Shunsuke Shibayama 78b5f0b165 [red-knot] detect invalid return type (#16540) ...

## Summary

This PR closes #16248.

If the return type of the function isn't assignable to the one
specified, an `invalid-return-type` error occurs.
I thought it would be better to report this as a different kind of error
than the `invalid-assignment` error, so I defined this as a new error.

## Test Plan

All type inconsistencies in the test cases have been replaced with
appropriate ones.

---------

Co-authored-by: Carl Meyer <carl@astral.sh>

2025-03-12 01:58:59 +00:00

..

basic.md_-_Structures_-_Unresolvable_module_import.snap

[red-knot] Merge Markdown code blocks inside a single section (#15950)

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basic.md_-_Structures_-_Unresolvable_submodule_imports.snap

[red-knot] Merge Markdown code blocks inside a single section (#15950)

2025-02-05 22:26:15 +01:00

for.md_-_For_loops_-_`__iter__`_does_not_return_an_iterator.snap

[red-knot] Rewrite Type::try_iterate() to improve type inference and diagnostic messages (#16321)

2025-02-25 14:02:03 +00:00

for.md_-_For_loops_-_`__iter__`_method_with_a_bad_signature.snap

[red-knot] Rewrite Type::try_iterate() to improve type inference and diagnostic messages (#16321)

2025-02-25 14:02:03 +00:00

for.md_-_For_loops_-_`__iter__`_returns_an_iterator_with_an_invalid_`__next__`_method.snap

[red-knot] Rewrite Type::try_iterate() to improve type inference and diagnostic messages (#16321)

2025-02-25 14:02:03 +00:00

for.md_-_For_loops_-_Bad_`__getitem__`_method.snap

[red-knot] Rewrite Type::try_iterate() to improve type inference and diagnostic messages (#16321)

2025-02-25 14:02:03 +00:00

for.md_-_For_loops_-_Invalid_iterable.snap

[red-knot] Rewrite Type::try_iterate() to improve type inference and diagnostic messages (#16321)

2025-02-25 14:02:03 +00:00

for.md_-_For_loops_-_New_over_old_style_iteration_protocol.snap

[red-knot] Rewrite Type::try_iterate() to improve type inference and diagnostic messages (#16321)

2025-02-25 14:02:03 +00:00

for.md_-_For_loops_-_No_`__iter__`_method_and_`__getitem__`_is_not_callable.snap

[red-knot] Rewrite Type::try_iterate() to improve type inference and diagnostic messages (#16321)

2025-02-25 14:02:03 +00:00

for.md_-_For_loops_-_Possibly_invalid_`__getitem__`_methods.snap

[red-knot] detect invalid return type (#16540)

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for.md_-_For_loops_-_Possibly_invalid_`__iter__`_methods.snap

[red-knot] Correct modeling of dunder calls (#16368)

2025-02-25 20:38:15 +01:00

for.md_-_For_loops_-_Possibly_invalid_`__next__`_method.snap

[red-knot] Rewrite Type::try_iterate() to improve type inference and diagnostic messages (#16321)

2025-02-25 14:02:03 +00:00

for.md_-_For_loops_-_Possibly_unbound_`__iter__`_and_bad_`__getitem__`_method.snap

[red-knot] detect invalid return type (#16540)

2025-03-12 01:58:59 +00:00

for.md_-_For_loops_-_Possibly_unbound_`__iter__`_and_possibly_invalid_`__getitem__`.snap

[red-knot] detect invalid return type (#16540)

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for.md_-_For_loops_-_Possibly_unbound_`__iter__`_and_possibly_unbound_`__getitem__`.snap

[red-knot] detect invalid return type (#16540)

2025-03-12 01:58:59 +00:00

for.md_-_For_loops_-_Possibly-not-callable_`__getitem__`_method.snap

[red-knot] Correct modeling of dunder calls (#16368)

2025-02-25 20:38:15 +01:00

for.md_-_For_loops_-_Union_type_as_iterable_where_one_union_element_has_invalid_`__iter__`_method.snap

[red-knot] Rewrite Type::try_iterate() to improve type inference and diagnostic messages (#16321)

2025-02-25 14:02:03 +00:00

for.md_-_For_loops_-_Union_type_as_iterable_where_one_union_element_has_no_`__iter__`_method.snap

[red-knot] Rewrite Type::try_iterate() to improve type inference and diagnostic messages (#16321)

2025-02-25 14:02:03 +00:00

for.md_-_For_loops_-_With_non-callable_iterator.snap

[red-knot] Rewrite Type::try_iterate() to improve type inference and diagnostic messages (#16321)

2025-02-25 14:02:03 +00:00

instances.md_-_Binary_operations_on_instances_-_Operations_involving_types_with_invalid_`__bool__`_methods.snap

[red-knot] Diagnostics for incorrect bool usages (#16238)

2025-02-21 19:26:05 +01:00

invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Basic.snap

red_knot_python_semantic: improve diagnostic message for "invalid argument type"

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invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Calls_to_methods.snap

[red-knot] Better diagnostics for method calls (#16362)

2025-02-25 09:58:08 +01:00

invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Different_files.snap

red_knot_python_semantic: improve diagnostic message for "invalid argument type"

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invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Different_source_order.snap

red_knot_python_semantic: improve diagnostic message for "invalid argument type"

2025-02-19 08:24:19 -05:00

invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Many_parameters_across_multiple_lines.snap

red_knot_python_semantic: improve diagnostic message for "invalid argument type"

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invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Many_parameters_with_multiple_invalid_arguments.snap

red_knot_python_semantic: improve diagnostic message for "invalid argument type"

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invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Many_parameters.snap

red_knot_python_semantic: improve diagnostic message for "invalid argument type"

