1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <regex>
11
12// template <class BidirectionalIterator, class Allocator, class charT, class traits>
13//     bool
14//     regex_search(BidirectionalIterator first, BidirectionalIterator last,
15//                  match_results<BidirectionalIterator, Allocator>& m,
16//                  const basic_regex<charT, traits>& e,
17//                  regex_constants::match_flag_type flags = regex_constants::match_default);
18
19// http://llvm.org/bugs/show_bug.cgi?id=11118
20
21#include <regex>
22#include <cassert>
23
24int main()
25{
26    assert(!std::regex_search("ab", std::regex("(?=^)b")));
27    assert(!std::regex_search("ab", std::regex("a(?=^)b")));
28}
29