cpython/Lib/lib2to3/pygram.py

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# Copyright 2006 Google, Inc. All Rights Reserved.
# Licensed to PSF under a Contributor Agreement.
"""Export the Python grammar and symbols."""
# Python imports
import os
# Local imports
from .pgen2 import token
from .pgen2 import driver
from . import pytree
# The grammar file
_GRAMMAR_FILE = os.path.join(os.path.dirname(__file__), "Grammar.txt")
Merged revisions 83852-83853,83857,84042,84216,84274-84276,84375,85388,85478,85506-85508 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r83852 | benjamin.peterson | 2010-08-08 15:45:44 -0500 (Sun, 08 Aug 2010) | 1 line wrap with parens ........ r83853 | benjamin.peterson | 2010-08-08 15:46:31 -0500 (Sun, 08 Aug 2010) | 1 line use parens ........ r83857 | benjamin.peterson | 2010-08-08 15:59:49 -0500 (Sun, 08 Aug 2010) | 1 line things which use touch_import should be pre order ........ r84042 | george.boutsioukis | 2010-08-14 16:10:19 -0500 (Sat, 14 Aug 2010) | 2 lines This revision incorporates into the 2to3 tool the new, faster, tree matching algorithm developed during a GSOC project. The algorithm resides in the two added modules, btm_matcher and btm_utils. New code has been added to drive the new matching process in refactor.py and a few minor changes were made in other modules. A BM_compatible flag(False by default) has been added in fixer_base and it is set to True in most of the current fixers. ........ r84216 | benjamin.peterson | 2010-08-19 16:44:05 -0500 (Thu, 19 Aug 2010) | 1 line allow star_expr in testlist_gexp ........ r84274 | benjamin.peterson | 2010-08-22 18:40:46 -0500 (Sun, 22 Aug 2010) | 1 line wrap long line ........ r84275 | benjamin.peterson | 2010-08-22 18:42:22 -0500 (Sun, 22 Aug 2010) | 1 line cleanup ........ r84276 | benjamin.peterson | 2010-08-22 18:51:01 -0500 (Sun, 22 Aug 2010) | 1 line when there's a None value and a traceback, don't call type with it #9661 ........ r84375 | george.boutsioukis | 2010-08-31 08:38:53 -0500 (Tue, 31 Aug 2010) | 3 lines Idiomatic code changes & stylistic issues fixed in the BottomMatcher module. Thanks to Benjamin Peterson for taking the time to review the code. ........ r85388 | benjamin.peterson | 2010-10-12 17:27:44 -0500 (Tue, 12 Oct 2010) | 1 line fix urllib fixer with multiple as imports on a line #10069 ........ r85478 | benjamin.peterson | 2010-10-14 08:09:56 -0500 (Thu, 14 Oct 2010) | 1 line stop abusing docstrings ........ r85506 | benjamin.peterson | 2010-10-14 17:45:19 -0500 (Thu, 14 Oct 2010) | 1 line kill sibling import ........ r85507 | benjamin.peterson | 2010-10-14 17:54:15 -0500 (Thu, 14 Oct 2010) | 1 line remove trailing whitespace ........ r85508 | benjamin.peterson | 2010-10-14 17:55:28 -0500 (Thu, 14 Oct 2010) | 1 line typo ........
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_PATTERN_GRAMMAR_FILE = os.path.join(os.path.dirname(__file__),
"PatternGrammar.txt")
class Symbols(object):
def __init__(self, grammar):
"""Initializer.
Creates an attribute for each grammar symbol (nonterminal),
whose value is the symbol's type (an int >= 256).
