diff --git a/include/regex b/include/regex index 312ca114..36d56770 100644 --- a/include/regex +++ b/include/regex @@ -5773,7 +5773,8 @@ basic_regex<_CharT, _Traits>::__search( { __m.__init(1 + mark_count(), __first, __last, __flags & regex_constants::__no_update_pos); - if (__match_at_start(__first, __last, __m, __flags, true)) + if (__match_at_start(__first, __last, __m, __flags, + !(__flags & regex_constants::__no_update_pos))) { __m.__prefix_.second = __m[0].first; __m.__prefix_.matched = __m.__prefix_.first != __m.__prefix_.second; diff --git a/test/re/re.alg/re.alg.search/no_update_pos.pass.cpp b/test/re/re.alg/re.alg.search/no_update_pos.pass.cpp new file mode 100644 index 00000000..63fcdafe --- /dev/null +++ b/test/re/re.alg/re.alg.search/no_update_pos.pass.cpp @@ -0,0 +1,38 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +// + +// template +// bool +// regex_search(BidirectionalIterator first, BidirectionalIterator last, +// match_results& m, +// const basic_regex& e, +// regex_constants::match_flag_type flags = regex_constants::match_default); + +#include +#include + +int main() +{ + // Iterating over /^a/ should yield one instance at the beginning + // of the text. + + const char *text = "aaa\naa"; + std::regex re{"^a"}; + std::cregex_iterator it{text, text+6, re}; + std::cregex_iterator end{}; + + assert(it->str() == "a"); + assert(it->position(0) == 0); + assert(it->length(0) == 1); + + ++it; + assert(it == end); +}