bpo-40939: Remove the old parser (GH-20768)

This commit removes the old parser, the deprecated parser module, the old parser compatibility flags and environment variables and all associated support code and documentation.

1 files changed, 0 insertions, 59 deletions

diff --git a/Parser/pgen/keywordgen.py b/Parser/pgen/keywordgen.py
deleted file mode 100644
index f0234a81b6..0000000000
--- a/Parser/pgen/keywordgen.py
+++ /dev/null
@@ -1,59 +0,0 @@
-"""Generate Lib/keyword.py from the Grammar and Tokens files using pgen"""
-
-import argparse
-
-from .pgen import ParserGenerator
-
-TEMPLATE = r'''
-"""Keywords (from "Grammar/Grammar")
-
-This file is automatically generated; please don't muck it up!
-
-To update the symbols in this file, 'cd' to the top directory of
-the python source tree and run:
-
-    python3 -m Parser.pgen.keywordgen Grammar/Grammar \
-                                      Grammar/Tokens \
-                                      Lib/keyword.py
-
-Alternatively, you can run 'make regen-keyword'.
-"""
-
-__all__ = ["iskeyword", "kwlist"]
-
-kwlist = [
-    {keywords}
-]
-
-iskeyword = frozenset(kwlist).__contains__
-'''.lstrip()
-
-EXTRA_KEYWORDS = ["async", "await"]
-
-
-def main():
-    parser = argparse.ArgumentParser(
-        description="Generate the Lib/keywords.py " "file from the grammar."
-    )
-    parser.add_argument(
-        "grammar", type=str, help="The file with the grammar definition in EBNF format"
-    )
-    parser.add_argument("tokens", type=str, help="The file with the token definitions")
-    parser.add_argument(
-        "keyword_file",
-        type=argparse.FileType("w"),
-        help="The path to write the keyword definitions",
-    )
-    args = parser.parse_args()
-    p = ParserGenerator(args.grammar, args.tokens)
-    grammar = p.make_grammar()
-
-    with args.keyword_file as thefile:
-        all_keywords = sorted(list(grammar.keywords) + EXTRA_KEYWORDS)
-
-        keywords = ",\n    ".join(map(repr, all_keywords))
-        thefile.write(TEMPLATE.format(keywords=keywords))
-
-
-if __name__ == "__main__":
-    main()