mirror of
https://github.com/python/cpython.git
synced 2025-11-04 03:44:55 +00:00
35 lines
886 B
Python
35 lines
886 B
Python
# 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")
|
|
|
|
|
|
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"]
|