1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // UNSUPPORTED: c++03, c++11, c++14
10 // <optional>
11
12 // template <class T, class U> constexpr bool operator>(const optional<T>& x, const U& v);
13 // template <class T, class U> constexpr bool operator>(const U& v, const optional<T>& x);
14
15 #include <optional>
16
17 #include "test_macros.h"
18
19 using std::optional;
20
21 struct X {
22 int i_;
23
XX24 constexpr X(int i) : i_(i) {}
25 };
26
operator >(const X & lhs,const X & rhs)27 constexpr bool operator>(const X& lhs, const X& rhs) { return lhs.i_ > rhs.i_; }
28
main(int,char **)29 int main(int, char**) {
30 {
31 typedef X T;
32 typedef optional<T> O;
33
34 constexpr T val(2);
35 constexpr O o1; // disengaged
36 constexpr O o2{1}; // engaged
37 constexpr O o3{val}; // engaged
38
39 static_assert(!(o1 > T(1)), "");
40 static_assert(!(o2 > T(1)), ""); // equal
41 static_assert((o3 > T(1)), "");
42 static_assert(!(o2 > val), "");
43 static_assert(!(o3 > val), ""); // equal
44 static_assert(!(o3 > T(3)), "");
45
46 static_assert((T(1) > o1), "");
47 static_assert(!(T(1) > o2), ""); // equal
48 static_assert(!(T(1) > o3), "");
49 static_assert((val > o2), "");
50 static_assert(!(val > o3), ""); // equal
51 static_assert((T(3) > o3), "");
52 }
53 {
54 using O = optional<int>;
55 constexpr O o1(42);
56 static_assert(o1 > 11l, "");
57 static_assert(!(42l > o1), "");
58 }
59 {
60 using O = optional<const int>;
61 constexpr O o1(42);
62 static_assert(o1 > 11, "");
63 static_assert(!(42 > o1), "");
64 }
65
66 return 0;
67 }
68