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 // const_reference prefix() 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 
26     assert(m.prefix().first == s);
27     assert(m.prefix().second == s+2);
28     assert(m.prefix().matched == true);
29 }
30 
main()31 int main()
32 {
33     test();
34 }
35