xref: /freebsd/contrib/llvm-project/libcxx/include/experimental/propagate_const (revision 43e29d03f416d7dda52112a29600a7c82ee1a91e) 
1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP_EXPERIMENTAL_PROPAGATE_CONST
11#define _LIBCPP_EXPERIMENTAL_PROPAGATE_CONST
12
13/*
14    propagate_const synopsis
15
16    namespace std { namespace experimental { inline namespace fundamentals_v2 {
17
18    // [propagate_const]
19    template <class T> class propagate_const;
20
21    // [propagate_const.underlying], underlying pointer access
22    constexpr const _Tp& _VSTD_LFTS_V2::get_underlying(const propagate_const<T>& pt) noexcept;
23    constexpr T& _VSTD_LFTS_V2::get_underlying(propagate_const<T>& pt) noexcept;
24
25    // [propagate_const.relational], relational operators
26    template <class T> constexpr bool operator==(const propagate_const<T>& pt, nullptr_t);
27    template <class T> constexpr bool operator==(nullptr_t, const propagate_const<T>& pu);
28    template <class T> constexpr bool operator!=(const propagate_const<T>& pt, nullptr_t);
29    template <class T> constexpr bool operator!=(nullptr_t, const propagate_const<T>& pu);
30    template <class T, class U> constexpr bool operator==(const propagate_const<T>& pt, const propagate_const<_Up>& pu);
31    template <class T, class U> constexpr bool operator!=(const propagate_const<T>& pt, const propagate_const<_Up>& pu);
32    template <class T, class U> constexpr bool operator<(const propagate_const<T>& pt, const propagate_const<_Up>& pu);
33    template <class T, class U> constexpr bool operator>(const propagate_const<T>& pt, const propagate_const<_Up>& pu);
34    template <class T, class U> constexpr bool operator<=(const propagate_const<T>& pt, const propagate_const<_Up>& pu);
35    template <class T, class U> constexpr bool operator>=(const propagate_const<T>& pt, const propagate_const<_Up>& pu);
36    template <class T, class U> constexpr bool operator==(const propagate_const<T>& pt, const _Up& u);
37    template <class T, class U> constexpr bool operator!=(const propagate_const<T>& pt, const _Up& u);
38    template <class T, class U> constexpr bool operator<(const propagate_const<T>& pt, const _Up& u);
39    template <class T, class U> constexpr bool operator>(const propagate_const<T>& pt, const _Up& u);
40    template <class T, class U> constexpr bool operator<=(const propagate_const<T>& pt, const _Up& u);
41    template <class T, class U> constexpr bool operator>=(const propagate_const<T>& pt, const _Up& u);
42    template <class T, class U> constexpr bool operator==(const _Tp& t, const propagate_const<_Up>& pu);
43    template <class T, class U> constexpr bool operator!=(const _Tp& t, const propagate_const<_Up>& pu);
44    template <class T, class U> constexpr bool operator<(const _Tp& t, const propagate_const<_Up>& pu);
45    template <class T, class U> constexpr bool operator>(const _Tp& t, const propagate_const<_Up>& pu);
46    template <class T, class U> constexpr bool operator<=(const _Tp& t, const propagate_const<_Up>& pu);
47    template <class T, class U> constexpr bool operator>=(const _Tp& t, const propagate_const<_Up>& pu);
48
49    // [propagate_const.algorithms], specialized algorithms
50    template <class T> constexpr void swap(propagate_const<T>& pt, propagate_const<T>& pu) noexcept(see below);
51
52    template <class T>
53    class propagate_const
54    {
55
56    public:
57      typedef remove_reference_t<decltype(*declval<T&>())> element_type;
58
59      // [propagate_const.ctor], constructors
60      constexpr propagate_const() = default;
61      propagate_const(const propagate_const& p) = delete;
