20b538fc64
LWG3103 Errors in taking subview of span should be ill-formed where possible Note that the real work was already done before, including tests. Reviewed By: #libc, ldionne Differential Revision: https://reviews.llvm.org/D143432
30 lines
963 B
C++
30 lines
963 B
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// <span>
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// template<size_t Count>
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// constexpr span<element_type, Count> last() const;
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//
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// Mandates: Count <= Extent is true.
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#include <span>
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#include <cstddef>
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void f() {
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int array[] = {1, 2, 3, 4};
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std::span<const int, 4> sp(array);
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// Count too large
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[[maybe_unused]] auto s1 = sp.last<5>(); // expected-error@span:* {{span<T, N>::last<Count>(): Count out of range}}
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// Count numeric_limits
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[[maybe_unused]] auto s2 = sp.last<std::size_t(-1)>(); // expected-error@span:* {{span<T, N>::last<Count>(): Count out of range}}
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}
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