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, c++17
10
11// <utility>
12
13// template<class T, class U>
14// constexpr bool cmp_equal(T t, U u) noexcept; // C++20
15
16#include <utility>
17#include <limits>
18#include <numeric>
19#include <tuple>
20#include <cassert>
21
22#include "test_macros.h"
23
24template <typename T>
25struct Tuple {
26 T min;
27 T max;
28 T mid;
29 constexpr Tuple() {
30 min = std::numeric_limits<T>::min();
31 max = std::numeric_limits<T>::max();
32 mid = std::midpoint(min, max);
33 }
34};
35
36template <typename T>
37constexpr void test_cmp_equal1() {
38 constexpr Tuple<T> tup;
39 assert(std::cmp_equal(T(0), T(0)));
40 assert(std::cmp_equal(T(10), T(10)));
41 assert(std::cmp_equal(tup.min, tup.min));
42 assert(std::cmp_equal(tup.max, tup.max));
43 assert(!std::cmp_equal(T(0), T(1)));
44 assert(!std::cmp_equal(T(1), T(0)));
45 assert(!std::cmp_equal(T(5), T(10)));
46 assert(!std::cmp_equal(T(10), T(5)));
47 assert(!std::cmp_equal(tup.min, tup.max));
48 assert(!std::cmp_equal(tup.max, tup.min));
49 assert(!std::cmp_equal(1, tup.max));
50 assert(!std::cmp_equal(tup.max, 1));
51 assert(!std::cmp_equal(1, tup.min));
52 assert(!std::cmp_equal(tup.min, 1));
53 assert(std::cmp_equal(T(-5), T(-5)));
54 assert(!std::cmp_equal(-2, tup.min));
55 assert(!std::cmp_equal(tup.min, -2));
56 assert(!std::cmp_equal(-2, tup.max));
57 assert(!std::cmp_equal(tup.max, -2));
58}
59
60template <typename T, typename U>
61constexpr void test_cmp_equal2() {
62 constexpr Tuple<T> ttup;
63 constexpr Tuple<U> utup;
64 assert(std::cmp_equal(T(0), U(0)));
65 assert(std::cmp_equal(T(10), U(10)));
66 assert(!std::cmp_equal(T(0), U(1)));
67 assert(!std::cmp_equal(T(1), U(0)));
68 assert(!std::cmp_equal(T(5), U(10)));
69 assert(!std::cmp_equal(T(10), U(5)));
70 assert(!std::cmp_equal(ttup.min, utup.max));
71 assert(!std::cmp_equal(utup.min, ttup.max));
72}
73
74template <class... Ts>
75constexpr void test1(const std::tuple<Ts...>&) {
76 (test_cmp_equal1<Ts>() , ...);
77}
78
79template <class T, class... Us>
80constexpr void test2_impl(const std::tuple<Us...>&) {
81 (test_cmp_equal2<T, Us>() , ...);
82}
83
84template <class... Ts, class UTuple>
85constexpr void test2(const std::tuple<Ts...>&, const UTuple& utuple) {
86 (test2_impl<Ts>(utuple) , ...);
87}
88
89constexpr bool test() {
90 std::tuple<
91#ifndef TEST_HAS_NO_INT128
92 __int128_t, __uint128_t,
93#endif
94 unsigned long long, long long, unsigned long, long, unsigned int, int,
95 unsigned short, short, unsigned char, signed char> types;
96 test1(types);
97 test2(types, utuple: types);
98 return true;
99}
100
101int main(int, char**) {
102 ASSERT_NOEXCEPT(std::cmp_equal(0, 0));
103 test();
104 static_assert(test());
105 return 0;
106}
107

source code of libcxx/test/std/utilities/utility/utility.intcmp/intcmp.cmp_equal/cmp_equal.pass.cpp