62      constexpr propagate_const(propagate_const&& p) = default;
63      template <class U> EXPLICIT constexpr propagate_const(propagate_const<_Up>&& pu); // see below
64      template <class U> EXPLICIT constexpr propagate_const(U&& u); // see below
65
66      // [propagate_const.assignment], assignment
67      propagate_const& operator=(const propagate_const& p) = delete;
68      constexpr propagate_const& operator=(propagate_const&& p) = default;
69      template <class U> constexpr propagate_const& operator=(propagate_const<_Up>&& pu);
70      template <class U> constexpr propagate_const& operator=(U&& u); // see below
71
72      // [propagate_const.const_observers], const observers
73      explicit constexpr operator bool() const;
74      constexpr const element_type* operator->() const;
75      constexpr operator const element_type*() const; // Not always defined
76      constexpr const element_type& operator*() const;
77      constexpr const element_type* get() const;
78
79      // [propagate_const.non_const_observers], non-const observers
80      constexpr element_type* operator->();
81      constexpr operator element_type*(); // Not always defined
82      constexpr element_type& operator*();
83      constexpr element_type* get();
84
85      // [propagate_const.modifiers], modifiers
86      constexpr void swap(propagate_const& pt) noexcept(see below)
87
88    private:
89      T t_; // exposition only
90    };
91
92  } // namespace fundamentals_v2
93  } // namespace experimental
94
95  // [propagate_const.hash], hash support
96  template <class T> struct hash<experimental::fundamentals_v2::propagate_const<T>>;
97
98  // [propagate_const.comparison_function_objects], comparison function objects
99  template <class T> struct equal_to<experimental::fundamentals_v2::propagate_const<T>>;
100  template <class T> struct not_equal_to<experimental::fundamentals_v2::propagate_const<T>>;
101  template <class T> struct less<experimental::fundamentals_v2::propagate_const<T>>;
102  template <class T> struct greater<experimental::fundamentals_v2::propagate_const<T>>;
103  template <class T> struct less_equal<experimental::fundamentals_v2::propagate_const<T>>;
104  template <class T> struct greater_equal<experimental::fundamentals_v2::propagate_const<T>>;
105
106} // namespace std
107
108*/
109
110#include <__assert> // all public C++ headers provide the assertion handler
111#include <__functional/operations.h>
112#include <__fwd/hash.h>
113#include <__utility/forward.h>
114#include <__utility/move.h>
115#include <__utility/swap.h>
116#include <experimental/__config>
117#include <type_traits>
118
119#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
120#  pragma GCC system_header
121#endif
122
123#if _LIBCPP_STD_VER > 11
124
125_LIBCPP_BEGIN_NAMESPACE_LFTS_V2
126
127template <class _Tp>
128class propagate_const;
129
130template <class _Up>
131inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
132const _Up& get_underlying(const propagate_const<_Up>& __pu) _NOEXCEPT;
133
134template <class _Up>
135inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
136_Up& get_underlying(propagate_const<_Up>& __pu) _NOEXCEPT;
137
138template <class _Tp>
139class propagate_const
140{
141public:
142  typedef remove_reference_t<decltype(*std::declval<_Tp&>())> element_type;
143
144  static_assert(!is_array<_Tp>::value,
145      "Instantiation of propagate_const with an array type is ill-formed.");
146  static_assert(!is_reference<_Tp>::value,
147      "Instantiation of propagate_const with a reference type is ill-formed.");
148  static_assert(!(is_pointer<_Tp>::value && is_function<__remove_pointer_t<_Tp> >::value),
