org.jetbrains.kotlin.backend.jvm.lower.TypeAliasAnnotationMethodsLowering.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.backend.jvm.lower
import org.jetbrains.kotlin.backend.common.ClassLoweringPass
import org.jetbrains.kotlin.backend.common.CommonBackendContext
import org.jetbrains.kotlin.backend.common.phaser.makeIrFilePhase
import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
import org.jetbrains.kotlin.descriptors.Modality
import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
import org.jetbrains.kotlin.ir.builders.declarations.addFunction
import org.jetbrains.kotlin.ir.declarations.IrClass
import org.jetbrains.kotlin.ir.declarations.IrTypeAlias
import org.jetbrains.kotlin.ir.expressions.impl.IrBlockBodyImpl
import org.jetbrains.kotlin.load.java.JvmAbi
import org.jetbrains.kotlin.name.Name
internal val typeAliasAnnotationMethodsPhase = makeIrFilePhase(
::TypeAliasAnnotationMethodsLowering,
name = "TypeAliasAnnotationMethodsLowering",
description = "Generate method stubs for type alias annotations"
)
class TypeAliasAnnotationMethodsLowering(val context: CommonBackendContext) :
ClassLoweringPass {
override fun lower(irClass: IrClass) {
irClass.visitTypeAliases()
}
private val IrTypeAlias.syntheticAnnotationMethodName
get() = Name.identifier(JvmAbi.getSyntheticMethodNameForAnnotatedTypeAlias(name))
private fun IrClass.visitTypeAliases() {
val annotatedAliases = declarations
.filterIsInstance()
.filter { it.annotations.isNotEmpty() }
for (alias in annotatedAliases) {
addFunction {
name = alias.syntheticAnnotationMethodName
visibility = alias.visibility
returnType = context.irBuiltIns.unitType
modality = Modality.OPEN
origin = JvmLoweredDeclarationOrigin.SYNTHETIC_METHOD_FOR_TYPEALIAS_ANNOTATIONS
}.apply {
body = IrBlockBodyImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET)
annotations += alias.annotations
}
}
}
}