2 //===----------------------------------------------------------------------===//
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
8 //===----------------------------------------------------------------------===//
10 export namespace std {
11 #if _LIBCPP_STD_VER >= 23
12 // [mdspan.extents], class template extents
15 // [mdspan.extents.dextents], alias template dextents
18 // [mdspan.layout], layout mapping
19 using std::layout_left;
20 using std::layout_right;
21 using std::layout_stride;
23 // [mdspan.accessor.default], class template default_accessor
24 using std::default_accessor;
26 // [mdspan.mdspan], class template mdspan
28 #endif // _LIBCPP_STD_VER >= 23