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
|
//===---------------------------------------------------------------------===//
//
// 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
// <span>
// template <class It>
// constexpr explicit(Extent != dynamic_extent) span(It first, size_type count);
// If Extent is not equal to dynamic_extent, then count shall be equal to Extent.
//
// constexpr explicit(extent != dynamic_extent) span(std::initializer_list<value_type> il); // Since C++26
#include <span>
#include <cstddef>
#include "test_macros.h"
template <class T, std::size_t extent>
std::span<T, extent> createImplicitSpan(T* ptr, std::size_t len) {
return {ptr, len}; // expected-error {{chosen constructor is explicit in copy-initialization}}
}
void test() {
// explicit constructor necessary
int arr[] = {1, 2, 3};
createImplicitSpan<int, 1>(arr, 3);
// expected-error@+1 {{no matching constructor for initialization of 'std::span<int>'}}
std::span<int> sp = {0, 0};
// expected-error@+1 {{no matching constructor for initialization of 'std::span<int, 2>'}}
std::span<int, 2> sp2 = {0, 0};
#if TEST_STD_VER < 26
// expected-error@+1 {{no matching constructor for initialization of 'std::span<const int>'}}
std::span<const int> csp = {0, 0};
// expected-error@+1 {{no matching constructor for initialization of 'std::span<const int, 2>'}}
std::span<const int, 2> csp2 = {0, 0};
#endif
}
|
