| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 |
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| 10 | |
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| 11 | // <mdspan> |
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| 12 | |
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| 13 | // template<class Extents> |
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| 14 | // class layout_left::mapping; |
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| 15 | |
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| 16 | // If Extents is not a specialization of extents, then the program is |
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| 17 | // ill-formed. |
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| 18 | |
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| 19 | // Mandates: If Extents::rank_dynamic() == 0 is true, then the size of the |
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| 20 | // multidimensional index space Extents() is representable as a value of type |
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| 21 | // typename Extents::index_type. |
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| 22 | |
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| 23 | #include <mdspan> |
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| 24 | |
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| 25 | void not_extents() { |
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| 26 | // expected-error-re@*:* {{static assertion failed {{.*}}layout_left::mapping template argument must be a specialization of extents}} |
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| 27 | [[maybe_unused]] std::layout_left::mapping<void> mapping; |
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| 28 | } |
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| 29 | |
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| 30 | void representable() { |
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| 31 | // expected-error-re@*:* {{static assertion failed {{.*}}layout_left::mapping product of static extents must be representable as index_type.}} |
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| 32 | [[maybe_unused]] std::layout_left::mapping<std::extents<signed char, 20, 20>> mapping; |
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| 33 | } |
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| 34 | |
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