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
|
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <numeric>
// UNSUPPORTED: c++03, c++11, c++14
// template <class InputIterator1, class InputIterator2, class T>
// T transform_reduce(InputIterator1 first1, InputIterator1 last1,
// InputIterator2 first2, T init);
#include <numeric>
#include <cassert>
#include <iterator>
#include "test_macros.h"
#include "MoveOnly.h"
#include "test_iterators.h"
template <class Iter1, class Iter2, class T>
void
test(Iter1 first1, Iter1 last1, Iter2 first2, T init, T x)
{
static_assert( std::is_same_v<T,
decltype(std::transform_reduce(first1, last1, first2, init))> );
assert(std::transform_reduce(first1, last1, first2, init) == x);
}
template <class SIter, class UIter>
void
test()
{
int ia[] = {1, 2, 3, 4, 5, 6};
unsigned int ua[] = {2, 4, 6, 8, 10,12};
unsigned sa = sizeof(ia) / sizeof(ia[0]);
assert(sa == sizeof(ua) / sizeof(ua[0])); // just to be sure
test(SIter(ia), SIter(ia), UIter(ua), 0, 0);
test(UIter(ua), UIter(ua), SIter(ia), 1, 1);
test(SIter(ia), SIter(ia+1), UIter(ua), 0, 2);
test(UIter(ua), UIter(ua+1), SIter(ia), 2, 4);
test(SIter(ia), SIter(ia+2), UIter(ua), 0, 10);
test(UIter(ua), UIter(ua+2), SIter(ia), 3, 13);
test(SIter(ia), SIter(ia+sa), UIter(ua), 0, 182);
test(UIter(ua), UIter(ua+sa), SIter(ia), 4, 186);
}
template <typename T, typename Init>
void test_return_type()
{
T *p = nullptr;
static_assert( std::is_same_v<Init,
decltype(std::transform_reduce(p, p, p, Init{}))> );
}
void test_move_only_types()
{
MoveOnly ia[] = {{1}, {2}, {3}};
MoveOnly ib[] = {{1}, {2}, {3}};
assert(14 ==
std::transform_reduce(std::begin(ia), std::end(ia), std::begin(ib), MoveOnly{0}).get());
}
int main(int, char**)
{
test_return_type<char, int>();
test_return_type<int, int>();
test_return_type<int, unsigned long>();
test_return_type<float, int>();
test_return_type<short, float>();
test_return_type<double, char>();
test_return_type<char, double>();
// All the iterator categories
test<input_iterator <const int*>, input_iterator <const unsigned int*> >();
test<input_iterator <const int*>, forward_iterator <const unsigned int*> >();
test<input_iterator <const int*>, bidirectional_iterator<const unsigned int*> >();
test<input_iterator <const int*>, random_access_iterator<const unsigned int*> >();
test<forward_iterator <const int*>, input_iterator <const unsigned int*> >();
test<forward_iterator <const int*>, forward_iterator <const unsigned int*> >();
test<forward_iterator <const int*>, bidirectional_iterator<const unsigned int*> >();
test<forward_iterator <const int*>, random_access_iterator<const unsigned int*> >();
test<bidirectional_iterator<const int*>, input_iterator <const unsigned int*> >();
test<bidirectional_iterator<const int*>, forward_iterator <const unsigned int*> >();
test<bidirectional_iterator<const int*>, bidirectional_iterator<const unsigned int*> >();
test<bidirectional_iterator<const int*>, random_access_iterator<const unsigned int*> >();
test<random_access_iterator<const int*>, input_iterator <const unsigned int*> >();
test<random_access_iterator<const int*>, forward_iterator <const unsigned int*> >();
test<random_access_iterator<const int*>, bidirectional_iterator<const unsigned int*> >();
test<random_access_iterator<const int*>, random_access_iterator<const unsigned int*> >();
// just plain pointers (const vs. non-const, too)
test<const int*, const unsigned int *>();
test<const int*, unsigned int *>();
test< int*, const unsigned int *>();
test< int*, unsigned int *>();
test_move_only_types();
return 0;
}
|
