equal.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// template <class T> constexpr bool operator==(const optional<T>& x, const optional<T>& y);
13
14#include <optional>
15#include <type_traits>
16#include <cassert>
17
18int main()
19{
20#if _LIBCPP_STD_VER > 11
21    {
22    typedef int T;
23    typedef std::optional<T> O;
24
25    constexpr O o1;     // disengaged
26    constexpr O o2;     // disengaged
27    constexpr O o3{1};  // engaged
28    constexpr O o4{2};  // engaged
29    constexpr O o5{1};  // engaged
30
31    static_assert (   o1 == o1 , "" );
32    static_assert (   o1 == o2 , "" );
33    static_assert ( !(o1 == o3), "" );
34    static_assert ( !(o1 == o4), "" );
35    static_assert ( !(o1 == o5), "" );
36
37    static_assert (   o2 == o1 , "" );
38    static_assert (   o2 == o2 , "" );
39    static_assert ( !(o2 == o3), "" );
40    static_assert ( !(o2 == o4), "" );
41    static_assert ( !(o2 == o5), "" );
42
43    static_assert ( !(o3 == o1), "" );
44    static_assert ( !(o3 == o2), "" );
45    static_assert (   o3 == o3 , "" );
46    static_assert ( !(o3 == o4), "" );
47    static_assert (   o3 == o5 , "" );
48
49    static_assert ( !(o4 == o1), "" );
50    static_assert ( !(o4 == o2), "" );
51    static_assert ( !(o4 == o3), "" );
52    static_assert (   o4 == o4 , "" );
53    static_assert ( !(o4 == o5), "" );
54
55    static_assert ( !(o5 == o1), "" );
56    static_assert ( !(o5 == o2), "" );
57    static_assert (   o5 == o3 , "" );
58    static_assert ( !(o5 == o4), "" );
59    static_assert (   o5 == o5 , "" );
60
61    }
62#endif
63}
64