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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
// -*- 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___RANGES_EMPTY_H
#define _LIBCUDACXX___RANGES_EMPTY_H
#include <cuda/std/detail/__config>
#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
#include <cuda/std/__concepts/class_or_enum.h>
#include <cuda/std/__iterator/concepts.h>
#include <cuda/std/__ranges/access.h>
#include <cuda/std/__ranges/size.h>
#include <cuda/std/__cccl/prologue.h>
_LIBCUDACXX_BEGIN_NAMESPACE_RANGES
// [range.prim.empty]
_LIBCUDACXX_BEGIN_NAMESPACE_CPO(__empty)
#if _CCCL_HAS_CONCEPTS()
template <class _Tp>
concept __member_empty = __workaround_52970<_Tp> && requires(_Tp&& __t) { bool(__t.empty()); };
template <class _Tp>
concept __can_invoke_size = !__member_empty<_Tp> && requires(_Tp&& __t) { _CUDA_VRANGES::size(__t); };
template <class _Tp>
concept __can_compare_begin_end = !__member_empty<_Tp> && !__can_invoke_size<_Tp> && requires(_Tp&& __t) {
bool(_CUDA_VRANGES::begin(__t) == _CUDA_VRANGES::end(__t));
{ _CUDA_VRANGES::begin(__t) } -> forward_iterator;
};
#else // ^^^ _CCCL_HAS_CONCEPTS() ^^^ / vvv !_CCCL_HAS_CONCEPTS() vvv
template <class _Tp>
_CCCL_CONCEPT_FRAGMENT(__member_empty_, requires(_Tp&& __t)(requires(__workaround_52970<_Tp>), (bool(__t.empty()))));
template <class _Tp>
_CCCL_CONCEPT __member_empty = _CCCL_FRAGMENT(__member_empty_, _Tp);
template <class _Tp>
_CCCL_CONCEPT_FRAGMENT(__can_invoke_size_,
requires(_Tp&& __t)(requires(!__member_empty<_Tp>), ((void) _CUDA_VRANGES::size(__t))));
template <class _Tp>
_CCCL_CONCEPT __can_invoke_size = _CCCL_FRAGMENT(__can_invoke_size_, _Tp);
template <class _Tp>
_CCCL_CONCEPT_FRAGMENT(
__can_compare_begin_end_,
requires(_Tp&& __t)(requires(!__member_empty<_Tp>),
requires(!__can_invoke_size<_Tp>),
(bool(_CUDA_VRANGES::begin(__t) == _CUDA_VRANGES::end(__t))),
requires(forward_iterator<decltype(_CUDA_VRANGES::begin(__t))>)));
template <class _Tp>
_CCCL_CONCEPT __can_compare_begin_end = _CCCL_FRAGMENT(__can_compare_begin_end_, _Tp);
#endif // ^^^ !_CCCL_HAS_CONCEPTS() ^^^
struct __fn
{
_CCCL_TEMPLATE(class _Tp)
_CCCL_REQUIRES(__member_empty<_Tp>)
[[nodiscard]] _CCCL_API constexpr bool operator()(_Tp&& __t) const noexcept(noexcept(bool(__t.empty())))
{
return bool(__t.empty());
}
_CCCL_TEMPLATE(class _Tp)
_CCCL_REQUIRES(__can_invoke_size<_Tp>)
[[nodiscard]] _CCCL_API constexpr bool operator()(_Tp&& __t) const noexcept(noexcept(_CUDA_VRANGES::size(__t)))
{
return _CUDA_VRANGES::size(__t) == 0;
}
_CCCL_TEMPLATE(class _Tp)
_CCCL_REQUIRES(__can_compare_begin_end<_Tp>)
[[nodiscard]] _CCCL_API constexpr bool operator()(_Tp&& __t) const
noexcept(noexcept(bool(_CUDA_VRANGES::begin(__t) == _CUDA_VRANGES::end(__t))))
{
return _CUDA_VRANGES::begin(__t) == _CUDA_VRANGES::end(__t);
}
};
_LIBCUDACXX_END_NAMESPACE_CPO
inline namespace __cpo
{
_CCCL_GLOBAL_CONSTANT auto empty = __empty::__fn{};
} // namespace __cpo
_LIBCUDACXX_END_NAMESPACE_RANGES
#include <cuda/std/__cccl/epilogue.h>
#endif // _LIBCUDACXX___RANGES_EMPTY_H
|
