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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
|
// -*- 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
//
// Kokkos v. 4.0
// Copyright (2022) National Technology & Engineering
// Solutions of Sandia, LLC (NTESS).
//
// Under the terms of Contract DE-NA0003525 with NTESS,
// the U.S. Government retains certain rights in this software.
//
//===---------------------------------------------------------------------===//
#ifndef TEST_STD_CONTAINERS_VIEWS_MDSPAN_MDSPAN_CUSTOM_TEST_ACCESSORS_H
#define TEST_STD_CONTAINERS_VIEWS_MDSPAN_MDSPAN_CUSTOM_TEST_ACCESSORS_H
#include <mdspan>
#include <type_traits>
#include <cassert>
// This contains a bunch of accessors and handles which have different properties
// regarding constructibility and convertibility in order to test mdspan constraints
// non default constructible data handle
template <class T>
struct no_default_ctor_handle {
T* ptr;
no_default_ctor_handle() = delete;
constexpr no_default_ctor_handle(T* ptr_) : ptr(ptr_) {}
};
// handle that can't convert from T to const T
template <class T>
struct not_const_convertible_handle {
T* ptr;
constexpr not_const_convertible_handle() : ptr(nullptr) {}
constexpr not_const_convertible_handle(T* ptr_) : ptr(ptr_) {}
constexpr T& operator[](size_t i) const { return ptr[i]; }
};
// handle where move has side effects
template <class T>
struct move_counted_handle {
T* ptr;
constexpr move_counted_handle() = default;
constexpr move_counted_handle(const move_counted_handle&) = default;
template <class OtherT>
requires(std::is_constructible_v<T*, OtherT*>)
constexpr move_counted_handle(const move_counted_handle<OtherT>& other) : ptr(other.ptr) {}
constexpr move_counted_handle(move_counted_handle&& other) {
ptr = other.ptr;
if (!std::is_constant_evaluated()) {
move_counter()++;
}
}
constexpr move_counted_handle(T* ptr_) : ptr(ptr_) {}
constexpr move_counted_handle& operator=(const move_counted_handle&) = default;
constexpr T& operator[](size_t i) const { return ptr[i]; }
static int& move_counter() {
static int c = 0;
return c;
}
};
// non-default constructible accessor with a bunch of different data handles
template <class ElementType>
struct checked_accessor {
size_t N;
using offset_policy = std::default_accessor<ElementType>;
using element_type = ElementType;
using reference = ElementType&;
using data_handle_type = move_counted_handle<ElementType>;
constexpr checked_accessor(size_t N_) : N(N_) {}
template <class OtherElementType>
requires(std::is_convertible_v<OtherElementType (*)[], element_type (*)[]>)
explicit constexpr checked_accessor(const checked_accessor<OtherElementType>& other) noexcept {
N = other.N;
}
constexpr reference access(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return p[i];
}
constexpr data_handle_type offset(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return data_handle_type(p.ptr + i);
}
};
static_assert(std::is_constructible_v<checked_accessor<const int>, const checked_accessor<int>&>);
static_assert(!std::is_convertible_v<const checked_accessor<int>&, checked_accessor<const int>>);
template <>
struct checked_accessor<double> {
size_t N;
using offset_policy = std::default_accessor<double>;
using element_type = double;
using reference = double&;
using data_handle_type = no_default_ctor_handle<double>;
constexpr checked_accessor(size_t N_) : N(N_) {}
template <class OtherElementType>
requires(std::is_convertible_v<OtherElementType (*)[], element_type (*)[]>)
constexpr checked_accessor(checked_accessor<OtherElementType>&& other) noexcept {
N = other.N;
}
constexpr reference access(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return p.ptr[i];
}
constexpr data_handle_type offset(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return p.ptr + i;
}
};
template <>
struct checked_accessor<unsigned> {
size_t N;
using offset_policy = std::default_accessor<unsigned>;
using element_type = unsigned;
using reference = unsigned;
using data_handle_type = not_const_convertible_handle<unsigned>;
constexpr checked_accessor() : N(0) {}
constexpr checked_accessor(size_t N_) : N(N_) {}
constexpr checked_accessor(const checked_accessor& acc) : N(acc.N) {}
constexpr reference access(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return p[i];
}
constexpr auto offset(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return p.ptr + i;
}
};
template <>
struct checked_accessor<const unsigned> {
size_t N;
using offset_policy = std::default_accessor<const unsigned>;
using element_type = const unsigned;
using reference = unsigned;
using data_handle_type = not_const_convertible_handle<const unsigned>;
constexpr checked_accessor() : N(0) {}
constexpr checked_accessor(size_t N_) : N(N_) {}
constexpr checked_accessor(const checked_accessor& acc) : N(acc.N) {}
