65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
// Copyright (C) 2011, 2012 Strahinja Val Markovic <val@markovic.io>
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//
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// This file is part of YouCompleteMe.
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//
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// YouCompleteMe is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// YouCompleteMe is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with YouCompleteMe. If not, see <http://www.gnu.org/licenses/>.
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#include "IdentifierUtils.h"
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#include "standard.h"
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#include <boost/regex.hpp>
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#include <boost/algorithm/string/regex.hpp>
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namespace YouCompleteMe {
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const char *COMMENT_AND_STRING_REGEX =
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"//.*?$" // Anything following '//'
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"|"
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"#.*?$" // Anything following '#'
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"|"
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"/\\*.*?\\*/" // C-style comments, '/* ... */'
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"|"
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"'[^']*'" // Anything inside single quotes, '...'
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"|"
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"\"[^\"]*\""; // Anything inside double quotes, "..."
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const char *IDENTIFIER_REGEX = "[_a-zA-Z]\\w*";
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std::string RemoveIdentifierFreeText( std::string text ) {
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boost::erase_all_regex( text, boost::regex( COMMENT_AND_STRING_REGEX ) );
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return text;
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}
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std::vector< std::string > ExtractIdentifiersFromText(
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const std::string &text ) {
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std::string::const_iterator start = text.begin();
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std::string::const_iterator end = text.end();
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boost::match_results< std::string::const_iterator > matches;
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boost::regex expression( IDENTIFIER_REGEX );
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std::vector< std::string > identifiers;
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while ( boost::regex_search( start, end, matches, expression ) ) {
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identifiers.push_back( matches[ 0 ] );
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start = matches[ 0 ].second;
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}
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return identifiers;
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}
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} // namespace YouCompleteMe
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