1*06c3fb27SDimitry Andric // -*- C++ -*- 2*06c3fb27SDimitry Andric //===----------------------------------------------------------------------===// 3*06c3fb27SDimitry Andric // 4*06c3fb27SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5*06c3fb27SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 6*06c3fb27SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7*06c3fb27SDimitry Andric // 8*06c3fb27SDimitry Andric // Kokkos v. 4.0 9*06c3fb27SDimitry Andric // Copyright (2022) National Technology & Engineering 10*06c3fb27SDimitry Andric // Solutions of Sandia, LLC (NTESS). 11*06c3fb27SDimitry Andric // 12*06c3fb27SDimitry Andric // Under the terms of Contract DE-NA0003525 with NTESS, 13*06c3fb27SDimitry Andric // the U.S. Government retains certain rights in this software. 14*06c3fb27SDimitry Andric // 15*06c3fb27SDimitry Andric //===---------------------------------------------------------------------===// 16*06c3fb27SDimitry Andric 17*06c3fb27SDimitry Andric #ifndef _LIBCPP___MDSPAN_DEFAULT_ACCESSOR_H 18*06c3fb27SDimitry Andric #define _LIBCPP___MDSPAN_DEFAULT_ACCESSOR_H 19*06c3fb27SDimitry Andric 20*06c3fb27SDimitry Andric #include <__config> 21*06c3fb27SDimitry Andric #include <__type_traits/is_abstract.h> 22*06c3fb27SDimitry Andric #include <__type_traits/is_array.h> 23*06c3fb27SDimitry Andric #include <__type_traits/is_convertible.h> 24*06c3fb27SDimitry Andric #include <__type_traits/remove_const.h> 25*06c3fb27SDimitry Andric #include <cinttypes> 26*06c3fb27SDimitry Andric #include <cstddef> 27*06c3fb27SDimitry Andric 28*06c3fb27SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 29*06c3fb27SDimitry Andric # pragma GCC system_header 30*06c3fb27SDimitry Andric #endif 31*06c3fb27SDimitry Andric 32*06c3fb27SDimitry Andric _LIBCPP_PUSH_MACROS 33*06c3fb27SDimitry Andric #include <__undef_macros> 34*06c3fb27SDimitry Andric 35*06c3fb27SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 36*06c3fb27SDimitry Andric 37*06c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 23 38*06c3fb27SDimitry Andric 39*06c3fb27SDimitry Andric template <class _ElementType> 40*06c3fb27SDimitry Andric struct default_accessor { 41*06c3fb27SDimitry Andric static_assert(!is_array_v<_ElementType>, "default_accessor: template argument may not be an array type"); 42*06c3fb27SDimitry Andric static_assert(!is_abstract_v<_ElementType>, "default_accessor: template argument may not be an abstract class"); 43*06c3fb27SDimitry Andric 44*06c3fb27SDimitry Andric using offset_policy = default_accessor; 45*06c3fb27SDimitry Andric using element_type = _ElementType; 46*06c3fb27SDimitry Andric using reference = _ElementType&; 47*06c3fb27SDimitry Andric using data_handle_type = _ElementType*; 48*06c3fb27SDimitry Andric 49*06c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr default_accessor() noexcept = default; 50*06c3fb27SDimitry Andric template <class _OtherElementType> requiresdefault_accessor51*06c3fb27SDimitry Andric requires(is_convertible_v<_OtherElementType (*)[], element_type (*)[]>) 52*06c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr default_accessor(default_accessor<_OtherElementType>) noexcept {} 53*06c3fb27SDimitry Andric accessdefault_accessor54*06c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr reference access(data_handle_type __p, size_t __i) const noexcept { return __p[__i]; } offsetdefault_accessor55*06c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr data_handle_type offset(data_handle_type __p, size_t __i) const noexcept { 56*06c3fb27SDimitry Andric return __p + __i; 57*06c3fb27SDimitry Andric } 58*06c3fb27SDimitry Andric }; 59*06c3fb27SDimitry Andric 60*06c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 23 61*06c3fb27SDimitry Andric 62*06c3fb27SDimitry Andric _LIBCPP_END_NAMESPACE_STD 63*06c3fb27SDimitry Andric 64*06c3fb27SDimitry Andric _LIBCPP_POP_MACROS 65*06c3fb27SDimitry Andric 66*06c3fb27SDimitry Andric #endif // _LIBCPP___MDSPAN_DEFAULT_ACCESSOR_H 67