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 
19 void
test()20 test()
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 
main()33 int main()
34 {
35     test();
36 }
37