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
|
//===----------------------------------------------------------------------===//
//
// 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: clang-8
// Became constexpr in C++20
// template <class ForwardIterator, class T>
// void iota(ForwardIterator first, ForwardIterator last, T value);
#include <numeric>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
template <class InIter>
TEST_CONSTEXPR_CXX20 void
test()
{
int ia[] = {1, 2, 3, 4, 5};
int ir[] = {5, 6, 7, 8, 9};
const unsigned s = sizeof(ia) / sizeof(ia[0]);
std::iota(InIter(ia), InIter(ia+s), 5);
for (unsigned i = 0; i < s; ++i)
assert(ia[i] == ir[i]);
}
TEST_CONSTEXPR_CXX20 bool
test()
{
test<forward_iterator<int*> >();
test<bidirectional_iterator<int*> >();
test<random_access_iterator<int*> >();
test<int*>();
return true;
}
int main(int, char**)
{
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
|
