org.jetbrains.kotlin.backend.jvm.lower.ObjectClassLowering.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2016 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.backend.jvm.lower
import org.jetbrains.kotlin.backend.common.ClassLoweringPass
import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
import org.jetbrains.kotlin.backend.jvm.JvmLoweredDeclarationOrigin
import org.jetbrains.kotlin.descriptors.ClassKind
import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
import org.jetbrains.kotlin.ir.declarations.IrClass
import org.jetbrains.kotlin.ir.declarations.impl.IrFieldImpl
import org.jetbrains.kotlin.ir.expressions.impl.IrCallImpl
import org.jetbrains.kotlin.ir.expressions.impl.IrExpressionBodyImpl
class ObjectClassLowering(val context: JvmBackendContext) : ClassLoweringPass {
override fun lower(irClass: IrClass) {
if (irClass.descriptor.kind != ClassKind.OBJECT) return
val instanceFieldDescriptor = context.specialDescriptorsFactory.getFieldDescriptorForObjectInstance(irClass.descriptor)
val constructor = irClass.descriptor.unsubstitutedPrimaryConstructor ?:
throw AssertionError("Object should have a primary constructor: ${irClass.descriptor}")
val instanceInitializer = IrCallImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, constructor)
val instanceField = IrFieldImpl(
UNDEFINED_OFFSET, UNDEFINED_OFFSET, JvmLoweredDeclarationOrigin.FIELD_FOR_OBJECT_INSTANCE,
instanceFieldDescriptor,
IrExpressionBodyImpl(UNDEFINED_OFFSET, UNDEFINED_OFFSET, instanceInitializer)
)
irClass.declarations.add(instanceField)
}
}