Separate BitXorOr into BitXor and BitOr precedence
#16844
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| And, | ||
| /// Precedence of boolean `not` expressions. | ||
| Not, | ||
| /// Precedence of comparisons (`<`, `<=`, `>`, `>=`, `!=`, `==`), |
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(This comment is really related to the code on lines 11-18, but GitHub won't let me comment on that block of unchanged code)
The None, Yield, and Starred variants don't show up in Python's official list of Operator Precedences. None mostly makes sense to me, as a virtual precedence to represent the absolute lowest value. But I'm curious about why Yield and Starred were placed in their respective spots. Is there any documentation about this? Or context that can be shared?
[This question is more about my understanding than about the logic in this PR, I just thought this was a good place to ask -- please let me know if there's somewhere else I should raise the question!]
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I think it's just an easier way to model the grammar of those expressions in terms of binding power (precedence levels). The Yield and Starred variant don't show up in the precedence table but they're part of the grammar spec (https://docs.python.org/3/reference/grammar.html) because they're implementation details of the parser (refer to yield_expr and star_named_expression grammar rule) and the rules for them would be dependent on the surrounding context.
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dhruvmanila
changed the title
OperatorPrecedence::BitXorOr into BitXor (higher) and BitOr (ruff_python_ast)BitXorOr into BitXor and BitOr precedence
* main: (26 commits) Use the common `OperatorPrecedence` for the parser (#16747) [red-knot] Check subtype relation between callable types (#16804) [red-knot] Check whether two callable types are equivalent (#16698) [red-knot] Ban most `Type::Instance` types in type expressions (#16872) Special-case value-expression inference of special form subscriptions (#16877) [syntax-errors] Fix star annotation before Python 3.11 (#16878) Recognize `SyntaxError:` as an error code for ecosystem checks (#16879) [red-knot] add test cases result in false positive errors (#16856) Bump 0.11.1 (#16871) Allow discovery of venv in VIRTUAL_ENV env variable (#16853) Split git pathspecs in change determination onto separate lines (#16869) Use the correct base commit for change determination (#16857) Separate `BitXorOr` into `BitXor` and `BitOr` precedence (#16844) Server: Allow `FixAll` action in presence of version-specific syntax errors (#16848) [`refurb`] Fix starred expressions fix (`FURB161`) (#16550) [`flake8-executable`] Add pytest and uv run to help message for `shebang-missing-python` (`EXE003`) (#16855) Show more precise messages in invalid type expressions (#16850) [`flake8-executables`] Allow `uv run` in shebang line for `shebang-missing-python` (`EXE003`) (#16849) Add `--exit-non-zero-on-format` (#16009) [red-knot] Ban list literals in most contexts in type expressions (#16847) ...
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Summary
This change follows up on the bug-fix requested in #16747 --
ruff_python_ast::OperatorPrecedencehad an enum variant,BitXorOr, which which gave the same precedence to the|and^operators. This goes against Python's documentation for operator precedence, so this PR changes the code so that it's correct.This is part of the overall effort to unify redundant definitions of
OperatorPrecedencethroughout the codebase (#16071)Test Plan
Because this is an internal change, I only ran existing tests to ensure nothing was broken.