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
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
//===----------------------------------------------------------------------===//
//
// 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
// <numeric>
// template <class _Tp>
// _Tp midpoint(_Tp __a, _Tp __b) noexcept
//
#include <stdint.h>
#include <limits>
#include <numeric>
#include <cassert>
#include "test_macros.h"
template <typename T>
void signed_test()
{
constexpr T zero{0};
constexpr T one{1};
constexpr T two{2};
constexpr T three{3};
constexpr T four{4};
ASSERT_SAME_TYPE(decltype(std::midpoint(T(), T())), T);
ASSERT_NOEXCEPT( std::midpoint(T(), T()));
using limits = std::numeric_limits<T>;
static_assert(std::midpoint(one, three) == two, "");
static_assert(std::midpoint(three, one) == two, "");
assert(std::midpoint(zero, zero) == zero);
assert(std::midpoint(zero, two) == one);
assert(std::midpoint(two, zero) == one);
assert(std::midpoint(two, two) == two);
assert(std::midpoint(one, four) == two);
assert(std::midpoint(four, one) == three);
assert(std::midpoint(three, four) == three);
assert(std::midpoint(four, three) == four);
assert(std::midpoint(T( 3), T( 4)) == T(3));
assert(std::midpoint(T( 4), T( 3)) == T(4));
assert(std::midpoint(T(-3), T( 4)) == T(0));
assert(std::midpoint(T(-4), T( 3)) == T(-1));
assert(std::midpoint(T( 3), T(-4)) == T(0));
assert(std::midpoint(T( 4), T(-3)) == T(1));
assert(std::midpoint(T(-3), T(-4)) == T(-3));
assert(std::midpoint(T(-4), T(-3)) == T(-4));
static_assert(std::midpoint(limits::min(), limits::max()) == T(-1), "");
static_assert(std::midpoint(limits::max(), limits::min()) == T( 0), "");
static_assert(std::midpoint(limits::min(), T(6)) == limits::min()/2 + 3, "");
assert( std::midpoint(T(6), limits::min()) == limits::min()/2 + 3);
assert( std::midpoint(limits::max(), T(6)) == limits::max()/2 + 4);
static_assert(std::midpoint(T(6), limits::max()) == limits::max()/2 + 3, "");
assert( std::midpoint(limits::min(), T(-6)) == limits::min()/2 - 3);
static_assert(std::midpoint(T(-6), limits::min()) == limits::min()/2 - 3, "");
static_assert(std::midpoint(limits::max(), T(-6)) == limits::max()/2 - 2, "");
assert( std::midpoint(T(-6), limits::max()) == limits::max()/2 - 3);
}
template <typename T>
void unsigned_test()
{
constexpr T zero{0};
constexpr T one{1};
constexpr T two{2};
constexpr T three{3};
constexpr T four{4};
ASSERT_SAME_TYPE(decltype(std::midpoint(T(), T())), T);
ASSERT_NOEXCEPT( std::midpoint(T(), T()));
using limits = std::numeric_limits<T>;
const T half_way = (limits::max() - limits::min())/2;
static_assert(std::midpoint(one, three) == two, "");
static_assert(std::midpoint(three, one) == two, "");
assert(std::midpoint(zero, zero) == zero);
assert(std::midpoint(zero, two) == one);
assert(std::midpoint(two, zero) == one);
assert(std::midpoint(two, two) == two);
assert(std::midpoint(one, four) == two);
assert(std::midpoint(four, one) == three);
assert(std::midpoint(three, four) == three);
assert(std::midpoint(four, three) == four);
assert(std::midpoint(limits::min(), limits::max()) == T(half_way));
assert(std::midpoint(limits::max(), limits::min()) == T(half_way + 1));
static_assert(std::midpoint(limits::min(), T(6)) == limits::min()/2 + 3, "");
assert( std::midpoint(T(6), limits::min()) == limits::min()/2 + 3);
assert( std::midpoint(limits::max(), T(6)) == half_way + 4);
static_assert(std::midpoint(T(6), limits::max()) == half_way + 3, "");
}
int main(int, char**)
{
signed_test<signed char>();
signed_test<short>();
signed_test<int>();
signed_test<long>();
signed_test<long long>();
signed_test<int8_t>();
signed_test<int16_t>();
signed_test<int32_t>();
signed_test<int64_t>();
unsigned_test<unsigned char>();
unsigned_test<unsigned short>();
unsigned_test<unsigned int>();
unsigned_test<unsigned long>();
unsigned_test<unsigned long long>();
unsigned_test<uint8_t>();
unsigned_test<uint16_t>();
unsigned_test<uint32_t>();
unsigned_test<uint64_t>();
#ifndef _LIBCPP_HAS_NO_INT128
unsigned_test<__uint128_t>();
signed_test<__int128_t>();
#endif
// int_test<char>();
signed_test<ptrdiff_t>();
unsigned_test<size_t>();
return 0;
}
|
