KB | 0644 |
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fix_xreadlines.py | File | 689 B | 0644 |
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fix_zip.py | File | 1.26 KB | 0644 |
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