1 // -*- C++ -*-
2 //===------------------------------ span ---------------------------------===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===---------------------------------------------------------------------===//
9 // UNSUPPORTED: c++03, c++11, c++14, c++17
10
11 // <span>
12
13 // template<size_t Count>
14 // constexpr span<element_type, Count> last() const;
15 //
16 // constexpr span<element_type, dynamic_extent> last(size_type count) const;
17 //
18 // Requires: Count <= size().
19
20 #include <span>
21
22 #include <cstddef>
23
24 #include "test_macros.h"
25
26 constexpr int carr[] = {1, 2, 3, 4};
27
main(int,char **)28 int main(int, char**) {
29 std::span<const int, 4> sp(carr);
30
31 // Count too large
32 {
33 [[maybe_unused]] auto s1 = sp.last<5>(); // expected-error-re@span:* {{static_assert failed{{( due to requirement '.*')?}} "Count out of range in span::last()"}}
34 }
35
36 // Count numeric_limits
37 {
38 [[maybe_unused]] auto s1 = sp.last<std::size_t(-1)>(); // expected-error-re@span:* {{static_assert failed{{( due to requirement '.*')?}} "Count out of range in span::last()"}}
39 }
40
41 return 0;
42 }
43