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Diffstat (limited to 'boost/algorithm/string/detail/finder_regex.hpp')
-rw-r--r-- | boost/algorithm/string/detail/finder_regex.hpp | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/boost/algorithm/string/detail/finder_regex.hpp b/boost/algorithm/string/detail/finder_regex.hpp new file mode 100644 index 000000000..01bf5a082 --- /dev/null +++ b/boost/algorithm/string/detail/finder_regex.hpp @@ -0,0 +1,122 @@ +// Boost string_algo library find_regex.hpp header file ---------------------------// + +// Copyright Pavol Droba 2002-2003. +// +// Distributed under 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) + +// See http://www.boost.org/ for updates, documentation, and revision history. + +#ifndef BOOST_STRING_FINDER_REGEX_DETAIL_HPP +#define BOOST_STRING_FINDER_REGEX_DETAIL_HPP + +#include <boost/algorithm/string/config.hpp> +#include <boost/regex.hpp> + +#include <boost/range/iterator_range.hpp> +#include <boost/range/begin.hpp> +#include <boost/range/end.hpp> + +namespace boost { + namespace algorithm { + namespace detail { + +// regex find functor -----------------------------------------------// + + // regex search result + template<typename IteratorT> + struct regex_search_result : + public iterator_range<IteratorT> + { + typedef regex_search_result<IteratorT> type; + typedef iterator_range<IteratorT> base_type; + typedef BOOST_STRING_TYPENAME base_type::value_type value_type; + typedef BOOST_STRING_TYPENAME base_type::difference_type difference_type; + typedef BOOST_STRING_TYPENAME base_type::const_iterator const_iterator; + typedef BOOST_STRING_TYPENAME base_type::iterator iterator; + typedef boost::match_results<iterator> match_results_type; + + // Construction + + // Construction from the match result + regex_search_result( const match_results_type& MatchResults ) : + base_type( MatchResults[0].first, MatchResults[0].second ), + m_MatchResults( MatchResults ) {} + + // Construction of empty match. End iterator has to be specified + regex_search_result( IteratorT End ) : + base_type( End, End ) {} + + regex_search_result( const regex_search_result& Other ) : + base_type( Other.begin(), Other.end() ), + m_MatchResults( Other.m_MatchResults ) {} + + // Assignment + regex_search_result& operator=( const regex_search_result& Other ) + { + base_type::operator=( Other ); + m_MatchResults=Other.m_MatchResults; + return *this; + } + + // Match result retrieval + const match_results_type& match_results() const + { + return m_MatchResults; + } + + private: + // Saved match result + match_results_type m_MatchResults; + }; + + // find_regex + /* + Regex based search functor + */ + template<typename RegExT> + struct find_regexF + { + typedef RegExT regex_type; + typedef const RegExT& regex_reference_type; + + // Construction + find_regexF( regex_reference_type Rx, match_flag_type MatchFlags = match_default ) : + m_Rx(Rx), m_MatchFlags(MatchFlags) {} + + // Operation + template< typename ForwardIteratorT > + regex_search_result<ForwardIteratorT> + operator()( + ForwardIteratorT Begin, + ForwardIteratorT End ) const + { + typedef ForwardIteratorT input_iterator_type; + typedef regex_search_result<ForwardIteratorT> result_type; + + // instantiate match result + match_results<input_iterator_type> result; + // search for a match + if ( ::boost::regex_search( Begin, End, result, m_Rx, m_MatchFlags ) ) + { + // construct a result + return result_type( result ); + } + else + { + // empty result + return result_type( End ); + } + } + + private: + regex_reference_type m_Rx; // Regexp + match_flag_type m_MatchFlags; // match flags + }; + + } // namespace detail + } // namespace algorithm +} // namespace boost + +#endif // BOOST_STRING_FIND_DETAIL_HPP |