copy_assign.pass.cpp revision 01afa5c6e407e985d9643707d7b7ab1384bd9317 
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// bad_optional_access& operator=(const bad_optional_access&);
14
15#include <optional>
16#include <string>
17#include <cstring>
18#include <type_traits>
19#include <cassert>
20
21#if _LIBCPP_STD_VER > 11
22
23#endif  // _LIBCPP_STD_VER > 11
24
25int main()
26{
27#if _LIBCPP_STD_VER > 11
28    static_assert(std::is_nothrow_copy_assignable<std::bad_optional_access>::value, "");
29    const std::string s1("one message");
30    const std::string s2("another message");
31    std::bad_optional_access e1(s1);
32    std::bad_optional_access e2(s2);
33    assert(std::strcmp(e1.what(), e2.what()) != 0);
34    e1 = e2;
35    assert(std::strcmp(e1.what(), e2.what()) == 0);
36#endif  // _LIBCPP_STD_VER > 11
37}
38