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invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Test_calling_a_function_whose_type_is_vendored_from_`typeshed`.snap

red_knot_python_semantic: improve diagnostic message for "invalid argument type"

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invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Tests_for_a_variety_of_argument_types_-_Keyword_only_arguments.snap

red_knot_python_semantic: improve diagnostic message for "invalid argument type"

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invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Tests_for_a_variety_of_argument_types_-_Mix_of_arguments.snap

red_knot_python_semantic: improve diagnostic message for "invalid argument type"

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invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Tests_for_a_variety_of_argument_types_-_One_keyword_argument.snap

red_knot_python_semantic: improve diagnostic message for "invalid argument type"

2025-02-19 08:24:19 -05:00

invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Tests_for_a_variety_of_argument_types_-_Only_positional.snap

red_knot_python_semantic: improve diagnostic message for "invalid argument type"

2025-02-19 08:24:19 -05:00

invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Tests_for_a_variety_of_argument_types_-_Synthetic_arguments.snap

[red-knot] Correct modeling of dunder calls (#16368)

2025-02-25 20:38:15 +01:00

invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Tests_for_a_variety_of_argument_types_-_Variadic_arguments.snap

red_knot_python_semantic: improve diagnostic message for "invalid argument type"

2025-02-19 08:24:19 -05:00

invalid_argument_type.md_-_Invalid_argument_type_diagnostics_-_Tests_for_a_variety_of_argument_types_-_Variadic_keyword_arguments.snap

red_knot_python_semantic: improve diagnostic message for "invalid argument type"

2025-02-19 08:24:19 -05:00

membership_test.md_-_Comparison___Membership_Test_-_Return_type_that_doesn't_implement_`__bool__`_correctly.snap

[red-knot] Diagnostics for incorrect bool usages (#16238)

2025-02-21 19:26:05 +01:00

no_matching_overload.md_-_No_matching_overload_diagnostics_-_Calls_to_overloaded_functions.snap

[red-knot] Support multiple overloads when binding parameters at call sites (#16568)

2025-03-11 15:08:17 -04:00

not.md_-_Unary_not_-_Object_that_implements_`__bool__`_incorrectly.snap

[red-knot] Diagnostics for incorrect bool usages (#16238)

2025-02-21 19:26:05 +01:00

return_type.md_-_Function_return_type_-_Invalid_conditional_return_type.snap

[red-knot] detect invalid return type (#16540)

2025-03-12 01:58:59 +00:00

return_type.md_-_Function_return_type_-_Invalid_implicit_return_type.snap

[red-knot] detect invalid return type (#16540)

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return_type.md_-_Function_return_type_-_Invalid_return_type_in_stub_file.snap

[red-knot] detect invalid return type (#16540)

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return_type.md_-_Function_return_type_-_Invalid_return_type.snap

[red-knot] detect invalid return type (#16540)

2025-03-12 01:58:59 +00:00

rich_comparison.md_-_Comparison___Rich_Comparison_-_Chained_comparisons_with_objects_that_don't_implement_`__bool__`_correctly.snap

[red-knot] Diagnostics for incorrect bool usages (#16238)

2025-02-21 19:26:05 +01:00

tuples.md_-_Comparison___Tuples_-_Chained_comparisons_with_elements_that_incorrectly_implement_`__bool__`.snap

[red-knot] Diagnostics for incorrect bool usages (#16238)

2025-02-21 19:26:05 +01:00

tuples.md_-_Comparison___Tuples_-_Equality_with_elements_that_incorrectly_implement_`__bool__`.snap

[red-knot] Diagnostics for incorrect bool usages (#16238)

2025-02-21 19:26:05 +01:00

unpacking.md_-_Unpacking_-_Right_hand_side_not_iterable.snap

[red-knot] Rewrite Type::try_iterate() to improve type inference and diagnostic messages (#16321)

2025-02-25 14:02:03 +00:00

unpacking.md_-_Unpacking_-_Too_few_values_to_unpack.snap

[red-knot] Fix diagnostic range for non-iterable unpacking assignments (#15994)

2025-02-06 15:36:22 +01:00

unpacking.md_-_Unpacking_-_Too_many_values_to_unpack.snap

[red-knot] Fix diagnostic range for non-iterable unpacking assignments (#15994)

2025-02-06 15:36:22 +01:00

unresolved_import.md_-_Unresolved_import_diagnostics_-_An_unresolvable_import_that_does_not_use_`from`.snap

[red-knot] Merge Markdown code blocks inside a single section (#15950)

2025-02-05 22:26:15 +01:00

unresolved_import.md_-_Unresolved_import_diagnostics_-_Using_`from`_with_a_resolvable_module_but_unresolvable_item.snap

[red-knot] Merge Markdown code blocks inside a single section (#15950)

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unresolved_import.md_-_Unresolved_import_diagnostics_-_Using_`from`_with_an_unknown_current_module.snap

[red-knot] Merge Markdown code blocks inside a single section (#15950)

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unresolved_import.md_-_Unresolved_import_diagnostics_-_Using_`from`_with_an_unknown_nested_module.snap

[red-knot] Merge Markdown code blocks inside a single section (#15950)

2025-02-05 22:26:15 +01:00

unresolved_import.md_-_Unresolved_import_diagnostics_-_Using_`from`_with_an_unresolvable_module.snap

[red-knot] Merge Markdown code blocks inside a single section (#15950)

2025-02-05 22:26:15 +01:00

unresolved_import.md_-_Unresolved_import_diagnostics_-_Using_`from`_with_too_many_leading_dots.snap

[red-knot] fix unresolvable import range (#15976)

2025-02-05 14:01:58 -05:00