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- /*
- *
- * Copyright (c) 1998-2002
- * 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 partial_regex_match.cpp
- * VERSION see <boost/version.hpp>
- * DESCRIPTION: regex_match example using partial matches.
- */
- #include <boost/regex.hpp>
- #include <string>
- #include <iostream>
- boost::regex e("(\\d{3,4})[- ]?(\\d{4})[- ]?(\\d{4})[- ]?(\\d{4})");
- bool is_possible_card_number(const std::string& input)
- {
- //
- // return false for partial match, true for full match, or throw for
- // impossible match based on what we have so far...
- boost::match_results<std::string::const_iterator> what;
- if(0 == boost::regex_match(input, what, e, boost::match_default | boost::match_partial))
- {
- // the input so far could not possibly be valid so reject it:
- throw std::runtime_error("Invalid data entered - this could not possibly be a valid card number");
- }
- // OK so far so good, but have we finished?
- if(what[0].matched)
- {
- // excellent, we have a result:
- return true;
- }
- // what we have so far is only a partial match...
- return false;
- }
- int main(int argc, char* argv[])
- {
- try{
- std::string input;
- if(argc > 1)
- input = argv[1];
- else
- std::cin >> input;
- if(is_possible_card_number(input))
- {
- std::cout << "Matched OK..." << std::endl;
- }
- else
- std::cout << "Got a partial match..." << std::endl;
- }
- catch(const std::exception& e)
- {
- std::cout << e.what() << std::endl;
- }
- return 0;
- }
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