149      "Instantiation of propagate_const with a function-pointer type is ill-formed.");
150  static_assert(!(is_pointer<_Tp>::value && is_same<__remove_cv_t<__remove_pointer_t<_Tp> >, void>::value),
151      "Instantiation of propagate_const with a pointer to (possibly cv-qualified) void is ill-formed.");
152
153private:
154  template <class _Up>
155  static _LIBCPP_CONSTEXPR element_type* __get_pointer(_Up* __u)
156  {
157    return __u;
158  }
159
160  template <class _Up>
161  static _LIBCPP_CONSTEXPR element_type* __get_pointer(_Up& __u)
162  {
163    return __get_pointer(__u.get());
164  }
165
166  template <class _Up>
167  static _LIBCPP_CONSTEXPR const element_type* __get_pointer(const _Up* __u)
168  {
169    return __u;
170  }
171
172  template <class _Up>
173  static _LIBCPP_CONSTEXPR const element_type* __get_pointer(const _Up& __u)
174  {
175    return __get_pointer(__u.get());
176  }
177
178  template <class _Up>
179  struct __is_propagate_const : false_type
180  {
181  };
182
183  template <class _Up>
184  struct __is_propagate_const<propagate_const<_Up>> : true_type
185  {
186  };
187
188  _Tp __t_;
189
190public:
191
192  template <class _Up> friend _LIBCPP_CONSTEXPR const _Up& ::_VSTD_LFTS_V2::get_underlying(const propagate_const<_Up>& __pu) _NOEXCEPT;
193  template <class _Up> friend _LIBCPP_CONSTEXPR _Up& ::_VSTD_LFTS_V2::get_underlying(propagate_const<_Up>& __pu) _NOEXCEPT;
194
195  _LIBCPP_CONSTEXPR propagate_const() = default;
196
197  propagate_const(const propagate_const&) = delete;
198
199  _LIBCPP_CONSTEXPR propagate_const(propagate_const&&) = default;
200
201  template <class _Up, enable_if_t<!is_convertible<_Up, _Tp>::value &&
202                                 is_constructible<_Tp, _Up&&>::value,bool> = true>
203  explicit _LIBCPP_CONSTEXPR propagate_const(propagate_const<_Up>&& __pu)
204      : __t_(std::move(_VSTD_LFTS_V2::get_underlying(__pu)))
205  {
206  }
207
208  template <class _Up, enable_if_t<is_convertible<_Up&&, _Tp>::value &&
209                                 is_constructible<_Tp, _Up&&>::value,bool> = false>
210  _LIBCPP_CONSTEXPR propagate_const(propagate_const<_Up>&& __pu)
211      : __t_(std::move(_VSTD_LFTS_V2::get_underlying(__pu)))
212  {
213  }
214
215  template <class _Up, enable_if_t<!is_convertible<_Up&&, _Tp>::value &&
216                                 is_constructible<_Tp, _Up&&>::value &&
217                                 !__is_propagate_const<decay_t<_Up>>::value,bool> = true>
218  explicit _LIBCPP_CONSTEXPR propagate_const(_Up&& __u)
219      : __t_(std::forward<_Up>(__u))
220  {
221  }
222
223  template <class _Up, enable_if_t<is_convertible<_Up&&, _Tp>::value &&
224                                 is_constructible<_Tp, _Up&&>::value &&
225                                 !__is_propagate_const<decay_t<_Up>>::value,bool> = false>
226  _LIBCPP_CONSTEXPR propagate_const(_Up&& __u)
227      : __t_(std::forward<_Up>(__u))
228  {
229  }
230
231  propagate_const& operator=(const propagate_const&) = delete;
232
233  _LIBCPP_CONSTEXPR propagate_const& operator=(propagate_const&&) = default;
234
235  template <class _Up>
236  _LIBCPP_CONSTEXPR propagate_const& operator=(propagate_const<_Up>&& __pu)
237  {
238    __t_ = std::move(_VSTD_LFTS_V2::get_underlying(__pu));
239    return *this;
240  }
241
242  template <class _Up, class _Vp = enable_if_t<!__is_propagate_const<decay_t<_Up>>::value>>
243  _LIBCPP_CONSTEXPR propagate_const& operator=(_Up&& __u)
244  {
245    __t_ = std::forward<_Up>(__u);
246    return *this;
247  }
248
249  _LIBCPP_CONSTEXPR const element_type* get() const
250  {
251    return __get_pointer(__t_);
252  }
253
254  _LIBCPP_CONSTEXPR element_type* get()
255  {
