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