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Fir2Ir, JVM IR: support flexible Array types loaded from Java

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We don't have true flexible types in the IR, but we approximate it with
internal type annotations, such as FlexibleNullability,
FlexibleMutability, RawType. These annotations are then handled
specially in JvmIrTypeSystemContext, which can construct a fake flexible
type so that type checker on IR types would behave exactly as on
frontend types.

As shown in KT-63441, one instance of flexible types where flexibility
was lost during conversion to IR is Java array/vararg types. It's
necessary to support it so that IR fake overrides could be constructed
correctly, because IR fake override checker requires parameter types to
be equal. So this change introduces another internal type annotation,
FlexibleArrayElementVariance, which is only applicable to types with
classifier kotlin/Array, and which signifies that the annotated type
`Array<X>` should rather be seen as `Array<X>..Array<out X>`.

 #KT-63441 Fixed
 #KT-63446 Fixed
This commit is contained in:
Alexander Udalov
2023-11-24 16:34:49 +01:00
committed by Space Team
parent e98902ce74
commit ee8d42532b
35 changed files with 571 additions and 48 deletions
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compiler/testData/codegen/box/annotations/javaTargetOnPrimaryCtorParameter.fir.ir.txt
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+2 -2
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@@ -88,8 +88,8 @@ FILE fqName:<root> fileName:/test.kt
$receiver: CALL 'public final fun map <T, R> (transform: kotlin.Function1<T of kotlin.collections.map, R of kotlin.collections.map>): kotlin.collections.List<R of kotlin.collections.map> declared in kotlin.collections' type=kotlin.collections.List<kotlin.String> origin=null
<T>: @[FlexibleNullability] kotlin.Annotation?
<R>: kotlin.String
$receiver: TYPE_OP type=kotlin.Array<out @[FlexibleNullability] kotlin.Annotation?> origin=IMPLICIT_NOTNULL typeOperand=kotlin.Array<out @[FlexibleNullability] kotlin.Annotation?>
CALL 'public open fun getAnnotations (): @[FlexibleNullability] kotlin.Array<out @[FlexibleNullability] kotlin.Annotation?>? declared in java.lang.reflect.Field' type=@[FlexibleNullability] kotlin.Array<out @[FlexibleNullability] kotlin.Annotation?>? origin=GET_PROPERTY
$receiver: TYPE_OP type=@[FlexibleArrayElementVariance] kotlin.Array<out @[FlexibleNullability] kotlin.Annotation?> origin=IMPLICIT_NOTNULL typeOperand=@[FlexibleArrayElementVariance] kotlin.Array<out @[FlexibleNullability] kotlin.Annotation?>
CALL 'public open fun getAnnotations (): @[FlexibleNullability] @[FlexibleArrayElementVariance] kotlin.Array<out @[FlexibleNullability] kotlin.Annotation?>? declared in java.lang.reflect.Field' type=@[FlexibleNullability] @[FlexibleArrayElementVariance] kotlin.Array<out @[FlexibleNullability] kotlin.Annotation?>? origin=GET_PROPERTY
$this: CALL 'public open fun getDeclaredField (p0: @[FlexibleNullability] kotlin.String?): @[FlexibleNullability] java.lang.reflect.Field? declared in java.lang.Class' type=@[FlexibleNullability] java.lang.reflect.Field? origin=null
$this: CALL 'public final fun <get-java> <T> (): java.lang.Class<T of kotlin.jvm.<get-java>> declared in kotlin.jvm' type=java.lang.Class<<root>.Foo> origin=GET_PROPERTY
<T>: <root>.Foo