256    return __get_pointer(__t_);
257  }
258
259  explicit _LIBCPP_CONSTEXPR operator bool() const
260  {
261    return get() != nullptr;
262  }
263
264  _LIBCPP_CONSTEXPR const element_type* operator->() const
265  {
266    return get();
267  }
268
269  template <class _Tp_ = _Tp, class _Up = enable_if_t<is_convertible<
270                                  const _Tp_, const element_type *>::value>>
271  _LIBCPP_CONSTEXPR operator const element_type *() const {
272    return get();
273  }
274
275  _LIBCPP_CONSTEXPR const element_type& operator*() const
276  {
277    return *get();
278  }
279
280  _LIBCPP_CONSTEXPR element_type* operator->()
281  {
282    return get();
283  }
284
285  template <class _Tp_ = _Tp, class _Up = enable_if_t<
286                                  is_convertible<_Tp_, element_type *>::value>>
287  _LIBCPP_CONSTEXPR operator element_type *() {
288    return get();
289  }
290
291  _LIBCPP_CONSTEXPR element_type& operator*()
292  {
293    return *get();
294  }
295
296  _LIBCPP_CONSTEXPR void swap(propagate_const& __pt) _NOEXCEPT_(__is_nothrow_swappable<_Tp>::value)
297  {
298    using _VSTD::swap;
299    swap(__t_, __pt.__t_);
300  }
301};
302
303
304template <class _Tp>
305_LIBCPP_INLINE_VISIBILITY
306_LIBCPP_CONSTEXPR bool operator==(const propagate_const<_Tp>& __pt, nullptr_t)
307{
308  return _VSTD_LFTS_V2::get_underlying(__pt) == nullptr;
309}
310
311template <class _Tp>
312_LIBCPP_INLINE_VISIBILITY
313_LIBCPP_CONSTEXPR bool operator==(nullptr_t, const propagate_const<_Tp>& __pt)
314{
315  return nullptr == _VSTD_LFTS_V2::get_underlying(__pt);
316}
317
318template <class _Tp>
319_LIBCPP_INLINE_VISIBILITY
320_LIBCPP_CONSTEXPR bool operator!=(const propagate_const<_Tp>& __pt, nullptr_t)
321{
322  return _VSTD_LFTS_V2::get_underlying(__pt) != nullptr;
323}
324
325template <class _Tp>
326_LIBCPP_INLINE_VISIBILITY
327_LIBCPP_CONSTEXPR bool operator!=(nullptr_t, const propagate_const<_Tp>& __pt)
328{
329  return nullptr != _VSTD_LFTS_V2::get_underlying(__pt);
330}
331
332template <class _Tp, class _Up>
333_LIBCPP_INLINE_VISIBILITY
334_LIBCPP_CONSTEXPR bool operator==(const propagate_const<_Tp>& __pt,
335                          const propagate_const<_Up>& __pu)
336{
337  return _VSTD_LFTS_V2::get_underlying(__pt) == _VSTD_LFTS_V2::get_underlying(__pu);
338}
339
340template <class _Tp, class _Up>
341_LIBCPP_INLINE_VISIBILITY
342_LIBCPP_CONSTEXPR bool operator!=(const propagate_const<_Tp>& __pt,
343                          const propagate_const<_Up>& __pu)
344{
345  return _VSTD_LFTS_V2::get_underlying(__pt) != _VSTD_LFTS_V2::get_underlying(__pu);
346}
347
348template <class _Tp, class _Up>
349_LIBCPP_INLINE_VISIBILITY
350_LIBCPP_CONSTEXPR bool operator<(const propagate_const<_Tp>& __pt,
351                         const propagate_const<_Up>& __pu)
352{
353  return _VSTD_LFTS_V2::get_underlying(__pt) < _VSTD_LFTS_V2::get_underlying(__pu);
354}
355
356template <class _Tp, class _Up>
357_LIBCPP_INLINE_VISIBILITY
358_LIBCPP_CONSTEXPR bool operator>(const propagate_const<_Tp>& __pt,
359                         const propagate_const<_Up>& __pu)
360{
361  return _VSTD_LFTS_V2::get_underlying(__pt) > _VSTD_LFTS_V2::get_underlying(__pu);
362}
363
364template <class _Tp, class _Up>
365_LIBCPP_INLINE_VISIBILITY
366_LIBCPP_CONSTEXPR bool operator<=(const propagate_const<_Tp>& __pt,
367                          const propagate_const<_Up>& __pu)
368{
369  return _VSTD_LFTS_V2::get_underlying(__pt) <= _VSTD_LFTS_V2::get_underlying(__pu);
370}
371
372template <class _Tp, class _Up>
373_LIBCPP_INLINE_VISIBILITY
374_LIBCPP_CONSTEXPR bool operator>=(const propagate_const<_Tp>& __pt,
375                          const propagate_const<_Up>& __pu)
