outstanding_work.hpp
21.7 KB
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
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
//
// execution/outstanding_work.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef ASIO_EXECUTION_OUTSTANDING_WORK_HPP
#define ASIO_EXECUTION_OUTSTANDING_WORK_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/config.hpp"
#include "asio/detail/type_traits.hpp"
#include "asio/execution/executor.hpp"
#include "asio/execution/scheduler.hpp"
#include "asio/execution/sender.hpp"
#include "asio/is_applicable_property.hpp"
#include "asio/query.hpp"
#include "asio/traits/query_free.hpp"
#include "asio/traits/query_member.hpp"
#include "asio/traits/query_static_constexpr_member.hpp"
#include "asio/traits/static_query.hpp"
#include "asio/traits/static_require.hpp"
#include "asio/detail/push_options.hpp"
namespace asio {
#if defined(GENERATING_DOCUMENTATION)
namespace execution {
/// A property to describe whether task submission is likely in the future.
struct outstanding_work_t
{
/// The outstanding_work_t property applies to executors, senders, and
/// schedulers.
template <typename T>
static constexpr bool is_applicable_property_v =
is_executor_v<T> || is_sender_v<T> || is_scheduler_v<T>;
/// The top-level outstanding_work_t property cannot be required.
static constexpr bool is_requirable = false;
/// The top-level outstanding_work_t property cannot be preferred.
static constexpr bool is_preferable = false;
/// The type returned by queries against an @c any_executor.
typedef outstanding_work_t polymorphic_query_result_type;
/// A sub-property that indicates that the executor does not represent likely
/// future submission of a function object.
struct untracked_t
{
/// The outstanding_work_t::untracked_t property applies to executors,
/// senders, and schedulers.
template <typename T>
static constexpr bool is_applicable_property_v =
is_executor_v<T> || is_sender_v<T> || is_scheduler_v<T>;
/// The outstanding_work_t::untracked_t property can be required.
static constexpr bool is_requirable = true;
/// The outstanding_work_t::untracked_t property can be preferred.
static constexpr bool is_preferable = true;
/// The type returned by queries against an @c any_executor.
typedef outstanding_work_t polymorphic_query_result_type;
/// Default constructor.
constexpr untracked_t();
/// Get the value associated with a property object.
/**
* @returns untracked_t();
*/
static constexpr outstanding_work_t value();
};
/// A sub-property that indicates that the executor represents likely
/// future submission of a function object.
struct tracked_t
{
/// The outstanding_work_t::untracked_t property applies to executors,
/// senders, and schedulers.
template <typename T>
static constexpr bool is_applicable_property_v =
is_executor_v<T> || is_sender_v<T> || is_scheduler_v<T>;
/// The outstanding_work_t::tracked_t property can be required.
static constexpr bool is_requirable = true;
/// The outstanding_work_t::tracked_t property can be preferred.
static constexpr bool is_preferable = true;
/// The type returned by queries against an @c any_executor.
typedef outstanding_work_t polymorphic_query_result_type;
/// Default constructor.
constexpr tracked_t();
/// Get the value associated with a property object.
/**
* @returns tracked_t();
*/
static constexpr outstanding_work_t value();
};
/// A special value used for accessing the outstanding_work_t::untracked_t
/// property.
static constexpr untracked_t untracked;
/// A special value used for accessing the outstanding_work_t::tracked_t
/// property.
static constexpr tracked_t tracked;
/// Default constructor.
constexpr outstanding_work_t();
/// Construct from a sub-property value.
constexpr outstanding_work_t(untracked_t);
/// Construct from a sub-property value.
constexpr outstanding_work_t(tracked_t);
/// Compare property values for equality.
friend constexpr bool operator==(
const outstanding_work_t& a, const outstanding_work_t& b) noexcept;
/// Compare property values for inequality.
friend constexpr bool operator!=(
const outstanding_work_t& a, const outstanding_work_t& b) noexcept;
};
/// A special value used for accessing the outstanding_work_t property.
