[syntax-errors] Parenthesized keyword argument names after Python 3.8 #16482
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Summary -- Unlike the other syntax errors detected so far, parenthesized keyword arguments are only allowed *before* 3.8. It sounds like they were only accidentally allowed before that [^1]. I wanted to mark the whole parenthesized range instead of just the kwarg name, so I moved the `ParsedExpr::is_parenthesized` bool to an `Option<TextRange>` and replaced it with an `is_parenthesized` method. Test Plan -- Inline tests. [^1]: python/cpython#78822
ntBre
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MichaReiser
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Mar 4, 2025
dhruvmanila
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Mar 4, 2025
MichaReiser
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Mar 5, 2025
dhruvmanila
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Mar 5, 2025
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MichaReiser
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I still slightly prefer to not store the parenthesized range to make this PR smaller and avoid storing information that can be retrieved from the parser already but I'm happy to go with what you / @dhruvmanila think is best
dhruvmanila
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Nice.
As suggested #16482 (comment), I'd get the argument range locally using node_range and use that instead.
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Mar 6, 2025
crates/ruff_python_parser/resources/inline/err/parenthesized_kwarg_py38.py
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Summary
Unlike the other syntax errors detected so far, parenthesized keyword arguments are only allowed before 3.8. It sounds like they were only accidentally allowed before that 1.
As an aside, you get a pretty confusing error from Python for this, so it's nice that we can catch it:
Test Plan
Inline tests.
Footnotes
https://github.com/python/cpython/issues/78822 ↩