1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 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 7 // 8 // Kokkos v. 4.0 9 // Copyright (2022) National Technology & Engineering 10 // Solutions of Sandia, LLC (NTESS). 11 // 12 // Under the terms of Contract DE-NA0003525 with NTESS, 13 // the U.S. Government retains certain rights in this software. 14 // 15 //===---------------------------------------------------------------------===// 16 17 #ifndef _LIBCPP___MDSPAN_LAYOUTS_H 18 #define _LIBCPP___MDSPAN_LAYOUTS_H 19 20 #include <__config> 21 22 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 23 # pragma GCC system_header 24 #endif 25 26 _LIBCPP_PUSH_MACROS 27 #include <__undef_macros> 28 29 _LIBCPP_BEGIN_NAMESPACE_STD 30 31 #if _LIBCPP_STD_VER >= 23 32 33 // Layout policy with a mapping which corresponds to FORTRAN-style array layouts 34 struct layout_left { 35 template <class _Extents> 36 class mapping; 37 }; 38 39 // Layout policy with a mapping which corresponds to C-style array layouts 40 struct layout_right { 41 template <class _Extents> 42 class mapping; 43 }; 44 45 /* 46 // Will be implemented with follow on revision 47 // Layout policy with a unique mapping where strides are arbitrary 48 struct layout_stride { 49 template<class Extents> 50 class mapping; 51 }; 52 */ 53 54 #endif // _LIBCPP_STD_VER >= 23 55 56 _LIBCPP_END_NAMESPACE_STD 57 58 _LIBCPP_POP_MACROS 59 60 #endif // _LIBCPP___MDSPAN_LAYOUTS_H 61