[Bug libstdc++/64441] A match_results returns an incorrect sub_match if the sub_match::matched is false

[timshen at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64441

--- Comment #4 from Tim Shen <timshen at gcc dot gnu.org> ---
Author: timshen
Date: Tue Mar 10 18:41:46 2015
New Revision: 221330

URL: https://gcc.gnu.org/viewcvs?rev=221330&root=gcc&view=rev
Log:
    PR libstdc++/64441
    * include/bits/regex.h (match_results<>::size,
    match_results<>::position, match_results<>::str,
    match_results<>::operator[], match_results<>::prefix,
    match_results<>::suffix, match_results<>::end,
    match_results<>::_M_resize, match_results<>::_M_unmatched_sub,
    match_results<>::_M_prefix, match_results<>::_M_suffix): Remove
    global __unmatched_sub. Add unmatched submatch as part of
    match_results.
    * include/bits/regex.tcc (__regex_algo_impl<>, regex_replace<>,
    regex_iterator<>::operator++): Adjust to use match_results::_M_prefix.
    * testsuite/28_regex/match_results/out_of_range_submatches.cc:
    New testcases.

Added:
   
trunk/libstdc++-v3/testsuite/28_regex/match_results/out_of_range_submatches.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/bits/regex.h
    trunk/libstdc++-v3/include/bits/regex.tcc