28e82982fe
Now that we've branched for the LLVM 14 release, our support window moves to clang-13 and clang-14. Similarly, AppleClang 13 has been released for some time now, so that should be the oldest compiler we support, per our policy. A possible follow-up would be to remove _LIBCPP_HAS_NO_CONCEPTS, since I don't think we support any compiler that doesn't support concepts anymore. Differential Revision: https://reviews.llvm.org/D118831
54 lines
1.9 KiB
C++
54 lines
1.9 KiB
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 Offset, size_t Count = dynamic_extent>
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// constexpr span<element_type, see below> subspan() const;
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//
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// constexpr span<element_type, dynamic_extent> subspan(
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// size_type offset, size_type count = dynamic_extent) const;
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//
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// Requires: offset <= size() &&
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// (count == dynamic_extent || count <= size() - offset)
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#include <span>
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#include <cstddef>
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#include "test_macros.h"
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constexpr int carr[] = {1, 2, 3, 4};
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int main(int, char**) {
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std::span<const int, 4> sp(carr);
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// Offset too large templatized
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{
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[[maybe_unused]] auto s1 = sp.subspan<5>(); // expected-error-re@span:* {{static_assert failed{{( due to requirement '.*')?}} "Offset out of range in span::subspan()"}}
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}
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// Count too large templatized
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{
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[[maybe_unused]] auto s1 = sp.subspan<0, 5>(); // expected-error-re@span:* {{static_assert failed{{( due to requirement '.*')?}} "Offset + count out of range in span::subspan()"}}
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}
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// Offset + Count too large templatized
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{
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[[maybe_unused]] auto s1 = sp.subspan<2, 3>(); // expected-error-re@span:* {{static_assert failed{{( due to requirement '.*')?}} "Offset + count out of range in span::subspan()"}}
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}
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// Offset + Count overflow templatized
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{
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[[maybe_unused]] auto s1 = sp.subspan<3, std::size_t(-2)>(); // expected-error-re@span:* {{static_assert failed{{( due to requirement '.*')?}} "Offset + count out of range in span::subspan()"}}, expected-error-re@span:* {{array is too large{{(.* elements)}}}}
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}
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return 0;
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}
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