Support RestrictTo in type aliases [320544977]

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Feature Request

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Description

da...@google.com

created issue #1

Jan 16, 2024 10:45PM

Could we please support @RestrictTo targeting type aliases?

I would like to do:

@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
actual typealias BundledSQLiteStatement =
    androidx.sqlite.driver.NativeSQLiteStatement

but can't right because AnnotationTarget.TYPEALIAS is not one of the annotation targets of @RestricTo.

Ideally I would just make the typealias internal but can't right now due to being an actual / expect class, see https://youtrack.jetbrains.com/issue/KT-37316.

Comments

al...@google.com <al...@google.com> Jan 17, 2024 02:32PM

Reassigned to tn...@google.com.

tn...@google.com <tn...@google.com> #2Jan 17, 2024 03:33PM

I think this basically requires us to solve type use annotations -- this is basically annotating a type. You could use that annotated type inside another type (List<BundledSQLiteStatement>>) etc.

da...@google.com <da...@google.com> #3Feb 16, 2024 08:16PM

I ran into this issue again, this time the IDE is warning me that the 'actual' declaration is missing the @RestricTo annotation the 'expect' declaration has, but I can't add it. :'(

Message last modified on Feb 16, 2024 08:17PM

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ja...@gmail.com <ja...@gmail.com> #4Dec 6, 2024 03:07PM

Hello. Is there any news on this - is it not a case of adding AnnotationTarget.TYPEALIAS?

ju...@google.com <ju...@google.com> #5Feb 25, 2025 11:49PM

Isn't comment #2 sort of true for usages of the annotation on classes as well? If you have @RestrictTo class Foo, wouldn't we want to prevent usage of List<Foo> from outside the restricted scope? I'm guessing the lint check only does that indirectly by preventing Foo's constructor from being called.

mg...@google.com <mg...@google.com> #6Feb 27, 2025 03:26PM

We need RestrictTo support for typealias to migrate lifecycle.common to KotlinTarget 2. See b/397736115#comment2 for details.

Message last modified on Feb 27, 2025 03:38PM

Issue 320544977