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svn+ssh://pythondev@svn.python.org/python/trunk ................ r73370 | benjamin.peterson | 2009-06-11 17:06:46 -0500 (Thu, 11 Jun 2009) | 105 lines Merged revisions 72523,72950-72951,72994,73003,73033,73036-73040,73091-73093,73096,73179-73181,73192,73231,73244,73255-73256,73365 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r72523 | benjamin.peterson | 2009-05-09 14:42:26 -0500 (Sat, 09 May 2009) | 1 line remove parenthesis ........ r72950 | benjamin.peterson | 2009-05-26 18:19:45 -0500 (Tue, 26 May 2009) | 1 line remove unused imports ........ r72951 | benjamin.peterson | 2009-05-26 18:27:00 -0500 (Tue, 26 May 2009) | 1 line this is no longer executable ........ r72994 | benjamin.peterson | 2009-05-28 15:32:54 -0500 (Thu, 28 May 2009) | 1 line fix test_all_fixers on Windows #6134 ........ r73003 | benjamin.peterson | 2009-05-28 21:57:28 -0500 (Thu, 28 May 2009) | 4 lines make 2to3 test utilities easier to use with other applications (3to2) Patch by Joe Amenta ........ r73033 | benjamin.peterson | 2009-05-29 16:58:32 -0500 (Fri, 29 May 2009) | 1 line update grammar for multi with statement ........ r73036 | benjamin.peterson | 2009-05-29 17:33:20 -0500 (Fri, 29 May 2009) | 1 line simplify fix_unicode ........ r73037 | benjamin.peterson | 2009-05-29 17:53:03 -0500 (Fri, 29 May 2009) | 1 line add custom error for pattern syntax errors ........ r73038 | benjamin.peterson | 2009-05-29 17:55:00 -0500 (Fri, 29 May 2009) | 1 line complain if details are attached to a token ........ r73039 | benjamin.peterson | 2009-05-29 18:00:28 -0500 (Fri, 29 May 2009) | 1 line add a test for whitespace ........ r73040 | benjamin.peterson | 2009-05-29 18:01:17 -0500 (Fri, 29 May 2009) | 1 line a fix for emacs highlighting ........ r73091 | benjamin.peterson | 2009-05-31 20:55:25 -0500 (Sun, 31 May 2009) | 1 line deprecate set_prefix() and get_prefix() in favor of a prefix property ........ r73092 | benjamin.peterson | 2009-05-31 21:00:51 -0500 (Sun, 31 May 2009) | 1 line change hideous java naming scheme ........ r73093 | benjamin.peterson | 2009-05-31 21:01:39 -0500 (Sun, 31 May 2009) | 1 line remove dated comment ........ r73096 | benjamin.peterson | 2009-05-31 21:40:53 -0500 (Sun, 31 May 2009) | 1 line group tests ........ r73179 | benjamin.peterson | 2009-06-03 13:09:53 -0500 (Wed, 03 Jun 2009) | 1 line handle the case where there's multiple trailers #6185 ........ r73180 | benjamin.peterson | 2009-06-03 13:18:05 -0500 (Wed, 03 Jun 2009) | 1 line scrap __main__ section ........ r73181 | benjamin.peterson | 2009-06-03 13:24:48 -0500 (Wed, 03 Jun 2009) | 1 line remove shebang lines and __main__ sections ........ r73192 | benjamin.peterson | 2009-06-03 19:16:30 -0500 (Wed, 03 Jun 2009) | 4 lines actually test something here Thanks to Joe Amenta for noticing.y ........ r73231 | benjamin.peterson | 2009-06-04 13:38:50 -0500 (Thu, 04 Jun 2009) | 1 line remove unused variable ........ r73244 | benjamin.peterson | 2009-06-05 08:39:25 -0500 (Fri, 05 Jun 2009) | 1 line allow fixers to give different options in setUp ........ r73255 | benjamin.peterson | 2009-06-06 11:23:46 -0500 (Sat, 06 Jun 2009) | 1 line fix the except fixer on one line suites #6222 ........ r73256 | benjamin.peterson | 2009-06-06 11:27:40 -0500 (Sat, 06 Jun 2009) | 1 line test one-line else and finally clauses ........ r73365 | benjamin.peterson | 2009-06-11 17:01:32 -0500 (Thu, 11 Jun 2009) | 1 line normalize whitespace ........ ................
102 lines
3.1 KiB
Python
102 lines
3.1 KiB
Python
"""Fixer for it.next() -> next(it), per PEP 3114."""
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# Author: Collin Winter
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# Things that currently aren't covered:
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# - listcomp "next" names aren't warned
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# - "with" statement targets aren't checked
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# Local imports
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from ..pgen2 import token
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from ..pygram import python_symbols as syms
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from .. import fixer_base
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from ..fixer_util import Name, Call, find_binding
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bind_warning = "Calls to builtin next() possibly shadowed by global binding"
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class FixNext(fixer_base.BaseFix):
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PATTERN = """
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power< base=any+ trailer< '.' attr='next' > trailer< '(' ')' > >
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power< head=any+ trailer< '.' attr='next' > not trailer< '(' ')' > >
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classdef< 'class' any+ ':'
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suite< any*
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funcdef< 'def'
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name='next'
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parameters< '(' NAME ')' > any+ >
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any* > >
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global=global_stmt< 'global' any* 'next' any* >
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"""
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order = "pre" # Pre-order tree traversal
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def start_tree(self, tree, filename):
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super(FixNext, self).start_tree(tree, filename)
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n = find_binding('next', tree)
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if n:
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self.warning(n, bind_warning)
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self.shadowed_next = True
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else:
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self.shadowed_next = False
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def transform(self, node, results):
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assert results
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base = results.get("base")
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attr = results.get("attr")
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name = results.get("name")
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if base:
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if self.shadowed_next:
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attr.replace(Name("__next__", prefix=attr.prefix))
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else:
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base = [n.clone() for n in base]
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base[0].prefix = ""
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node.replace(Call(Name("next", prefix=node.prefix), base))
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elif name:
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n = Name("__next__", prefix=name.prefix)
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name.replace(n)
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elif attr:
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# We don't do this transformation if we're assigning to "x.next".
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# Unfortunately, it doesn't seem possible to do this in PATTERN,
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# so it's being done here.
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if is_assign_target(node):
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head = results["head"]
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if "".join([str(n) for n in head]).strip() == '__builtin__':
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self.warning(node, bind_warning)
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return
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attr.replace(Name("__next__"))
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elif "global" in results:
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self.warning(node, bind_warning)
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self.shadowed_next = True
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### The following functions help test if node is part of an assignment
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### target.
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def is_assign_target(node):
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assign = find_assign(node)
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if assign is None:
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return False
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for child in assign.children:
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if child.type == token.EQUAL:
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return False
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elif is_subtree(child, node):
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return True
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return False
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def find_assign(node):
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if node.type == syms.expr_stmt:
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return node
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if node.type == syms.simple_stmt or node.parent is None:
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return None
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return find_assign(node.parent)
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def is_subtree(root, node):
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if root == node:
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return True
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return any([is_subtree(c, node) for c in root.children])
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