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v0.8.1
v0.8.1
Revision e93b63b74b101c65807af7d9311de70012a2e49d authored by Antoine Pitrou on 04 September 2013, 18:46:33 UTC, committed by Antoine Pitrou on 04 September 2013, 18:46:33 UTC
Patch by Erik Bray.
1 parent c9e1dcd
pygram.py
# 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")
_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).
"""
for name, symbol in grammar.symbol2number.items():
setattr(self, name, symbol)
python_grammar = driver.load_grammar(_GRAMMAR_FILE)
python_symbols = Symbols(python_grammar)
python_grammar_no_print_statement = python_grammar.copy()
del python_grammar_no_print_statement.keywords["print"]
pattern_grammar = driver.load_grammar(_PATTERN_GRAMMAR_FILE)
pattern_symbols = Symbols(pattern_grammar)
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