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
019public class FirstBefore extends AbstractTokenStreamPattern {
020    private final TokenStreamPredicate lookFor;
021    private final TokenStreamPredicate stopAt;
022
023    public FirstBefore(TokenStreamPredicate lookFor, TokenStreamPredicate stopAt) {
024        this.lookFor = lookFor;
025        this.stopAt = stopAt;
026    }
027
028    @Override
029    public boolean processToken(int offset, boolean topLevel) {
030        if (lookFor.matching(topLevel)) {
031            lastOccurrence = offset;
032            return true;
033        }
034        if (stopAt.matching(topLevel)) {
035            return true;
036        }
037        return false;
038    }
039}