constexpr outstanding_work_t outstanding_work;
} // namespace execution
#else // defined(GENERATING_DOCUMENTATION)
namespace execution {
namespace detail {
namespace outstanding_work {
template <int I> struct untracked_t;
template <int I> struct tracked_t;
} // namespace outstanding_work
template <int I = 0>
struct outstanding_work_t
{
#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
template <typename T>
ASIO_STATIC_CONSTEXPR(bool,
is_applicable_property_v = is_executor<T>::value
|| is_sender<T>::value || is_scheduler<T>::value);
#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
ASIO_STATIC_CONSTEXPR(bool, is_requirable = false);
ASIO_STATIC_CONSTEXPR(bool, is_preferable = false);
typedef outstanding_work_t polymorphic_query_result_type;
typedef detail::outstanding_work::untracked_t<I> untracked_t;
typedef detail::outstanding_work::tracked_t<I> tracked_t;
ASIO_CONSTEXPR outstanding_work_t()
: value_(-1)
{
}
ASIO_CONSTEXPR outstanding_work_t(untracked_t)
: value_(0)
{
}
ASIO_CONSTEXPR outstanding_work_t(tracked_t)
: value_(1)
{
}
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <typename T>
static ASIO_CONSTEXPR
typename traits::query_static_constexpr_member<
T, outstanding_work_t>::result_type
static_query()
ASIO_NOEXCEPT_IF((
traits::query_static_constexpr_member<
T, outstanding_work_t
>::is_noexcept))
{
return traits::query_static_constexpr_member<
T, outstanding_work_t>::value();
}
template <typename T>
static ASIO_CONSTEXPR
typename traits::static_query<T, untracked_t>::result_type
static_query(
typename enable_if<
!traits::query_static_constexpr_member<
T, outstanding_work_t>::is_valid
&& !traits::query_member<T, outstanding_work_t>::is_valid
&& traits::static_query<T, untracked_t>::is_valid
>::type* = 0) ASIO_NOEXCEPT
{
return traits::static_query<T, untracked_t>::value();
}
template <typename T>
static ASIO_CONSTEXPR
typename traits::static_query<T, tracked_t>::result_type
static_query(
typename enable_if<
!traits::query_static_constexpr_member<
T, outstanding_work_t>::is_valid
&& !traits::query_member<T, outstanding_work_t>::is_valid
&& !traits::static_query<T, untracked_t>::is_valid
&& traits::static_query<T, tracked_t>::is_valid
>::type* = 0) ASIO_NOEXCEPT
{
return traits::static_query<T, tracked_t>::value();
}
template <typename E,
typename T = decltype(outstanding_work_t::static_query<E>())>
static ASIO_CONSTEXPR const T static_query_v
= outstanding_work_t::static_query<E>();
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
friend ASIO_CONSTEXPR bool operator==(
const outstanding_work_t& a, const outstanding_work_t& b)
{
return a.value_ == b.value_;
}
friend ASIO_CONSTEXPR bool operator!=(
const outstanding_work_t& a, const outstanding_work_t& b)
{
return a.value_ != b.value_;
}
struct convertible_from_outstanding_work_t
{
ASIO_CONSTEXPR convertible_from_outstanding_work_t(outstanding_work_t)
{
}
};
template <typename Executor>
friend ASIO_CONSTEXPR outstanding_work_t query(
const Executor& ex, convertible_from_outstanding_work_t,
typename enable_if<
can_query<const Executor&, untracked_t>::value
>::type* = 0)
#if !defined(__clang__) // Clang crashes if noexcept is used here.
#if defined(ASIO_MSVC) // Visual C++ wants the type to be qualified.
ASIO_NOEXCEPT_IF((
is_nothrow_query<const Executor&,
outstanding_work_t<>::untracked_t>::value))
#else // defined(ASIO_MSVC)
ASIO_NOEXCEPT_IF((
is_nothrow_query<const Executor&, untracked_t>::value))
#endif // defined(ASIO_MSVC)
#endif // !defined(__clang__)
{
return asio::query(ex, untracked_t());
}
template <typename Executor>
friend ASIO_CONSTEXPR outstanding_work_t query(
const Executor& ex, convertible_from_outstanding_work_t,
typename enable_if<
!can_query<const Executor&, untracked_t>::value
&& can_query<const Executor&, tracked_t>::value
>::type* = 0)
#if !defined(__clang__) // Clang crashes if noexcept is used here.
