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- /*
- *
- * Copyright (c) 2003-2004
- * John Maddock
- *
- * Use, modification and distribution are subject to the
- * Boost Software License, Version 1.0. (See accompanying file
- * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- *
- */
- /*
- * LOCATION: see http://www.boost.org for most recent version.
- * FILE captures_example.cpp
- * VERSION see <boost/version.hpp>
- * DESCRIPTION: Demonstrate the behaviour of captures.
- */
- #include <boost/regex.hpp>
- #include <iostream>
- void print_captures(const std::string& regx, const std::string& text)
- {
- boost::regex e(regx);
- boost::smatch what;
- std::cout << "Expression: \"" << regx << "\"\n";
- std::cout << "Text: \"" << text << "\"\n";
- if(boost::regex_match(text, what, e, boost::match_extra))
- {
- unsigned i, j;
- std::cout << "** Match found **\n Sub-Expressions:\n";
- for(i = 0; i < what.size(); ++i)
- std::cout << " $" << i << " = \"" << what[i] << "\"\n";
- std::cout << " Captures:\n";
- for(i = 0; i < what.size(); ++i)
- {
- std::cout << " $" << i << " = {";
- for(j = 0; j < what.captures(i).size(); ++j)
- {
- if(j)
- std::cout << ", ";
- else
- std::cout << " ";
- std::cout << "\"" << what.captures(i)[j] << "\"";
- }
- std::cout << " }\n";
- }
- }
- else
- {
- std::cout << "** No Match found **\n";
- }
- }
- int main(int , char* [])
- {
- print_captures("(([[:lower:]]+)|([[:upper:]]+))+", "aBBcccDDDDDeeeeeeee");
- print_captures("a(b+|((c)*))+d", "abd");
- print_captures("(.*)bar|(.*)bah", "abcbar");
- print_captures("(.*)bar|(.*)bah", "abcbah");
- print_captures("^(?:(\\w+)|(?>\\W+))*$", "now is the time for all good men to come to the aid of the party");
- print_captures("^(?>(\\w+)\\W*)*$", "now is the time for all good men to come to the aid of the party");
- print_captures("^(\\w+)\\W+(?>(\\w+)\\W+)*(\\w+)$", "now is the time for all good men to come to the aid of the party");
- print_captures("^(\\w+)\\W+(?>(\\w+)\\W+(?:(\\w+)\\W+){0,2})*(\\w+)$", "now is the time for all good men to come to the aid of the party");
- return 0;
- }
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