001/*
002 * Copyright 2010-2013 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.jetbrains.jet.lang.parsing;
018
019import com.intellij.psi.tree.IElementType;
020
021public abstract class AbstractTokenStreamPattern implements TokenStreamPattern {
022
023    protected int lastOccurrence = -1;
024
025    protected void fail() {
026        lastOccurrence = -1;
027    }
028
029    @Override
030    public int result() {
031        return lastOccurrence;
032    }
033
034    @Override
035    public boolean isTopLevel(int openAngleBrackets, int openBrackets, int openBraces, int openParentheses) {
036        return openBraces == 0 && openBrackets == 0 && openParentheses == 0 && openAngleBrackets == 0;
037    }
038
039    @Override
040    public boolean handleUnmatchedClosing(IElementType token) {
041        return false;
042    }
043}
044