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[ty] Add subdiagnostic about empty bodies in more cases (#18942)

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Alex Waygood 2025-06-25 20:25:00 +01:00 • committed by GitHub
parent 5d546c600a
commit c77e72ea1a
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2 changed files with 5 additions and 4 deletions
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1
crates/ty_python_semantic/resources/mdtest/snapshots/return_type.md_-_Function_return_type_-_Invalid_return_type_(a91e0c67519cd77f).snap
View file

@ -93,6 +93,7 @@ error[invalid-return-type]: Function always implicitly returns `None`, which is
| ^
|
info: Consider changing the return annotation to `-> None` or adding a `return` statement
info: Only functions in stub files, methods on protocol classes, or methods with `@abstractmethod` are permitted to have empty bodies
info: rule `invalid-return-type` is enabled by default
```

8
crates/ty_python_semantic/src/types/diagnostic.rs
View file

@ -1828,14 +1828,14 @@ pub(super) fn report_implicit_return_type(
if !has_empty_body {
return;
}
diagnostic.info(
"Only functions in stub files, methods on protocol classes, \
or methods with `@abstractmethod` are permitted to have empty bodies",
);
let Some(class) = enclosing_class_of_method else {
return;
};
if class.iter_mro(db, None).contains(&ClassBase::Protocol) {
diagnostic.info(
"Only functions in stub files, methods on protocol classes, \
or methods with `@abstractmethod` are permitted to have empty bodies",
);
diagnostic.info(format_args!(
"Class `{}` has `typing.Protocol` in its MRO, but it is not a protocol class",
class.name(db)