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## 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>
874 B
874 B
Deferred annotations
Deferred annotations in stubs always resolve
mod.pyi:
def get_foo() -> Foo: ...
class Foo: ...
from mod import get_foo
reveal_type(get_foo()) # revealed: Foo
Deferred annotations in regular code fail
In (regular) source files, annotations are not deferred. This also tests that imports from
__future__ that are not annotations are ignored.
from __future__ import with_statement as annotations
# error: [unresolved-reference]
def get_foo() -> Foo: ...
class Foo: ...
reveal_type(get_foo()) # revealed: Unknown
Deferred annotations in regular code with __future__.annotations
If __future__.annotations is imported, annotations are deferred.
from __future__ import annotations
def get_foo() -> Foo:
return Foo()
class Foo: ...
reveal_type(get_foo()) # revealed: Foo