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| author | Pablo Galindo Salgado <Pablogsal@gmail.com> | 2023-10-02 15:22:07 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-10-02 15:22:07 (GMT) |
| commit | f6cb2e48152fc7b44d55583ad8b80b653085bae2 (patch) | |
| tree | 69b634818ebd0a76d8ccde5c6a9db3b02eb09625 /Tools/peg_generator | |
| parent | c7cbd82e62d22b6b1c6d4e95dbbd1db16c321533 (diff) | |
| download | cpython-f6cb2e48152fc7b44d55583ad8b80b653085bae2.zip cpython-f6cb2e48152fc7b44d55583ad8b80b653085bae2.tar.gz cpython-f6cb2e48152fc7b44d55583ad8b80b653085bae2.tar.bz2 | |
[3.12] gh-109596: Ensure repeated rules in the grammar are not allowed and fix incorrect soft keywords (GH-109606). (#109752)
(cherry picked from commit b28ffaa193efc66f46ab90d383279174a11a11d7)
Diffstat (limited to 'Tools/peg_generator')
| -rw-r--r-- | Tools/peg_generator/pegen/grammar.py | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/Tools/peg_generator/pegen/grammar.py b/Tools/peg_generator/pegen/grammar.py index 03d60d0..a6c19bc 100644 --- a/Tools/peg_generator/pegen/grammar.py +++ b/Tools/peg_generator/pegen/grammar.py @@ -35,7 +35,13 @@ class GrammarVisitor: class Grammar: def __init__(self, rules: Iterable[Rule], metas: Iterable[Tuple[str, Optional[str]]]): - self.rules = {rule.name: rule for rule in rules} + # Check if there are repeated rules in "rules" + all_rules = {} + for rule in rules: + if rule.name in all_rules: + raise GrammarError(f"Repeated rule {rule.name!r}") + all_rules[rule.name] = rule + self.rules = all_rules self.metas = dict(metas) def __str__(self) -> str: |