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
