Support instantiation of annotations with type parameters

By ignoring type parameters. Since type parameters in annotations are a
very limited feature, their sole use is to be able to specify them as
KClass argument: annotation class Foo<T: Any>(val bar: KClass<T>).
Since we can encounter type param only as a KClass type argument (and
never as a property type), simple approach of ignoring them works fine.
In that case, since we simply copy property types to synthetic
implementation class, its properties in IR start look like this:
annotation class FooImpl(override val bar: KClass<T of Foo>). This IR
seems to be not completely correct, since FooImpl.bar type contains T of
Foo param, which is out of its scope. However, so far I didn't
encounter any problems with this during testing and after MR discussion
this approach has been considered possible.

#KT-59558 Fixed
#KT-59036 Fixed
This commit is contained in:
Leonid Startsev
2023-07-13 12:29:36 +02:00
committed by Space Team
parent 8c795462e1
commit 648c1f4599
23 changed files with 322 additions and 7 deletions
@@ -225,7 +225,7 @@ class CallExpressionResolver(
if (functionDescriptor is ConstructorDescriptor) {
val constructedClass = functionDescriptor.constructedClass
if (DescriptorUtils.isAnnotationClass(constructedClass) && !canInstantiateAnnotationClass(callExpression, context.trace)) {
val supported = context.languageVersionSettings.supportsFeature(LanguageFeature.InstantiationOfAnnotationClasses) && constructedClass.declaredTypeParameters.isEmpty()
val supported = context.languageVersionSettings.supportsFeature(LanguageFeature.InstantiationOfAnnotationClasses)
if (!supported) context.trace.report(ANNOTATION_CLASS_CONSTRUCTOR_CALL.on(callExpression))
}
if (DescriptorUtils.isEnumClass(constructedClass)) {