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Add comments to clarify JVM type substitution for invoke methods

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This commit is contained in:
Tamas Vajk
2022-03-22 08:58:16 +01:00
committed by Ian Lynagh
parent 1317d2d578
commit 8c50e857e4
1 changed files with 5 additions and 0 deletions
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5
java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt
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@@ -1151,6 +1151,8 @@ open class KotlinFileExtractor(
if (drType != null && extractClassTypeArguments && drType is IrSimpleType && !isUnspecialised(drType)) {
val extractionMethod = if (isFunctionInvoke) {
// For `kotlin.FunctionX` and `kotlin.reflect.KFunctionX` interfaces, we're making sure that we
// extract the call to the `invoke` method that does exist, `kotlin.jvm.functions.FunctionX::invoke`.
val interfaceType = getFunctionalInterfaceTypeWithTypeArgs(drType.arguments).classOrNull!!.owner
val substituted = getJavaEquivalentClass(interfaceType) ?: interfaceType
findFunction(substituted, OperatorNameConventions.INVOKE.asString())!!
@@ -1159,6 +1161,9 @@ open class KotlinFileExtractor(
}
if (isBigArityFunctionInvoke) {
// Big arity `invoke` methods have a special implementation on JVM, they are transformed to a call to
// `kotlin.jvm.functions.FunctionN<out R>::invoke(vararg args: Any?)`, so we only need to pass the type
// argument for the return type. Additionally, the arguments are extracted inside an array literal below.
useFunction<DbCallable>(extractionMethod, listOf(drType.arguments.last()))
} else {
useFunction<DbCallable>(extractionMethod, getDeclaringTypeArguments(callTarget, drType))