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[syntax-errors] Type parameter lists before Python 3.12 (#16479)

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Summary
--

Another simple one, just detect type parameter lists in functions
and classes. Like pyright, we don't emit a second diagnostic for
`type` alias statements, which were also introduced in 3.12.

Test Plan
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Inline tests.
This commit is contained in:
Brent Westbrook
2025-03-05 08:19:09 -05:00
committed by GitHub
parent d94a78a134
commit 81bcdcebd3
10 changed files with 557 additions and 0 deletions
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3
crates/ruff_python_parser/resources/inline/err/class_type_params_py311.py Normal file
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@@ -0,0 +1,3 @@
# parse_options: {"target-version": "3.11"}
class Foo[S: (str, bytes), T: float, *Ts, **P]: ...
class Foo[]: ...

3
crates/ruff_python_parser/resources/inline/err/function_type_params_py311.py Normal file
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@@ -0,0 +1,3 @@
# parse_options: {"target-version": "3.11"}
def foo[T](): ...
def foo[](): ...

2
crates/ruff_python_parser/resources/inline/ok/class_type_params_py312.py Normal file
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@@ -0,0 +1,2 @@
# parse_options: {"target-version": "3.12"}
class Foo[S: (str, bytes), T: float, *Ts, **P]: ...

2
crates/ruff_python_parser/resources/inline/ok/function_type_params_py312.py Normal file
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@@ -0,0 +1,2 @@
# parse_options: {"target-version": "3.12"}
def foo[T](): ...