id summary reporter owner description type status milestone component version severity resolution keywords cc 4215 match_results docs incorrectly refer to returning strings Jonathan Wakely John Maddock "The documentation for {{{match_results::length}}} and {{{match_results::position}}} both say: ''The overloads that accept a string refer to a named sub-expression n. In the event that there is no such named sub-expression then returns an empty string. '' Those functions return {{{difference_type}}} not a string" Bugs closed Boost 1.43.0 regex Boost Development Trunk Problem fixed