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 optional<U>& y);
13
14 #include <optional>
15
16 #include "test_macros.h"
17
18 using std::optional;
19
20 struct X {
21 int i_;
22
XX23 constexpr X(int i) : i_(i) {}
24 };
25
operator <=(const X & lhs,const X & rhs)26 constexpr bool operator<=(const X& lhs, const X& rhs) {
27 return lhs.i_ <= rhs.i_;
28 }
29
main(int,char **)30 int main(int, char**) {
31 {
32 typedef optional<X> O;
33
34 constexpr O o1; // disengaged
35 constexpr O o2; // disengaged
36 constexpr O o3{1}; // engaged
37 constexpr O o4{2}; // engaged
38 constexpr O o5{1}; // engaged
39
40 static_assert((o1 <= o1), "");
41 static_assert((o1 <= o2), "");
42 static_assert((o1 <= o3), "");
43 static_assert((o1 <= o4), "");
44 static_assert((o1 <= o5), "");
45
46 static_assert((o2 <= o1), "");
47 static_assert((o2 <= o2), "");
48 static_assert((o2 <= o3), "");
49 static_assert((o2 <= o4), "");
50 static_assert((o2 <= o5), "");
51
52 static_assert(!(o3 <= o1), "");
53 static_assert(!(o3 <= o2), "");
54 static_assert((o3 <= o3), "");
55 static_assert((o3 <= o4), "");
56 static_assert((o3 <= o5), "");
57
58 static_assert(!(o4 <= o1), "");
59 static_assert(!(o4 <= o2), "");
60 static_assert(!(o4 <= o3), "");
61 static_assert((o4 <= o4), "");
62 static_assert(!(o4 <= o5), "");
63
64 static_assert(!(o5 <= o1), "");
65 static_assert(!(o5 <= o2), "");
66 static_assert((o5 <= o3), "");
67 static_assert((o5 <= o4), "");
68 static_assert((o5 <= o5), "");
69 }
70 {
71 using O1 = optional<int>;
72 using O2 = optional<long>;
73 constexpr O1 o1(42);
74 static_assert(o1 <= O2(42), "");
75 static_assert(!(O2(101) <= o1), "");
76 }
77 {
78 using O1 = optional<int>;
79 using O2 = optional<const int>;
80 constexpr O1 o1(42);
81 static_assert(o1 <= O2(42), "");
82 static_assert(!(O2(101) <= o1), "");
83 }
84
85 return 0;
86 }
87