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[syntax-error] Default type parameter followed by non-default type parameter (#21657)

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## Summary

This PR implements syntax error where a default type parameter is
followed by a non-default type parameter.
https://github.com/astral-sh/ruff/issues/17412#issuecomment-3584088217


## Test Plan

I have written inline tests as directed in #17412

---------

Signed-off-by: 11happy <bhuminjaysoni@gmail.com>
Signed-off-by: 11happy <soni5happy@gmail.com>
This commit is contained in:
Bhuminjay Soni
2025-12-03 12:01:31 +05:30
committed by GitHub
parent abaa49f552
commit f68080b55e
7 changed files with 359 additions and 5 deletions
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crates/ruff_python_parser/resources/inline/err/type_parameter_default_order.py Normal file
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@@ -0,0 +1,3 @@
class C[T = int, U]: ...
class C[T1, T2 = int, T3, T4]: ...
type Alias[T = int, U] = ...