1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// <optional>
// [optional.relops], relational operators
// template<class T, three_way_comparable_with<T> U>
// constexpr compare_three_way_result_t<T, U>
// operator<=>(const optional<T>&, const optional<U>&);
#include <cassert>
#include <compare>
#include <optional>
#include "test_comparisons.h"
constexpr bool test() {
{
std::optional<int> op1;
std::optional<int> op2;
assert((op1 <=> op2) == std::strong_ordering::equal);
assert(testOrder(op1, op2, std::strong_ordering::equal));
}
{
std::optional<int> op1{3};
std::optional<int> op2{3};
assert((op1 <=> op1) == std::strong_ordering::equal);
assert(testOrder(op1, op1, std::strong_ordering::equal));
assert((op1 <=> op2) == std::strong_ordering::equal);
assert(testOrder(op1, op2, std::strong_ordering::equal));
assert((op2 <=> op1) == std::strong_ordering::equal);
assert(testOrder(op2, op1, std::strong_ordering::equal));
}
{
std::optional<int> op;
std::optional<int> op1{2};
std::optional<int> op2{3};
assert((op <=> op2) == std::strong_ordering::less);
assert(testOrder(op, op2, std::strong_ordering::less));
assert((op1 <=> op2) == std::strong_ordering::less);
assert(testOrder(op1, op2, std::strong_ordering::less));
}
{
std::optional<int> op;
std::optional<int> op1{3};
std::optional<int> op2{2};
assert((op1 <=> op) == std::strong_ordering::greater);
assert(testOrder(op1, op, std::strong_ordering::greater));
assert((op1 <=> op2) == std::strong_ordering::greater);
assert(testOrder(op1, op2, std::strong_ordering::greater));
}
return true;
}
int main(int, char**) {
assert(test());
static_assert(test());
return 0;
}
|
