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
|
//===----------------------------------------------------------------------===//
//
// 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
// UNSUPPORTED: libcpp-no-concepts
// UNSUPPORTED: libcpp-has-no-incomplete-ranges
// ranges::prev(it)
#include <iterator>
#include <cassert>
#include "test_iterators.h"
template <class It>
constexpr void check(int* first, int* expected) {
It it(first);
std::same_as<It> auto result = std::ranges::prev(std::move(it));
assert(base(result) == expected);
}
constexpr bool test() {
int range[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
for (int n = 1; n != 10; ++n) {
check<bidirectional_iterator<int*>>(range+n, range+n-1);
check<random_access_iterator<int*>>(range+n, range+n-1);
check<contiguous_iterator<int*>>( range+n, range+n-1);
check<int*>( range+n, range+n-1);
}
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
|
