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 sub_match;
13 
14 // difference_type length() const;
15 
16 #include <regex>
17 #include <cassert>
18 
19 int main()
20 {
21     {
22         typedef char CharT;
23         typedef std::sub_match<const CharT*> SM;
24         SM sm = SM();
25         assert(sm.length() == 0);
26         const CharT s[] = {'1', '2', '3', 0};
27         sm.first = s;
28         sm.second = s + 3;
29         sm.matched = true;
30         assert(sm.length() == 3);
31     }
32     {
33         typedef wchar_t CharT;
34         typedef std::sub_match<const CharT*> SM;
35         SM sm = SM();
36         assert(sm.length() == 0);
37         const CharT s[] = {'1', '2', '3', 0};
38         sm.first = s;
39         sm.second = s + 3;
40         sm.matched = true;
41         assert(sm.length() == 3);
42     }
43 }
44