#if defined(ASIO_MSVC) // Visual C++ wants the type to be qualified.
ASIO_NOEXCEPT_IF((
is_nothrow_query<const Executor&,
outstanding_work_t<>::tracked_t>::value))
#else // defined(ASIO_MSVC)
ASIO_NOEXCEPT_IF((
is_nothrow_query<const Executor&, tracked_t>::value))
#endif // defined(ASIO_MSVC)
#endif // !defined(__clang__)
{
return asio::query(ex, tracked_t());
}
ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(untracked_t, untracked);
ASIO_STATIC_CONSTEXPR_DEFAULT_INIT(tracked_t, tracked);
#if !defined(ASIO_HAS_CONSTEXPR)
static const outstanding_work_t instance;
#endif // !defined(ASIO_HAS_CONSTEXPR)
private:
int value_;
};
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <int I> template <typename E, typename T>
const T outstanding_work_t<I>::static_query_v;
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
#if !defined(ASIO_HAS_CONSTEXPR)
template <int I>
const outstanding_work_t<I> outstanding_work_t<I>::instance;
#endif
template <int I>
const typename outstanding_work_t<I>::untracked_t
outstanding_work_t<I>::untracked;
template <int I>
const typename outstanding_work_t<I>::tracked_t
outstanding_work_t<I>::tracked;
namespace outstanding_work {
template <int I = 0>
struct untracked_t
{
#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
template <typename T>
ASIO_STATIC_CONSTEXPR(bool,
is_applicable_property_v = is_executor<T>::value
|| is_sender<T>::value || is_scheduler<T>::value);
#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
ASIO_STATIC_CONSTEXPR(bool, is_requirable = true);
ASIO_STATIC_CONSTEXPR(bool, is_preferable = true);
typedef outstanding_work_t<I> polymorphic_query_result_type;
ASIO_CONSTEXPR untracked_t()
{
}
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <typename T>
static ASIO_CONSTEXPR
typename traits::query_static_constexpr_member<T, untracked_t>::result_type
static_query()
ASIO_NOEXCEPT_IF((
traits::query_static_constexpr_member<T, untracked_t>::is_noexcept))
{
return traits::query_static_constexpr_member<T, untracked_t>::value();
}
template <typename T>
static ASIO_CONSTEXPR untracked_t static_query(
typename enable_if<
!traits::query_static_constexpr_member<T, untracked_t>::is_valid
&& !traits::query_member<T, untracked_t>::is_valid
&& !traits::query_free<T, untracked_t>::is_valid
&& !can_query<T, tracked_t<I> >::value
>::type* = 0) ASIO_NOEXCEPT
{
return untracked_t();
}
template <typename E, typename T = decltype(untracked_t::static_query<E>())>
static ASIO_CONSTEXPR const T static_query_v
= untracked_t::static_query<E>();
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
static ASIO_CONSTEXPR outstanding_work_t<I> value()
{
return untracked_t();
}
friend ASIO_CONSTEXPR bool operator==(
const untracked_t&, const untracked_t&)
{
return true;
}
friend ASIO_CONSTEXPR bool operator!=(
const untracked_t&, const untracked_t&)
{
return false;
}
};
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <int I> template <typename E, typename T>
const T untracked_t<I>::static_query_v;
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <int I = 0>
struct tracked_t
{
#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
template <typename T>
ASIO_STATIC_CONSTEXPR(bool,
is_applicable_property_v = is_executor<T>::value
|| is_sender<T>::value || is_scheduler<T>::value);
#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
ASIO_STATIC_CONSTEXPR(bool, is_requirable = true);
ASIO_STATIC_CONSTEXPR(bool, is_preferable = true);
typedef outstanding_work_t<I> polymorphic_query_result_type;
ASIO_CONSTEXPR tracked_t()
{
}
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <typename T>
static ASIO_CONSTEXPR
typename traits::query_static_constexpr_member<T, tracked_t>::result_type
static_query()
ASIO_NOEXCEPT_IF((
traits::query_static_constexpr_member<T, tracked_t>::is_noexcept))
{
return traits::query_static_constexpr_member<T, tracked_t>::value();
}
