f39370a6f5
Implement proper handling for calling intersection types. Previously, calling an intersection type would return a `@Todo` type that suppressed errors but provided no useful type information. Now, when calling an intersection type: - We try to call each positive element with the given arguments - Elements where the call fails (wrong arguments, not callable, etc.) are discarded - If at least one element succeeds, the call is valid - The return type is the intersection of return types from successful elements - If all elements fail, an appropriate error is reported This approach means that if an intersection contains both a callable with a known signature and a `Top[Callable[..., object]]` (from narrowing by `callable()`), the call will succeed using the element with the known signature, avoiding spurious `call-top-callable` errors. Fixes https://github.com/astral-sh/ty/issues/1858
Markdown files within the mdtest/ subdirectory are tests of type inference and type checking;
executed by the tests/mdtest.rs integration test.
See crates/ty_test/README.md for documentation of this test format.