"""
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for name, symbol in grammar.symbol2number.items():
setattr(self, name, symbol)
python_grammar = driver.load_packaged_grammar("lib2to3", _GRAMMAR_FILE)
Merged revisions 74114 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ................ r74114 | benjamin.peterson | 2009-07-20 10:33:09 -0500 (Mon, 20 Jul 2009) | 110 lines Merged revisions 73771,73811,73840,73842,73848-73849,73861,73957-73960,73964-73969,73972-73974,73977,73981,73984,74065,74113 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r73771 | benjamin.peterson | 2009-07-02 10:56:55 -0500 (Thu, 02 Jul 2009) | 1 line force the imports fixer to be run after the import one #6400 ........ r73811 | benjamin.peterson | 2009-07-03 09:03:14 -0500 (Fri, 03 Jul 2009) | 1 line check for sep, not pathsep when looking for a subpackage #6408 ........ r73840 | benjamin.peterson | 2009-07-04 09:52:28 -0500 (Sat, 04 Jul 2009) | 1 line don't print diffs by default; it's annoying ........ r73842 | benjamin.peterson | 2009-07-04 09:58:46 -0500 (Sat, 04 Jul 2009) | 1 line complain when not showing diffs or writing ........ r73848 | alexandre.vassalotti | 2009-07-04 23:38:19 -0500 (Sat, 04 Jul 2009) | 2 lines Fix test_refactor_stdin to handle print_output() method with 4 arguments. ........ r73849 | alexandre.vassalotti | 2009-07-04 23:43:18 -0500 (Sat, 04 Jul 2009) | 5 lines Issue 2370: Add fixer for the removal of operator.isCallable() and operator.sequenceIncludes(). Patch contributed by Jeff Balogh (and updated by me). ........ r73861 | benjamin.peterson | 2009-07-05 09:15:53 -0500 (Sun, 05 Jul 2009) | 1 line cleanup and use unicode where appropiate ........ r73957 | benjamin.peterson | 2009-07-11 15:49:56 -0500 (Sat, 11 Jul 2009) | 1 line fix calls to str() with unicode() ........ r73958 | benjamin.peterson | 2009-07-11 15:51:51 -0500 (Sat, 11 Jul 2009) | 1 line more str() -> unicode() ........ r73959 | benjamin.peterson | 2009-07-11 16:40:08 -0500 (Sat, 11 Jul 2009) | 1 line add tests for refactor_dir() ........ r73960 | benjamin.peterson | 2009-07-11 16:44:32 -0500 (Sat, 11 Jul 2009) | 1 line don't parse files just because they end with 'py' (no dot) ........ r73964 | benjamin.peterson | 2009-07-11 17:30:15 -0500 (Sat, 11 Jul 2009) | 1 line simplify ........ r73965 | benjamin.peterson | 2009-07-11 17:31:30 -0500 (Sat, 11 Jul 2009) | 1 line remove usage of get_prefix() ........ r73966 | benjamin.peterson | 2009-07-11 17:33:35 -0500 (Sat, 11 Jul 2009) | 1 line revert unintended change in 73965 ........ r73967 | benjamin.peterson | 2009-07-11 17:34:44 -0500 (Sat, 11 Jul 2009) | 1 line avoid expensive checks and assume the node did change ........ r73968 | benjamin.peterson | 2009-07-11 20:46:46 -0500 (Sat, 11 Jul 2009) | 1 line use a regular dict for the heads to avoid adding lists in the loop ........ r73969 | benjamin.peterson | 2009-07-11 20:50:43 -0500 (Sat, 11 Jul 2009) | 1 line prefix headnode functions with '_' ........ r73972 | benjamin.peterson | 2009-07-11 21:25:45 -0500 (Sat, 11 Jul 2009) | 1 line try to make the head node dict as sparse as possible ........ r73973 | benjamin.peterson | 2009-07-11 21:59:49 -0500 (Sat, 11 Jul 2009) | 1 line a better idea; add an option to *not* print diffs ........ r73974 | benjamin.peterson | 2009-07-11 22:00:29 -0500 (Sat, 11 Jul 2009) | 1 line add space ........ r73977 | benjamin.peterson | 2009-07-12 10:16:07 -0500 (Sun, 12 Jul 2009) | 1 line update get_headnode_dict tests for recent changes ........ r73981 | benjamin.peterson | 2009-07-12 12:06:39 -0500 (Sun, 12 Jul 2009) | 4 lines detect when "from __future__ import print_function" is given Deprecate the 'print_function' option and the -p flag ........ r73984 | benjamin.peterson | 2009-07-12 16:16:37 -0500 (Sun, 12 Jul 2009) | 1 line add tests for Call; thanks Joe Amenta ........ r74065 | benjamin.peterson | 2009-07-17 12:52:49 -0500 (Fri, 17 Jul 2009) | 1 line pathname2url and url2pathname are in urllib.request not urllib.parse #6496 ........ r74113 | benjamin.peterson | 2009-07-20 08:56:57 -0500 (Mon, 20 Jul 2009) | 1 line fix deprecation warnings in tests ........ ................
