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61 lines
1.6 KiB
Python
61 lines
1.6 KiB
Python
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"""Generate Lib/keyword.py from the Grammar and Tokens files using pgen"""
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import argparse
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from .pgen import ParserGenerator
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TEMPLATE = r'''
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"""Keywords (from "Grammar/Grammar")
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This file is automatically generated; please don't muck it up!
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To update the symbols in this file, 'cd' to the top directory of
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the python source tree and run:
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python3 -m Parser.pgen.keywordgen Grammar/Grammar \
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Grammar/Tokens \
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Lib/keyword.py
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Alternatively, you can run 'make regen-keyword'.
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"""
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__all__ = ["iskeyword", "kwlist"]
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kwlist = [
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{keywords}
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]
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iskeyword = frozenset(kwlist).__contains__
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'''.lstrip()
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EXTRA_KEYWORDS = ["async", "await"]
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def main():
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parser = argparse.ArgumentParser(description="Generate the Lib/keywords.py "
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"file from the grammar.")
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parser.add_argument(
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"grammar", type=str, help="The file with the grammar definition in EBNF format"
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)
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parser.add_argument(
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"tokens", type=str, help="The file with the token definitions"
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)
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parser.add_argument(
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"keyword_file",
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type=argparse.FileType('w'),
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help="The path to write the keyword definitions",
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)
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args = parser.parse_args()
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p = ParserGenerator(args.grammar, args.tokens)
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grammar = p.make_grammar()
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with args.keyword_file as thefile:
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all_keywords = sorted(list(grammar.keywords) + EXTRA_KEYWORDS)
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keywords = ",\n ".join(map(repr, all_keywords))
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thefile.write(TEMPLATE.format(keywords=keywords))
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if __name__ == "__main__":
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main()
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