f0dfe682bc
`_LIBCPP_ENABLE_ASSERTIONS` was used to enable the "safe" mode in libc++. Libc++ now provides the hardened mode and the debug mode that replace the safe mode. For backward compatibility, enabling `_LIBCPP_ENABLE_ASSERTIONS` now enables the hardened mode. Note that the hardened mode provides a narrower set of checks than the previous "safe" mode (only security-critical checks that are performant enough to be used in production). Differential Revision: https://reviews.llvm.org/D154997
60 lines
2.3 KiB
C++
60 lines
2.3 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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// REQUIRES: has-unix-headers
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// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
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// UNSUPPORTED: !libcpp-has-hardened-mode && !libcpp-has-debug-mode
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// XFAIL: availability-verbose_abort-missing
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// <mdspan>
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// template<class OtherExtents>
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// constexpr explicit(!is_convertible_v<OtherExtents, extents_type>)
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// mapping(const mapping<OtherExtents>&) noexcept;
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// Constraints: is_constructible_v<extents_type, OtherExtents> is true.
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//
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// Preconditions: other.required_span_size() is representable as a value of type index_type.
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#include <mdspan>
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#include <cassert>
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#include "check_assertion.h"
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int main(int, char**) {
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constexpr size_t D = std::dynamic_extent;
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std::extents<int, D, D> arg_exts{100, 5};
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std::layout_left::mapping<std::extents<int, D, D>> arg(arg_exts);
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// working case
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{
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[[maybe_unused]] std::layout_left::mapping<std::extents<size_t, D, 5>> m(arg); // should work
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}
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// mismatch of static extent
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{
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TEST_LIBCPP_ASSERT_FAILURE(([=] { std::layout_left::mapping<std::extents<int, D, 3>> m(arg); }()),
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"extents construction: mismatch of provided arguments with static extents.");
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}
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// non-representability of extents itself
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{
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TEST_LIBCPP_ASSERT_FAILURE(([=] { std::layout_left::mapping<std::extents<char, D>> m(
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std::layout_left::mapping<std::extents<int, D>>(std::extents<int, D>(500))); }()),
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"extents ctor: arguments must be representable as index_type and nonnegative");
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}
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// required_span_size not representable, while individual extents are
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{
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// check extents would be constructible
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[[maybe_unused]] std::extents<char, D, 5> e(arg_exts);
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// but the product is not, so we can't use it for layout_left
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TEST_LIBCPP_ASSERT_FAILURE(
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([=] { std::layout_left::template mapping<std::extents<char, D, 5>> m(arg); }()),
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"layout_left::mapping converting ctor: other.required_span_size() must be representable as index_type.");
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}
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return 0;
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}
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