376{
377  return _VSTD_LFTS_V2::get_underlying(__pt) >= _VSTD_LFTS_V2::get_underlying(__pu);
378}
379
380template <class _Tp, class _Up>
381_LIBCPP_INLINE_VISIBILITY
382_LIBCPP_CONSTEXPR bool operator==(const propagate_const<_Tp>& __pt, const _Up& __u)
383{
384  return _VSTD_LFTS_V2::get_underlying(__pt) == __u;
385}
386
387template <class _Tp, class _Up>
388_LIBCPP_INLINE_VISIBILITY
389_LIBCPP_CONSTEXPR bool operator!=(const propagate_const<_Tp>& __pt, const _Up& __u)
390{
391  return _VSTD_LFTS_V2::get_underlying(__pt) != __u;
392}
393
394template <class _Tp, class _Up>
395_LIBCPP_INLINE_VISIBILITY
396_LIBCPP_CONSTEXPR bool operator<(const propagate_const<_Tp>& __pt, const _Up& __u)
397{
398  return _VSTD_LFTS_V2::get_underlying(__pt) < __u;
399}
400
401template <class _Tp, class _Up>
402_LIBCPP_INLINE_VISIBILITY
403_LIBCPP_CONSTEXPR bool operator>(const propagate_const<_Tp>& __pt, const _Up& __u)
404{
405  return _VSTD_LFTS_V2::get_underlying(__pt) > __u;
406}
407
408template <class _Tp, class _Up>
409_LIBCPP_INLINE_VISIBILITY
410_LIBCPP_CONSTEXPR bool operator<=(const propagate_const<_Tp>& __pt, const _Up& __u)
411{
412  return _VSTD_LFTS_V2::get_underlying(__pt) <= __u;
413}
414
415template <class _Tp, class _Up>
416_LIBCPP_INLINE_VISIBILITY
417_LIBCPP_CONSTEXPR bool operator>=(const propagate_const<_Tp>& __pt, const _Up& __u)
418{
419  return _VSTD_LFTS_V2::get_underlying(__pt) >= __u;
420}
421
422
423template <class _Tp, class _Up>
424_LIBCPP_INLINE_VISIBILITY
425_LIBCPP_CONSTEXPR bool operator==(const _Tp& __t, const propagate_const<_Up>& __pu)
426{
427  return __t == _VSTD_LFTS_V2::get_underlying(__pu);
428}
429
430template <class _Tp, class _Up>
431_LIBCPP_INLINE_VISIBILITY
432_LIBCPP_CONSTEXPR bool operator!=(const _Tp& __t, const propagate_const<_Up>& __pu)
433{
434  return __t != _VSTD_LFTS_V2::get_underlying(__pu);
435}
436
437template <class _Tp, class _Up>
438_LIBCPP_INLINE_VISIBILITY
439_LIBCPP_CONSTEXPR bool operator<(const _Tp& __t, const propagate_const<_Up>& __pu)
440{
441  return __t < _VSTD_LFTS_V2::get_underlying(__pu);
442}
443
444template <class _Tp, class _Up>
445_LIBCPP_INLINE_VISIBILITY
446_LIBCPP_CONSTEXPR bool operator>(const _Tp& __t, const propagate_const<_Up>& __pu)
447{
448  return __t > _VSTD_LFTS_V2::get_underlying(__pu);
449}
450
451template <class _Tp, class _Up>
452_LIBCPP_INLINE_VISIBILITY
453_LIBCPP_CONSTEXPR bool operator<=(const _Tp& __t, const propagate_const<_Up>& __pu)
454{
455  return __t <= _VSTD_LFTS_V2::get_underlying(__pu);
456}
457
458template <class _Tp, class _Up>
459_LIBCPP_INLINE_VISIBILITY
460_LIBCPP_CONSTEXPR bool operator>=(const _Tp& __t, const propagate_const<_Up>& __pu)
461{
462  return __t >= _VSTD_LFTS_V2::get_underlying(__pu);
463}
464
465template <class _Tp>
466_LIBCPP_INLINE_VISIBILITY
467_LIBCPP_CONSTEXPR void swap(propagate_const<_Tp>& __pc1, propagate_const<_Tp>& __pc2) _NOEXCEPT_(__is_nothrow_swappable<_Tp>::value)
468{
469  __pc1.swap(__pc2);
470}
471
472template <class _Tp>
473_LIBCPP_CONSTEXPR const _Tp& get_underlying(const propagate_const<_Tp>& __pt) _NOEXCEPT
474{
475  return __pt.__t_;
476}
477
478template <class _Tp>
479_LIBCPP_CONSTEXPR _Tp& get_underlying(propagate_const<_Tp>& __pt) _NOEXCEPT
480{
481  return __pt.__t_;
482}
483
484_LIBCPP_END_NAMESPACE_LFTS_V2
485
486_LIBCPP_BEGIN_NAMESPACE_STD
487
488template <class _Tp>
489struct hash<experimental::fundamentals_v2::propagate_const<_Tp>>
490{
491  typedef size_t result_type;
492  typedef experimental::fundamentals_v2::propagate_const<_Tp> argument_type;
493
494  size_t operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1) const
495  {
