001/*-------------------------------------------------------------------------+
002|                                                                          |
003| Copyright 2005-2011 the ConQAT Project                                   |
004|                                                                          |
005| Licensed under the Apache License, Version 2.0 (the "License");          |
006| you may not use this file except in compliance with the License.         |
007| You may obtain a copy of the License at                                  |
008|                                                                          |
009|    http://www.apache.org/licenses/LICENSE-2.0                            |
010|                                                                          |
011| Unless required by applicable law or agreed to in writing, software      |
012| distributed under the License is distributed on an "AS IS" BASIS,        |
013| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
014| See the License for the specific language governing permissions and      |
015| limitations under the License.                                           |
016+-------------------------------------------------------------------------*/
017package eu.cqse.check.framework.shallowparser.languages.cpp;
018
019import static eu.cqse.check.framework.scanner.ETokenType.LT;
020
021import java.util.List;
022
023import eu.cqse.check.framework.scanner.IToken;
024import eu.cqse.check.framework.shallowparser.framework.ParserState;
025import eu.cqse.check.framework.shallowparser.framework.RecognizerBase;
026import eu.cqse.check.framework.shallowparser.languages.base.EGenericParserStates;
027import eu.cqse.check.framework.util.LanguageFeatureParser;
028
029/**
030 * A recognizer that skips the angle brackets of a template. A simple skip
031 * nested recognizer cannot be used, because of constructs like
032 * "std::vector<SomeType<(1>2)>> x".
033 */
034public class CppSkipTemplateSpecificationRecognizer extends RecognizerBase<EGenericParserStates> {
035
036        /** {@inheritDoc} */
037        @Override
038        protected int matchesLocally(ParserState<EGenericParserStates> parserState, List<IToken> tokens, int startOffset) {
039                // there must be at least two tokens in order to match, namely opening
040                // and closing angle bracket
041                if (startOffset >= tokens.size() - 1 || tokens.get(startOffset).getType() != LT) {
042                        return NO_MATCH;
043                }
044
045                int offset = LanguageFeatureParser.CPP.skipGeneric(tokens, startOffset);
046                if (offset < 0) {
047                        return NO_MATCH;
048                }
049                return offset + 1;
050        }
051}