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// constexpr bool cmp_greater_equal(T t, U u) noexcept; // C++20
14
15#include <utility>
16#include <cassert>
17#include <limits>
18#include <numeric>
19#include <tuple>
20#include <type_traits>
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_greater_equal1() {
38 constexpr Tuple<T> tup;
39 assert(!std::cmp_greater_equal(T(0), T(1)));
40 assert(!std::cmp_greater_equal(T(1), T(2)));
41 assert(!std::cmp_greater_equal(tup.min, tup.max));
42 assert(!std::cmp_greater_equal(tup.min, tup.mid));
43 assert(!std::cmp_greater_equal(tup.mid, tup.max));
44 assert(std::cmp_greater_equal(T(1), T(0)));
45 assert(std::cmp_greater_equal(T(10), T(5)));
46 assert(std::cmp_greater_equal(tup.max, tup.min));
47 assert(std::cmp_greater_equal(tup.mid, tup.min));
48 assert(std::cmp_greater_equal(tup.mid, tup.mid));
49 assert(std::cmp_greater_equal(tup.min, tup.min));
50 assert(std::cmp_greater_equal(tup.max, tup.max));
51 assert(std::cmp_greater_equal(tup.max, 1));
52 assert(std::cmp_greater_equal(1, tup.min));
53 assert(std::cmp_greater_equal(T(-1), T(-1)));
54 assert(std::cmp_greater_equal(-2, tup.min) == std::is_signed_v<T>);
55 assert(std::cmp_greater_equal(tup.min, -2) == std::is_unsigned_v<T>);
56 assert(!std::cmp_greater_equal(-2, tup.max));
57 assert(std::cmp_greater_equal(tup.max, -2));
58}
59
60template <typename T, typename U>
61constexpr void test_cmp_greater_equal2() {
62 assert(!std::cmp_greater_equal(T(0), U(1)));
63 assert(std::cmp_greater_equal(T(1), U(0)));
64 assert(std::cmp_greater_equal(T(0), U(0)));
65 assert(std::cmp_greater_equal(T(1), U(1)));
66}
67
68template <class... Ts>
69constexpr void test1(const std::tuple<Ts...>&) {
70 (test_cmp_greater_equal1<Ts>() , ...);
71}
72
73template <class T, class... Us>
74constexpr void test2_impl(const std::tuple<Us...>&) {
75 (test_cmp_greater_equal2<T, Us>() , ...);
76}
77
78template <class... Ts, class UTuple>
79constexpr void test2(const std::tuple<Ts...>&, const UTuple& utuple) {
80 (test2_impl<Ts>(utuple) , ...);
81}
82
83constexpr bool test() {
84 std::tuple<
85#ifndef TEST_HAS_NO_INT128
86 __int128_t, __uint128_t,
87#endif
88 unsigned long long, long long, unsigned long, long, unsigned int, int,
89 unsigned short, short, unsigned char, signed char> types;
90 test1(types);
91 test2(types, utuple: types);
92 return true;
93}
94
95int main(int, char**) {
96 ASSERT_NOEXCEPT(std::cmp_greater_equal(1, 0));
97 test();
98 static_assert(test());
99 return 0;
100}
101

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