496    return std::hash<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1));
497  }
498};
499
500template <class _Tp>
501struct equal_to<experimental::fundamentals_v2::propagate_const<_Tp>>
502{
503  typedef experimental::fundamentals_v2::propagate_const<_Tp> first_argument_type;
504  typedef experimental::fundamentals_v2::propagate_const<_Tp> second_argument_type;
505
506  bool operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1,
507      const experimental::fundamentals_v2::propagate_const<_Tp>& __pc2) const
508  {
509    return std::equal_to<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1), _VSTD_LFTS_V2::get_underlying(__pc2));
510  }
511};
512
513template <class _Tp>
514struct not_equal_to<experimental::fundamentals_v2::propagate_const<_Tp>>
515{
516  typedef experimental::fundamentals_v2::propagate_const<_Tp> first_argument_type;
517  typedef experimental::fundamentals_v2::propagate_const<_Tp> second_argument_type;
518
519  bool operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1,
520      const experimental::fundamentals_v2::propagate_const<_Tp>& __pc2) const
521  {
522    return std::not_equal_to<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1), _VSTD_LFTS_V2::get_underlying(__pc2));
523  }
524};
525
526template <class _Tp>
527struct less<experimental::fundamentals_v2::propagate_const<_Tp>>
528{
529  typedef experimental::fundamentals_v2::propagate_const<_Tp> first_argument_type;
530  typedef experimental::fundamentals_v2::propagate_const<_Tp> second_argument_type;
531
532  bool operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1,
533      const experimental::fundamentals_v2::propagate_const<_Tp>& __pc2) const
534  {
535    return std::less<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1), _VSTD_LFTS_V2::get_underlying(__pc2));
536  }
537};
538
539template <class _Tp>
540struct greater<experimental::fundamentals_v2::propagate_const<_Tp>>
541{
542  typedef experimental::fundamentals_v2::propagate_const<_Tp> first_argument_type;
543  typedef experimental::fundamentals_v2::propagate_const<_Tp> second_argument_type;
544
545  bool operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1,
546      const experimental::fundamentals_v2::propagate_const<_Tp>& __pc2) const
547  {
548    return std::greater<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1), _VSTD_LFTS_V2::get_underlying(__pc2));
549  }
550};
551
552template <class _Tp>
553struct less_equal<experimental::fundamentals_v2::propagate_const<_Tp>>
554{
555  typedef experimental::fundamentals_v2::propagate_const<_Tp> first_argument_type;
556  typedef experimental::fundamentals_v2::propagate_const<_Tp> second_argument_type;
557
558  bool operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1,
559      const experimental::fundamentals_v2::propagate_const<_Tp>& __pc2) const
560  {
561    return std::less_equal<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1), _VSTD_LFTS_V2::get_underlying(__pc2));
562  }
563};
564
565template <class _Tp>
566struct greater_equal<experimental::fundamentals_v2::propagate_const<_Tp>>
567{
568  typedef experimental::fundamentals_v2::propagate_const<_Tp> first_argument_type;
569  typedef experimental::fundamentals_v2::propagate_const<_Tp> second_argument_type;
570
571  bool operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1,
572      const experimental::fundamentals_v2::propagate_const<_Tp>& __pc2) const
573  {
574    return std::greater_equal<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1), _VSTD_LFTS_V2::get_underlying(__pc2));
575  }
576};
577
578_LIBCPP_END_NAMESPACE_STD
579
580#endif // _LIBCPP_STD_VER > 11
581#endif // _LIBCPP_EXPERIMENTAL_PROPAGATE_CONST
582