org.jetbrains.kotlin.codegen.range.BoundedValue.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2017 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.codegen.range
import org.jetbrains.kotlin.codegen.AsmUtil
import org.jetbrains.kotlin.codegen.StackValue
import org.jetbrains.org.objectweb.asm.Type
import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter
/**
* Low level abstraction for bounded range that is used to generate contains checks and for loops.
*/
class BoundedValue(
val lowBound: StackValue,
val isLowInclusive: Boolean = true,
val highBound: StackValue,
val isHighInclusive: Boolean = true
) {
// It is necessary to maintain the proper evaluation order as of Kotlin 1.0 and 1.1
// to evaluate range bounds left to right and put them on stack as 'high; low'.
fun putHighLow(v: InstructionAdapter, type: Type) {
if (!lowBound.canHaveSideEffects() || !highBound.canHaveSideEffects()) {
highBound.put(type, v)
lowBound.put(type, v)
} else {
lowBound.put(type, v)
highBound.put(type, v)
AsmUtil.swap(v, type, type)
}
}
}