com.google.devtools.build.lib.syntax.compiler.IntegerVariableIncrease.java Source code

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Here is the source code for com.google.devtools.build.lib.syntax.compiler.IntegerVariableIncrease.java

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// Copyright 2015 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.build.lib.syntax.compiler;

import net.bytebuddy.implementation.Implementation.Context;
import net.bytebuddy.implementation.bytecode.StackManipulation;

import org.objectweb.asm.MethodVisitor;

/**
 * A {@link StackManipulation} that increases a given integer variable of the method by a given
 * amount.
 */
public final class IntegerVariableIncrease implements StackManipulation {

    private final Variable variable;
    private final int increment;

    public IntegerVariableIncrease(Variable variable, int increment) {
        this.variable = variable;
        this.increment = increment;
    }

    @Override
    public Size apply(MethodVisitor methodVisitor, Context implementationContext) {
        methodVisitor.visitIincInsn(variable.index, increment);
        return new Size(0, 0);
    }

    @Override
    public boolean isValid() {
        return true;
    }

    @Override
    public String toString() {
        return "IntInc(" + variable.index + ", " + increment + ")";
    }
}