//===----------------------------------------------------------------------===//
//
//                     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.
//
//===----------------------------------------------------------------------===//

// <regex>

// class match_results<BidirectionalIterator, Allocator>

// const_reference prefix() const;

#include <regex>
#include <cassert>

void
test()
{
    std::match_results<const char*> m;
    const char s[] = "abcdefghijk";
    assert(std::regex_search(s, m, std::regex("cd((e)fg)hi")));

    assert(m.prefix().first == s);
    assert(m.prefix().second == s+2);
    assert(m.prefix().matched == true);
}

int main()
{
    test();
}