template <class OtherACC>
constexpr explicit(std::is_const_v<OtherACC>) checked_accessor(OtherACC&& acc) : N(acc.N) {}
constexpr reference access(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return p[i];
}
constexpr auto offset(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return p.ptr + i;
}
};
template <>
struct checked_accessor<const float> {
size_t N;
using offset_policy = std::default_accessor<const float>;
using element_type = const float;
using reference = const float&;
using data_handle_type = move_counted_handle<const float>;
constexpr checked_accessor() : N(0) {}
constexpr checked_accessor(size_t N_) : N(N_) {}
constexpr checked_accessor(const checked_accessor& acc) : N(acc.N) {}
constexpr checked_accessor(checked_accessor<float>&& acc) : N(acc.N) {}
constexpr reference access(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return p[i];
}
constexpr data_handle_type offset(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return data_handle_type(p.ptr + i);
}
};
template <>
struct checked_accessor<const double> {
size_t N;
using offset_policy = std::default_accessor<const double>;
using element_type = const double;
using reference = const double&;
using data_handle_type = move_counted_handle<const double>;
constexpr checked_accessor() : N(0) {}
constexpr checked_accessor(size_t N_) : N(N_) {}
constexpr checked_accessor(const checked_accessor& acc) : N(acc.N) {}
constexpr reference access(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return p[i];
}
constexpr data_handle_type offset(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return data_handle_type(p.ptr + i);
}
};
// Data handle pair which has configurable conversion properties
// bool template parameters are used to enable/disable ctors and assignment
// the c is the one for const T the nc for non-const (so we can convert mdspan)
// Note both take non-const T as template parameter though
template <class T, bool, bool, bool, bool>
struct conv_test_accessor_c;
template <class T, bool conv_c, bool conv_nc>
struct conv_test_accessor_nc {
using offset_policy = std::default_accessor<T>;
using element_type = T;
using reference = T&;
using data_handle_type = T*;
constexpr conv_test_accessor_nc() = default;
constexpr conv_test_accessor_nc(const conv_test_accessor_nc&) = default;
template <bool b1, bool b2, bool b3, bool b4>
constexpr operator conv_test_accessor_c<T, b1, b2, b3, b4>()
requires(conv_nc)
{
return conv_test_accessor_c<T, b1, b2, b3, b4>{};
}
template <bool b1, bool b2, bool b3, bool b4>
constexpr operator conv_test_accessor_c<T, b1, b2, b3, b4>() const
requires(conv_c)
{
return conv_test_accessor_c<T, b1, b2, b3, b4>{};
}
constexpr reference access(data_handle_type p, size_t i) const noexcept { return p[i]; }
constexpr data_handle_type offset(data_handle_type p, size_t i) const noexcept { return p + i; }
};
template <class T, bool ctor_c, bool ctor_mv, bool assign_c, bool assign_mv>
struct conv_test_accessor_c {
using offset_policy = std::default_accessor<const T>;
using element_type = const T;
using reference = const T&;
using data_handle_type = const T*;
constexpr conv_test_accessor_c() = default;
constexpr conv_test_accessor_c(const conv_test_accessor_c&) = default;
template <bool b1, bool b2>
constexpr conv_test_accessor_c(const conv_test_accessor_nc<T, b1, b2>&)
requires(ctor_c)
{}
template <bool b1, bool b2>
constexpr conv_test_accessor_c(conv_test_accessor_nc<T, b1, b2>&&)
requires(ctor_mv)
{}
template <bool b1, bool b2>
constexpr conv_test_accessor_c& operator=(const conv_test_accessor_nc<T, b1, b2>&)
requires(assign_c)
{
return {};
}
template <bool b1, bool b2>
constexpr conv_test_accessor_c& operator=(conv_test_accessor_nc<T, b1, b2>&&)
requires(assign_mv)
{
return {};
}
constexpr reference access(data_handle_type p, size_t i) const noexcept { return p[i]; }
constexpr data_handle_type offset(data_handle_type p, size_t i) const noexcept { return p + i; }
};
template <class ElementType>
struct convertible_accessor_but_not_handle {
size_t N;
using offset_policy = std::default_accessor<ElementType>;
using element_type = ElementType;
using reference = ElementType&;
using data_handle_type = not_const_convertible_handle<element_type>;
constexpr convertible_accessor_but_not_handle() = default;
template <class OtherElementType>
requires(std::is_convertible_v<OtherElementType (*)[], element_type (*)[]>)
explicit constexpr convertible_accessor_but_not_handle(
const convertible_accessor_but_not_handle<OtherElementType>& other) noexcept {
N = other.N;
}
constexpr reference access(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return p[i];
}
constexpr data_handle_type offset(data_handle_type p, size_t i) const noexcept {
assert(i < N);
return data_handle_type(p.ptr + i);
}
};
#endif // TEST_STD_CONTAINERS_VIEWS_MDSPAN_MDSPAN_CUSTOM_TEST_ACCESSORS_H
|
