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[ty] Fix error message for invalidly providing type arguments to NamedTuple when it occurs in a type expression (#19940)

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Alex Waygood 2025-08-16 18:45:15 +01:00 • committed by GitHub
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crates/ty_python_semantic/resources/mdtest/named_tuple.md
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@ -312,6 +312,9 @@ def expects_named_tuple(x: typing.NamedTuple):
def _(y: type[typing.NamedTuple]):
reveal_type(y) # revealed: @Todo(unsupported type[X] special form)
# error: [invalid-type-form] "Special form `typing.NamedTuple` expected no type parameter"
def _(z: typing.NamedTuple[int]): ...
```
Any instance of a `NamedTuple` class can therefore be passed for a function parameter that is