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501e3f2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | // -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCUDACXX___ITERATOR_PROJECTED_H
#define _LIBCUDACXX___ITERATOR_PROJECTED_H
#ifndef __cuda_std__
#include <__config>
#endif // __cuda_std__
#include "../__iterator/concepts.h"
#include "../__iterator/incrementable_traits.h"
#include "../__type_traits/enable_if.h"
#include "../__type_traits/remove_cvref.h"
#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 > 14
_LIBCUDACXX_TEMPLATE(class _It, class _Proj)
_LIBCUDACXX_REQUIRES( indirectly_readable<_It> _LIBCUDACXX_AND indirectly_regular_unary_invocable<_Proj, _It>)
struct projected {
using value_type = remove_cvref_t<indirect_result_t<_Proj&, _It>>;
_LIBCUDACXX_INLINE_VISIBILITY indirect_result_t<_Proj&, _It> operator*() const; // not defined
};
#if _LIBCUDACXX_STD_VER > 17
template<weakly_incrementable _It, class _Proj>
struct incrementable_traits<projected<_It, _Proj>> {
using difference_type = iter_difference_t<_It>;
};
#else
template<class _It, class _Proj>
struct incrementable_traits<projected<_It, _Proj>, enable_if_t<weakly_incrementable<_It>>> {
using difference_type = iter_difference_t<_It>;
};
#endif // _LIBCUDACXX_STD_VER > 17
#endif // _LIBCUDACXX_STD_VER > 14
_LIBCUDACXX_END_NAMESPACE_STD
#endif // _LIBCUDACXX___ITERATOR_PROJECTED_H
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