org.jetbrains.kotlin.ir.util.IrTypeParameterRemapper.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package org.jetbrains.kotlin.ir.util
import org.jetbrains.kotlin.ir.declarations.IrTypeParameter
import org.jetbrains.kotlin.ir.declarations.IrTypeParametersContainer
import org.jetbrains.kotlin.ir.symbols.IrClassifierSymbol
import org.jetbrains.kotlin.ir.types.*
import org.jetbrains.kotlin.ir.types.impl.IrSimpleTypeImpl
import org.jetbrains.kotlin.ir.types.impl.IrTypeAbbreviationImpl
import org.jetbrains.kotlin.ir.types.impl.makeTypeProjection
/* After moving an IrElement, some type parameter references within it may become out of scope.
This remapper restores validity by redirecting those references to new type parameters.
*/
class IrTypeParameterRemapper(
val typeParameterMap: Map
) : TypeRemapper {
override fun enterScope(irTypeParametersContainer: IrTypeParametersContainer) {}
override fun leaveScope() {}
override fun remapType(type: IrType): IrType =
if (type !is IrSimpleType)
type
else
IrSimpleTypeImpl(
null,
type.classifier.remap(),
type.hasQuestionMark,
type.arguments.map { it.remap() },
type.annotations,
type.abbreviation?.remap()
).apply {
annotations.forEach { it.remapTypes(this@IrTypeParameterRemapper) }
}
private fun IrClassifierSymbol.remap() =
(owner as? IrTypeParameter)?.let { typeParameterMap[it]?.symbol }
?: this
private fun IrTypeArgument.remap() =
if (this is IrTypeProjection)
makeTypeProjection(remapType(type), variance)
else
this
private fun IrTypeAbbreviation.remap() =
IrTypeAbbreviationImpl(
typeAlias,
hasQuestionMark,
arguments.map { it.remap() },
annotations
).apply {
annotations.forEach { it.remapTypes(this@IrTypeParameterRemapper) }
}
}