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//@HEADER
// ************************************************************************
//
// Kokkos v. 2.0
// Copyright (2019) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
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// Questions? Contact Christian R. Trott (crtrott@sandia.gov)
//
// ************************************************************************
//@HEADER
*/
#ifndef _LIBCUDACXX___MDSPAN_DEFAULT_ACCESSOR_HPP
#define _LIBCUDACXX___MDSPAN_DEFAULT_ACCESSOR_HPP
#ifndef __cuda_std__
#include <__config>
#endif // __cuda_std__
#include "../__mdspan/macros.h"
#include "../__type_traits/is_convertible.h"
#include "../cstddef"
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
_LIBCUDACXX_BEGIN_NAMESPACE_STD
#if _LIBCUDACXX_STD_VER > 11
template <class _ElementType>
struct default_accessor {
using offset_policy = default_accessor;
using element_type = _ElementType;
using reference = _ElementType&;
using data_handle_type = _ElementType*;
__MDSPAN_INLINE_FUNCTION_DEFAULTED constexpr default_accessor() noexcept = default;
__MDSPAN_TEMPLATE_REQUIRES(
class _OtherElementType,
/* requires */ (
_LIBCUDACXX_TRAIT(is_convertible, _OtherElementType(*)[], element_type(*)[])
)
)
__MDSPAN_INLINE_FUNCTION
constexpr default_accessor(default_accessor<_OtherElementType>) noexcept {}
__MDSPAN_INLINE_FUNCTION
constexpr data_handle_type
offset(data_handle_type __p, size_t __i) const noexcept {
return __p + __i;
}
__MDSPAN_FORCE_INLINE_FUNCTION
constexpr reference access(data_handle_type __p, size_t __i) const noexcept {
return __p[__i];
}
};
#endif // _LIBCUDACXX_STD_VER > 11
_LIBCUDACXX_END_NAMESPACE_STD
#endif // _LIBCUDACXX___MDSPAN_DEFAULT_ACCESSOR_HPP
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