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python_symbols = Symbols(python_grammar)
Merged revisions 74114 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ................ r74114 | benjamin.peterson | 2009-07-20 10:33:09 -0500 (Mon, 20 Jul 2009) | 110 lines Merged revisions 73771,73811,73840,73842,73848-73849,73861,73957-73960,73964-73969,73972-73974,73977,73981,73984,74065,74113 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r73771 | benjamin.peterson | 2009-07-02 10:56:55 -0500 (Thu, 02 Jul 2009) | 1 line force the imports fixer to be run after the import one #6400 ........ r73811 | benjamin.peterson | 2009-07-03 09:03:14 -0500 (Fri, 03 Jul 2009) | 1 line check for sep, not pathsep when looking for a subpackage #6408 ........ r73840 | benjamin.peterson | 2009-07-04 09:52:28 -0500 (Sat, 04 Jul 2009) | 1 line don't print diffs by default; it's annoying ........ r73842 | benjamin.peterson | 2009-07-04 09:58:46 -0500 (Sat, 04 Jul 2009) | 1 line complain when not showing diffs or writing ........ r73848 | alexandre.vassalotti | 2009-07-04 23:38:19 -0500 (Sat, 04 Jul 2009) | 2 lines Fix test_refactor_stdin to handle print_output() method with 4 arguments. ........ r73849 | alexandre.vassalotti | 2009-07-04 23:43:18 -0500 (Sat, 04 Jul 2009) | 5 lines Issue 2370: Add fixer for the removal of operator.isCallable() and operator.sequenceIncludes(). Patch contributed by Jeff Balogh (and updated by me). ........ r73861 | benjamin.peterson | 2009-07-05 09:15:53 -0500 (Sun, 05 Jul 2009) | 1 line cleanup and use unicode where appropiate ........ r73957 | benjamin.peterson | 2009-07-11 15:49:56 -0500 (Sat, 11 Jul 2009) | 1 line fix calls to str() with unicode() ........ r73958 | benjamin.peterson | 2009-07-11 15:51:51 -0500 (Sat, 11 Jul 2009) | 1 line more str() -> unicode() ........ r73959 | benjamin.peterson | 2009-07-11 16:40:08 -0500 (Sat, 11 Jul 2009) | 1 line add tests for refactor_dir() ........ r73960 | benjamin.peterson | 2009-07-11 16:44:32 -0500 (Sat, 11 Jul 2009) | 1 line don't parse files just because they end with 'py' (no dot) ........ r73964 | benjamin.peterson | 2009-07-11 17:30:15 -0500 (Sat, 11 Jul 2009) | 1 line simplify ........ r73965 | benjamin.peterson | 2009-07-11 17:31:30 -0500 (Sat, 11 Jul 2009) | 1 line remove usage of get_prefix() ........ r73966 | benjamin.peterson | 2009-07-11 17:33:35 -0500 (Sat, 11 Jul 2009) | 1 line revert unintended change in 73965 ........ r73967 | benjamin.peterson | 2009-07-11 17:34:44 -0500 (Sat, 11 Jul 2009) | 1 line avoid expensive checks and assume the node did change ........ r73968 | benjamin.peterson | 2009-07-11 20:46:46 -0500 (Sat, 11 Jul 2009) | 1 line use a regular dict for the heads to avoid adding lists in the loop ........ r73969 | benjamin.peterson | 2009-07-11 20:50:43 -0500 (Sat, 11 Jul 2009) | 1 line prefix headnode functions with '_' ........ r73972 | benjamin.peterson | 2009-07-11 21:25:45 -0500 (Sat, 11 Jul 2009) | 1 line try to make the head node dict as sparse as possible ........ r73973 | benjamin.peterson | 2009-07-11 21:59:49 -0500 (Sat, 11 Jul 2009) | 1 line a better idea; add an option to *not* print diffs ........ r73974 | benjamin.peterson | 2009-07-11 22:00:29 -0500 (Sat, 11 Jul 2009) | 1 line add space ........ r73977 | benjamin.peterson | 2009-07-12 10:16:07 -0500 (Sun, 12 Jul 2009) | 1 line update get_headnode_dict tests for recent changes ........ r73981 | benjamin.peterson | 2009-07-12 12:06:39 -0500 (Sun, 12 Jul 2009) | 4 lines detect when "from __future__ import print_function" is given Deprecate the 'print_function' option and the -p flag ........ r73984 | benjamin.peterson | 2009-07-12 16:16:37 -0500 (Sun, 12 Jul 2009) | 1 line add tests for Call; thanks Joe Amenta ........ r74065 | benjamin.peterson | 2009-07-17 12:52:49 -0500 (Fri, 17 Jul 2009) | 1 line pathname2url and url2pathname are in urllib.request not urllib.parse #6496 ........ r74113 | benjamin.peterson | 2009-07-20 08:56:57 -0500 (Mon, 20 Jul 2009) | 1 line fix deprecation warnings in tests ........ ................
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python_grammar_no_print_statement = python_grammar.copy()
del python_grammar_no_print_statement.keywords["print"]
Merged revisions 83852-83853,83857,84042,84216,84274-84276,84375,85388,85478,85506-85508 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r83852 | benjamin.peterson | 2010-08-08 15:45:44 -0500 (Sun, 08 Aug 2010) | 1 line wrap with parens ........ r83853 | benjamin.peterson | 2010-08-08 15:46:31 -0500 (Sun, 08 Aug 2010) | 1 line use parens ........ r83857 | benjamin.peterson | 2010-08-08 15:59:49 -0500 (Sun, 08 Aug 2010) | 1 line things which use touch_import should be pre order ........ r84042 | george.boutsioukis | 2010-08-14 16:10:19 -0500 (Sat, 14 Aug 2010) | 2 lines This revision incorporates into the 2to3 tool the new, faster, tree matching algorithm developed during a GSOC project. The algorithm resides in the two added modules, btm_matcher and btm_utils. New code has been added to drive the new matching process in refactor.py and a few minor changes were made in other modules. A BM_compatible flag(False by default) has been added in fixer_base and it is set to True in most of the current fixers. ........ r84216 | benjamin.peterson | 2010-08-19 16:44:05 -0500 (Thu, 19 Aug 2010) | 1 line allow star_expr in testlist_gexp ........ r84274 | benjamin.peterson | 2010-08-22 18:40:46 -0500 (Sun, 22 Aug 2010) | 1 line wrap long line ........ r84275 | benjamin.peterson | 2010-08-22 18:42:22 -0500 (Sun, 22 Aug 2010) | 1 line cleanup ........ r84276 | benjamin.peterson | 2010-08-22 18:51:01 -0500 (Sun, 22 Aug 2010) | 1 line when there's a None value and a traceback, don't call type with it #9661 ........ r84375 | george.boutsioukis | 2010-08-31 08:38:53 -0500 (Tue, 31 Aug 2010) | 3 lines Idiomatic code changes & stylistic issues fixed in the BottomMatcher module. Thanks to Benjamin Peterson for taking the time to review the code. ........ r85388 | benjamin.peterson | 2010-10-12 17:27:44 -0500 (Tue, 12 Oct 2010) | 1 line fix urllib fixer with multiple as imports on a line #10069 ........ r85478 | benjamin.peterson | 2010-10-14 08:09:56 -0500 (Thu, 14 Oct 2010) | 1 line stop abusing docstrings ........ r85506 | benjamin.peterson | 2010-10-14 17:45:19 -0500 (Thu, 14 Oct 2010) | 1 line kill sibling import ........ r85507 | benjamin.peterson | 2010-10-14 17:54:15 -0500 (Thu, 14 Oct 2010) | 1 line remove trailing whitespace ........ r85508 | benjamin.peterson | 2010-10-14 17:55:28 -0500 (Thu, 14 Oct 2010) | 1 line typo ........
