/*
 * 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.eval

import org.jetbrains.kotlin.psi.KtExpression
import org.jetbrains.kotlin.cfg.pseudocode.instructions.InstructionWithNext
import org.jetbrains.kotlin.cfg.pseudocode.instructions.InstructionVisitor
import org.jetbrains.kotlin.cfg.pseudocode.instructions.BlockScope
import org.jetbrains.kotlin.cfg.pseudocode.instructions.InstructionImpl
import org.jetbrains.kotlin.cfg.pseudocode.instructions.InstructionVisitorWithResult

class LoadUnitValueInstruction(
    expression: KtExpression,
    blockScope: BlockScope
) : InstructionWithNext(expression, blockScope) {
    override fun accept(visitor: InstructionVisitor) {
        visitor.visitLoadUnitValue(this)
    }

    override fun <R> accept(visitor: InstructionVisitorWithResult<R>): R {
        return visitor.visitLoadUnitValue(this)
    }

    override fun toString(): String =
        "read (Unit)"

    override fun createCopy(): InstructionImpl =
        LoadUnitValueInstruction(element as KtExpression, blockScope)
}
