com.google.javascript.jscomp.fuzzing.Scope.java Source code

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Here is the source code for com.google.javascript.jscomp.fuzzing.Scope.java

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/*
 * Copyright 2013 The Closure Compiler Authors.
 *
 * 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.javascript.jscomp.fuzzing;

import com.google.common.base.Preconditions;

import java.util.ArrayList;
import java.util.Random;

/**
 * Data structure for holding information in each scope
 */
class Scope {
    ArrayList<Symbol> symbols = new ArrayList<>();
    int loopNesting = 0;
    int switchNesting = 0;
    ArrayList<String> loopLabels = new ArrayList<>();
    ArrayList<String> otherLabels = new ArrayList<>();

    String randomLabelForContinue(Random random) {
        Preconditions.checkState(!loopLabels.isEmpty());
        return loopLabels.get(random.nextInt(loopLabels.size()));
    }

    String randomLabelForBreak(Random random) {
        Preconditions.checkState(loopLabels.size() + otherLabels.size() > 0);
        int rand = random.nextInt(loopLabels.size() + otherLabels.size());
        if (rand < loopLabels.size()) {
            return loopLabels.get(rand);
        } else {
            return otherLabels.get(rand - loopLabels.size());
        }
    }
}