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python_grammar_no_print_and_exec_statement = python_grammar_no_print_statement.copy()
del python_grammar_no_print_and_exec_statement.keywords["exec"]
pattern_grammar = driver.load_packaged_grammar("lib2to3", _PATTERN_GRAMMAR_FILE)
Merged revisions 83852-83853,83857,84042,84216,84274-84276,84375,85388,85478,85506-85508 via svnmerge from svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3 ........ r83852 | benjamin.peterson | 2010-08-08 15:45:44 -0500 (Sun, 08 Aug 2010) | 1 line wrap with parens ........ r83853 | benjamin.peterson | 2010-08-08 15:46:31 -0500 (Sun, 08 Aug 2010) | 1 line use parens ........ r83857 | benjamin.peterson | 2010-08-08 15:59:49 -0500 (Sun, 08 Aug 2010) | 1 line things which use touch_import should be pre order ........ r84042 | george.boutsioukis | 2010-08-14 16:10:19 -0500 (Sat, 14 Aug 2010) | 2 lines This revision incorporates into the 2to3 tool the new, faster, tree matching algorithm developed during a GSOC project. The algorithm resides in the two added modules, btm_matcher and btm_utils. New code has been added to drive the new matching process in refactor.py and a few minor changes were made in other modules. A BM_compatible flag(False by default) has been added in fixer_base and it is set to True in most of the current fixers. ........ r84216 | benjamin.peterson | 2010-08-19 16:44:05 -0500 (Thu, 19 Aug 2010) | 1 line allow star_expr in testlist_gexp ........ r84274 | benjamin.peterson | 2010-08-22 18:40:46 -0500 (Sun, 22 Aug 2010) | 1 line wrap long line ........ r84275 | benjamin.peterson | 2010-08-22 18:42:22 -0500 (Sun, 22 Aug 2010) | 1 line cleanup ........ r84276 | benjamin.peterson | 2010-08-22 18:51:01 -0500 (Sun, 22 Aug 2010) | 1 line when there's a None value and a traceback, don't call type with it #9661 ........ r84375 | george.boutsioukis | 2010-08-31 08:38:53 -0500 (Tue, 31 Aug 2010) | 3 lines Idiomatic code changes & stylistic issues fixed in the BottomMatcher module. Thanks to Benjamin Peterson for taking the time to review the code. ........ r85388 | benjamin.peterson | 2010-10-12 17:27:44 -0500 (Tue, 12 Oct 2010) | 1 line fix urllib fixer with multiple as imports on a line #10069 ........ r85478 | benjamin.peterson | 2010-10-14 08:09:56 -0500 (Thu, 14 Oct 2010) | 1 line stop abusing docstrings ........ r85506 | benjamin.peterson | 2010-10-14 17:45:19 -0500 (Thu, 14 Oct 2010) | 1 line kill sibling import ........ r85507 | benjamin.peterson | 2010-10-14 17:54:15 -0500 (Thu, 14 Oct 2010) | 1 line remove trailing whitespace ........ r85508 | benjamin.peterson | 2010-10-14 17:55:28 -0500 (Thu, 14 Oct 2010) | 1 line typo ........
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pattern_symbols = Symbols(pattern_grammar)