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
25void not_extents() {
26 // expected-error-re@*:* {{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
30void representable() {
31 // expected-error-re@*:* {{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<signed char, 20, 20>> mapping;
33}
34

source code of libcxx/test/std/containers/views/mdspan/layout_right/extents.verify.cpp