org.antlr.v4.runtime.atn.SetTransition.java Source code

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Here is the source code for org.antlr.v4.runtime.atn.SetTransition.java

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/*
 * Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
 * Use of this file is governed by the BSD 3-clause license that
 * can be found in the LICENSE.txt file in the project root.
 */

package org.antlr.v4.runtime.atn;

import org.antlr.v4.runtime.Token;
import org.antlr.v4.runtime.misc.IntervalSet;

/** A transition containing a set of values. */
public class SetTransition extends Transition {
    public final IntervalSet set;

    // TODO (sam): should we really allow null here?
    public SetTransition(ATNState target, IntervalSet set) {
        super(target);
        if (set == null)
            set = IntervalSet.of(Token.INVALID_TYPE);
        this.set = set;
    }

    @Override
    public int getSerializationType() {
        return SET;
    }

    @Override

    public IntervalSet label() {
        return set;
    }

    @Override
    public boolean matches(int symbol, int minVocabSymbol, int maxVocabSymbol) {
        return set.contains(symbol);
    }

    @Override

    public String toString() {
        return set.toString();
    }
}