ruff/crates/ty_python_semantic/resources/mdtest/call
Dhruv Manilawala 4ca38b2974
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[ty] Unpack variadic argument type in specialization (#20130)
## Summary

This PR fixes various TODOs around overload call when a variadic
argument is used.

The reason this bug existed is because the specialization wouldn't
account for unpacking the type of the variadic argument.

This is fixed by expanding `MatchedArgument` to contain the type of that
argument _only_ when it is a variadic argument. The reason is that
there's a split for when the argument type is inferred -- the
non-variadic arguments are inferred using `infer_argument_types` _after_
parameter matching while the variadic argument type is inferred _during_
the parameter matching. And, the `MatchedArgument` is populated _during_
parameter matching which means the unpacking would need to happen during
parameter matching.

This split seems a bit inconsistent but I don't want to spend a lot of
time on trying to merge them such that all argument type inference
happens in a single place. I might look into it while adding support for
`**kwargs`.

## Test Plan

Update existing tests by resolving the todos.

The ecosystem changes looks correct to me except for the `slice` call
but it seems that it's unrelated to this PR as we infer `slice[Any, Any,
Any]` for a `slice(1, 2, 3)` call on `main` as well
([playground](https://play.ty.dev/9eacce00-c7d5-4dd5-a932-4265cb2bb4f6)).
2025-08-29 04:27:28 +00:00
..
annotation.md ty_python_semantic: add union type context to function call type errors 2025-05-09 13:40:51 -04:00
builtins.md [ty] Improve isinstance() truthiness analysis for generic types (#19668) 2025-08-01 14:44:22 +01:00
callable_instance.md ty_python_semantic: add union type context to function call type errors 2025-05-09 13:40:51 -04:00
constructor.md [ty] Rename call-possibly-unbound-method to possibly-unbound-implicit-call (#18017) 2025-05-22 15:25:51 +00:00
dunder.md [ty] Allow declared-only class-level attributes to be accessed on the class (#19071) 2025-07-02 18:03:56 +02:00
dunder_import.md [ty] Add special-cased inference for __import__(name) and importlib.import_module(name) (#19008) 2025-06-29 11:49:23 +01:00
function.md [ty] Remove Type::Tuple (#19669) 2025-08-11 22:03:32 +01:00
getattr_static.md [ty] eliminate is_fully_static (#18799) 2025-06-24 18:02:05 -07:00
invalid_syntax.md ty_python_semantic: add union type context to function call type errors 2025-05-09 13:40:51 -04:00
methods.md [ty] Sync vendored typeshed stubs (#19923) 2025-08-14 18:09:35 -07:00
never.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
overloads.md [ty] Unpack variadic argument type in specialization (#20130) 2025-08-29 04:27:28 +00:00
replace.md [ty] synthesize __replace__ for dataclasses (>=3.13) (#19545) 2025-07-29 17:32:01 +02:00
str_startswith.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
subclass_of.md [ty] Include synthesized arguments in displayed counts for too-many-positional-arguments (#18098) 2025-05-14 22:51:23 -04:00
union.md [ty] eliminate is_fully_static (#18799) 2025-06-24 18:02:05 -07:00