boost::algorithm::find_regex — 正则表达式查找算法。
// In header: <boost/algorithm/string/regex.hpp> template<typename RangeT, typename CharT, typename RegexTraitsT> iterator_range< typename range_iterator< RangeT >::type > find_regex(RangeT & Input, const basic_regex< CharT, RegexTraitsT > & Rx, match_flag_type Flags = match_default);