template <typename E, typename T = decltype(tracked_t::static_query<E>())>
static ASIO_CONSTEXPR const T static_query_v
= tracked_t::static_query<E>();
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
static ASIO_CONSTEXPR outstanding_work_t<I> value()
{
return tracked_t();
}
friend ASIO_CONSTEXPR bool operator==(
const tracked_t&, const tracked_t&)
{
return true;
}
friend ASIO_CONSTEXPR bool operator!=(
const tracked_t&, const tracked_t&)
{
return false;
}
};
#if defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
&& defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <int I> template <typename E, typename T>
const T tracked_t<I>::static_query_v;
#endif // defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// && defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
} // namespace outstanding_work
} // namespace detail
typedef detail::outstanding_work_t<> outstanding_work_t;
#if defined(ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION)
constexpr outstanding_work_t outstanding_work;
#else // defined(ASIO_HAS_CONSTEXPR) || defined(GENERATING_DOCUMENTATION)
namespace { static const outstanding_work_t&
outstanding_work = outstanding_work_t::instance; }
#endif
} // namespace execution
#if !defined(ASIO_HAS_VARIABLE_TEMPLATES)
template <typename T>
struct is_applicable_property<T, execution::outstanding_work_t>
: integral_constant<bool,
execution::is_executor<T>::value
|| execution::is_sender<T>::value
|| execution::is_scheduler<T>::value>
{
};
template <typename T>
struct is_applicable_property<T, execution::outstanding_work_t::untracked_t>
: integral_constant<bool,
execution::is_executor<T>::value
|| execution::is_sender<T>::value
|| execution::is_scheduler<T>::value>
{
};
template <typename T>
struct is_applicable_property<T, execution::outstanding_work_t::tracked_t>
: integral_constant<bool,
execution::is_executor<T>::value
|| execution::is_sender<T>::value
|| execution::is_scheduler<T>::value>
{
};
#endif // !defined(ASIO_HAS_VARIABLE_TEMPLATES)
namespace traits {
#if !defined(ASIO_HAS_DEDUCED_QUERY_FREE_TRAIT)
template <typename T>
struct query_free_default<T, execution::outstanding_work_t,
typename enable_if<
can_query<T, execution::outstanding_work_t::untracked_t>::value
>::type>
{
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
(is_nothrow_query<T, execution::outstanding_work_t::untracked_t>::value));
typedef execution::outstanding_work_t result_type;
};
template <typename T>
struct query_free_default<T, execution::outstanding_work_t,
typename enable_if<
!can_query<T, execution::outstanding_work_t::untracked_t>::value
&& can_query<T, execution::outstanding_work_t::tracked_t>::value
>::type>
{
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
ASIO_STATIC_CONSTEXPR(bool, is_noexcept =
(is_nothrow_query<T, execution::outstanding_work_t::tracked_t>::value));
typedef execution::outstanding_work_t result_type;
};
#endif // !defined(ASIO_HAS_DEDUCED_QUERY_FREE_TRAIT)
#if !defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT) \
|| !defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
template <typename T>
struct static_query<T, execution::outstanding_work_t,
typename enable_if<
traits::query_static_constexpr_member<T,
execution::outstanding_work_t>::is_valid
>::type>
{
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
typedef typename traits::query_static_constexpr_member<T,
execution::outstanding_work_t>::result_type result_type;
static ASIO_CONSTEXPR result_type value()
{
return traits::query_static_constexpr_member<T,
execution::outstanding_work_t>::value();
}
};
template <typename T>
struct static_query<T, execution::outstanding_work_t,
typename enable_if<
!traits::query_static_constexpr_member<T,
execution::outstanding_work_t>::is_valid
&& !traits::query_member<T,
execution::outstanding_work_t>::is_valid
&& traits::static_query<T,
execution::outstanding_work_t::untracked_t>::is_valid
