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[parser] Flag single unparenthesized generator expr with trailing comma in arguments. (#17893)

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Fixes #17867

## Summary

The CPython parser does not allow generator expressions which are the
sole arguments in an argument list to have a trailing comma.
With this change, we start flagging such instances.

## Test Plan

Added new inline tests.
This commit is contained in:
Abhijeet Prasad Bodas 2025-05-07 23:41:35 +05:30 • committed by GitHub
parent 895b6161a6
commit f5096f2050
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6 changed files with 426 additions and 124 deletions
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1
crates/ruff_python_parser/resources/inline/err/args_unparenthesized_generator.py
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@ -1,2 +1,3 @@
sum(x for x in range(10), 5)
total(1, 2, x for x in range(5), 6)
sum(x for x in range(10),)

2
crates/ruff_python_parser/resources/inline/ok/args_unparenthesized_generator.py
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@ -1 +1,3 @@
zip((x for x in range(10)), (y for y in range(10)))
sum(x for x in range(10))
sum((x for x in range(10)),)