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Preserve typing args when inspecting custom types #687

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Preserve typing args when inspecting custom types #687

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2 changes: 1 addition & 1 deletion msgspec/inspect.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1002,4 +1002,4 @@ def _translate_inner(
)
return out
else:
return CustomType(t)
return CustomType(t[args] if args else t)
7 changes: 7 additions & 0 deletions tests/test_inspect.py
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Original file line number Diff line number Diff line change
Expand Up @@ -245,6 +245,13 @@ def test_custom():
assert mi.type_info(complex) == mi.CustomType(complex)


def test_custom_with_args():
class MyGeneric(Generic[T]):
value: T

assert mi.type_info(MyGeneric[int]) == mi.CustomType(MyGeneric[int])


@pytest.mark.parametrize(
"kw",
[{}, dict(min_length=0), dict(max_length=3)],
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