| //===----------------------------------------------------------------------===// |
| // |
| // 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-has-no-incomplete-ranges |
| |
| // AppleClang 12.0.0 doesn't fully support ranges/concepts |
| // XFAIL: apple-clang-12.0.0 |
| |
| // <span> |
| |
| // template<size_t Count> |
| // constexpr span<element_type, Count> last() const; |
| // |
| // constexpr span<element_type, dynamic_extent> last(size_type count) const; |
| // |
| // Requires: Count <= size(). |
| |
| #include <span> |
| |
| #include <cstddef> |
| |
| #include "test_macros.h" |
| |
| constexpr int carr[] = {1, 2, 3, 4}; |
| |
| int main(int, char**) { |
| std::span<const int, 4> sp(carr); |
| |
| // Count too large |
| { |
| [[maybe_unused]] auto s1 = sp.last<5>(); // expected-error-re@span:* {{static_assert failed{{( due to requirement '.*')?}} "Count out of range in span::last()"}} |
| } |
| |
| // Count numeric_limits |
| { |
| [[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()"}} |
| } |
| |
| return 0; |
| } |