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// class match_results<BidirectionalIterator, Allocator>
13
14// difference_type length(size_type sub = 0) const;
15
16#include <regex>
17#include <cassert>
18
19void
20test()
21{
22    std::match_results<const char*> m;
23    const char s[] = "abcdefghijk";
24    assert(std::regex_search(s, m, std::regex("cd((e)fg)hi")));
25    assert(m.length() == m[0].length());
26    assert(m.length(0) == m[0].length());
27    assert(m.length(1) == m[1].length());
28    assert(m.length(2) == m[2].length());
29    assert(m.length(3) == m[3].length());
30    assert(m.length(4) == m[4].length());
31}
32
33int main()
34{
35    test();
36}
37