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
|
//
// 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
//
//===----------------------------------------------------------------------===//
// REQUIRES: has-unix-headers
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// XFAIL: availability-verbose_abort-missing
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_ASSERTIONS=1
// Test construction from span:
//
// template<class OtherIndexType, size_t N>
// constexpr explicit(N != rank_dynamic()) extents(span<OtherIndexType, N> exts) noexcept;
//
// Constraints:
// * is_convertible_v<const OtherIndexType&, index_type> is true,
// * is_nothrow_constructible_v<index_type, const OtherIndexType&> is true, and
// * N == rank_dynamic() || N == rank() is true.
//
// Preconditions:
// * If N != rank_dynamic() is true, exts[r] equals Er for each r for which
// Er is a static extent, and
// * either
// - N is zero, or
// - exts[r] is nonnegative and is representable as a value of type index_type
// for every rank index r.
//
#include <mdspan>
#include <cassert>
#include "check_assertion.h"
int main(int, char**) {
constexpr size_t D = std::dynamic_extent;
// working case sanity check
{
std::array args{1000, 5};
[[maybe_unused]] std::extents<int, D, 5> e1(std::span{args});
}
// mismatch of static extent
{
std::array args{1000, 3};
TEST_LIBCPP_ASSERT_FAILURE(([=] { std::extents<int, D, 5> e1(std::span{args}); }()),
"extents construction: mismatch of provided arguments with static extents.");
}
// value out of range
{
std::array args{1000, 5};
TEST_LIBCPP_ASSERT_FAILURE(([=] { std::extents<char, D, 5> e1(std::span{args}); }()),
"extents ctor: arguments must be representable as index_type and nonnegative");
}
// negative value
{
std::array args{-1, 5};
TEST_LIBCPP_ASSERT_FAILURE(([=] { std::extents<char, D, 5> e1(std::span{args}); }()),
"extents ctor: arguments must be representable as index_type and nonnegative");
}
return 0;
}
|
