org.jetbrains.kotlin.backend.jvm.intrinsics.IteratorNext.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.intrinsics
import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
import org.jetbrains.kotlin.builtins.StandardNames.COLLECTIONS_PACKAGE_FQ_NAME
import org.jetbrains.kotlin.codegen.AsmUtil
import org.jetbrains.kotlin.fileClasses.internalNameWithoutInnerClasses
import org.jetbrains.kotlin.ir.expressions.IrFunctionAccessExpression
import org.jetbrains.kotlin.name.Name
import org.jetbrains.kotlin.resolve.jvm.AsmTypes
import org.jetbrains.kotlin.resolve.jvm.JvmPrimitiveType
import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature
import org.jetbrains.org.objectweb.asm.Type
object IteratorNext : IntrinsicMethod() {
override fun toCallable(expression: IrFunctionAccessExpression, signature: JvmMethodSignature, context: JvmBackendContext): IrIntrinsicFunction {
// If the array element type is unboxed primitive, do not unbox. Otherwise AsmUtil.unbox throws exception
val type = if (AsmUtil.isBoxedPrimitiveType(signature.returnType)) AsmUtil.unboxType(signature.returnType) else signature.returnType
val newSignature = signature.newReturnType(type)
val primitiveClassName = getKotlinPrimitiveClassName(type)
return IrIntrinsicFunction.create(expression, newSignature, context, getPrimitiveIteratorType(primitiveClassName)) {
it.invokevirtual(
getPrimitiveIteratorType(primitiveClassName).internalName,
"next${primitiveClassName.asString()}",
"()" + type.descriptor,
false
)
}
}
// Type.CHAR_TYPE -> "Char"
private fun getKotlinPrimitiveClassName(type: Type): Name {
return JvmPrimitiveType.get(type.className).primitiveType.typeName
}
// "Char" -> type for kotlin.collections.CharIterator
fun getPrimitiveIteratorType(primitiveClassName: Name): Type {
val iteratorName = Name.identifier(primitiveClassName.asString() + "Iterator")
return Type.getObjectType(COLLECTIONS_PACKAGE_FQ_NAME.child(iteratorName).internalNameWithoutInnerClasses)
}
}