>::type>
{
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
typedef typename traits::static_query<T,
execution::outstanding_work_t::untracked_t>::result_type result_type;
static ASIO_CONSTEXPR result_type value()
{
return traits::static_query<T,
execution::outstanding_work_t::untracked_t>::value();
}
};
template <typename T>
struct static_query<T, execution::outstanding_work_t,
typename enable_if<
!traits::query_static_constexpr_member<T,
execution::outstanding_work_t>::is_valid
&& !traits::query_member<T,
execution::outstanding_work_t>::is_valid
&& !traits::static_query<T,
execution::outstanding_work_t::untracked_t>::is_valid
&& traits::static_query<T,
execution::outstanding_work_t::tracked_t>::is_valid
>::type>
{
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
typedef typename traits::static_query<T,
execution::outstanding_work_t::tracked_t>::result_type result_type;
static ASIO_CONSTEXPR result_type value()
{
return traits::static_query<T,
execution::outstanding_work_t::tracked_t>::value();
}
};
template <typename T>
struct static_query<T, execution::outstanding_work_t::untracked_t,
typename enable_if<
traits::query_static_constexpr_member<T,
execution::outstanding_work_t::untracked_t>::is_valid
>::type>
{
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
typedef typename traits::query_static_constexpr_member<T,
execution::outstanding_work_t::untracked_t>::result_type result_type;
static ASIO_CONSTEXPR result_type value()
{
return traits::query_static_constexpr_member<T,
execution::outstanding_work_t::untracked_t>::value();
}
};
template <typename T>
struct static_query<T, execution::outstanding_work_t::untracked_t,
typename enable_if<
!traits::query_static_constexpr_member<T,
execution::outstanding_work_t::untracked_t>::is_valid
&& !traits::query_member<T,
execution::outstanding_work_t::untracked_t>::is_valid
&& !traits::query_free<T,
execution::outstanding_work_t::untracked_t>::is_valid
&& !can_query<T, execution::outstanding_work_t::tracked_t>::value
>::type>
{
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
typedef execution::outstanding_work_t::untracked_t result_type;
static ASIO_CONSTEXPR result_type value()
{
return result_type();
}
};
template <typename T>
struct static_query<T, execution::outstanding_work_t::tracked_t,
typename enable_if<
traits::query_static_constexpr_member<T,
execution::outstanding_work_t::tracked_t>::is_valid
>::type>
{
ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
typedef typename traits::query_static_constexpr_member<T,
execution::outstanding_work_t::tracked_t>::result_type result_type;
static ASIO_CONSTEXPR result_type value()
{
return traits::query_static_constexpr_member<T,
execution::outstanding_work_t::tracked_t>::value();
}
};
#endif // !defined(ASIO_HAS_DEDUCED_STATIC_QUERY_TRAIT)
// || !defined(ASIO_HAS_SFINAE_VARIABLE_TEMPLATES)
#if !defined(ASIO_HAS_DEDUCED_STATIC_REQUIRE_TRAIT)
template <typename T>
struct static_require<T, execution::outstanding_work_t::untracked_t,
typename enable_if<
static_query<T, execution::outstanding_work_t::untracked_t>::is_valid
>::type>
{
ASIO_STATIC_CONSTEXPR(bool, is_valid =
(is_same<typename static_query<T,
execution::outstanding_work_t::untracked_t>::result_type,
execution::outstanding_work_t::untracked_t>::value));
};
template <typename T>
struct static_require<T, execution::outstanding_work_t::tracked_t,
typename enable_if<
static_query<T, execution::outstanding_work_t::tracked_t>::is_valid
>::type>
{
ASIO_STATIC_CONSTEXPR(bool, is_valid =
(is_same<typename static_query<T,
execution::outstanding_work_t::tracked_t>::result_type,
execution::outstanding_work_t::tracked_t>::value));
};
#endif // !defined(ASIO_HAS_DEDUCED_STATIC_REQUIRE_TRAIT)
} // namespace traits
#endif // defined(GENERATING_DOCUMENTATION)
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // ASIO_EXECUTION_OUTSTANDING_WORK_HPP