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 // <optional>
11 
12 // class bad_optional_access;
13 // explicit bad_optional_access(const char* what_arg);
14 
15 #include <experimental/optional>
16 #include <string>
17 #include <cstring>
18 #include <cassert>
19 
20 int main()
21 {
22 #if _LIBCPP_STD_VER > 11
23     using std::experimental::bad_optional_access;
24 
25     const char* s = "message";
26     bad_optional_access e(s);
27     assert(std::strcmp(e.what(), s) == 0);
28 #endif  // _LIBCPP_STD_VER > 11
29 }
30