[ty] dataclasses: Allow using dataclasses.dataclass as a function. #18440
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* main: [ty] Add tests for empty list/tuple unpacking (astral-sh#18451) [ty] Argument type expansion for overload call evaluation (astral-sh#18382) [ty] Minor cleanup for `site-packages` discovery logic (astral-sh#18446) [ty] Add generic inference for dataclasses (astral-sh#18443) [ty] dataclasses: Allow using dataclasses.dataclass as a function. (astral-sh#18440) [ty] Create separate `FunctionLiteral` and `FunctionType` types (astral-sh#18360) [ty] Infer `list[T]` when unpacking non-tuple type (astral-sh#18438) [ty] Meta-type of type variables should be type[..] (astral-sh#18439) [`pyupgrade`] Make fix unsafe if it deletes comments (`UP050`) (astral-sh#18390) [`pyupgrade`] Make fix unsafe if it deletes comments (`UP004`) (astral-sh#18393) [ty] Support using legacy typing aliases for generic classes in type annotations (astral-sh#18404) Use ty's completions in playground (astral-sh#18425) Update editor setup docs about Neovim and Vim (astral-sh#18324) Update NPM Development dependencies (astral-sh#18423)
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Summary
Part of astral-sh/ty#111
Using
dataclassas a function, instead of as a decorator did not work as expected prior to this.Fix that by modifying the dataclass overload's return type.
Test Plan
New mdtests, fixing the existing TODO.