org.jetbrains.kotlin.cfg.pseudocode.instructions.InstructionImpl.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2015 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.cfg.pseudocode.instructions
import java.util.Collections
import java.util.LinkedHashSet
import org.jetbrains.kotlin.cfg.pseudocode.Pseudocode
import org.jetbrains.kotlin.cfg.pseudocode.PseudoValue
abstract class InstructionImpl(override val lexicalScope: LexicalScope): Instruction {
private var _owner: Pseudocode? = null
override var owner: Pseudocode
get() = _owner!!
set(value: Pseudocode) {
assert(_owner == null || _owner == value)
_owner = value
}
private var allCopies: MutableSet? = null
override val copies: Collection
get() = allCopies?.filter { it != this } ?: Collections.emptyList()
fun copy(): Instruction = updateCopyInfo(createCopy())
protected abstract fun createCopy(): InstructionImpl
protected fun updateCopyInfo(instruction: InstructionImpl): Instruction {
if (allCopies == null) {
allCopies = hashSetOf(this)
}
instruction.allCopies = allCopies
allCopies!!.add(instruction)
return instruction
}
var markedAsDead: Boolean = false
override val dead: Boolean get() = allCopies?.all { it.markedAsDead } ?: markedAsDead
override val previousInstructions: MutableCollection = LinkedHashSet()
protected fun outgoingEdgeTo(target: Instruction?): Instruction? {
(target as InstructionImpl?)?.previousInstructions?.add(this)
return target
}
override val inputValues: List = Collections.emptyList()
}