propagate_const revision 341825 
1// -*- C++ -*-
2//===------------------------ propagate_const -----------------------------===//
3//
4//                     The LLVM Compiler Infrastructure
5//
6// This file is dual licensed under the MIT and the University of Illinois Open
7// Source Licenses. See LICENSE.TXT for details.
8//
9//===----------------------------------------------------------------------===//
10
11#ifndef _LIBCPP_EXPERIMENTAL_PROPAGATE_CONST
12#define _LIBCPP_EXPERIMENTAL_PROPAGATE_CONST
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 <experimental/__config>
111#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
112#pragma GCC system_header
113#endif
114
115#if _LIBCPP_STD_VER > 11
116
117#include <type_traits>
118#include <utility>
119#include <functional>
120
121_LIBCPP_BEGIN_NAMESPACE_LFTS_V2
122
123
124template <class _Tp>
125class propagate_const;
126
127template <class _Up>
128inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
129const _Up& get_underlying(const propagate_const<_Up>& __pu) _NOEXCEPT;
130
131template <class _Up>
132inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
133_Up& get_underlying(propagate_const<_Up>& __pu) _NOEXCEPT;
134
135template <class _Tp>
136class propagate_const
137{
138public:
139  typedef remove_reference_t<decltype(*_VSTD::declval<_Tp&>())> element_type;
140
141  static_assert(!is_array<_Tp>::value,
142      "Instantiation of propagate_const with an array type is ill-formed.");
143  static_assert(!is_reference<_Tp>::value,
144      "Instantiation of propagate_const with a reference type is ill-formed.");
145  static_assert(!(is_pointer<_Tp>::value && is_function<typename remove_pointer<_Tp>::type>::value),
146      "Instantiation of propagate_const with a function-pointer type is ill-formed.");
147  static_assert(!(is_pointer<_Tp>::value && is_same<typename remove_cv<typename remove_pointer<_Tp>::type>::type, void>::value),
148      "Instantiation of propagate_const with a pointer to (possibly cv-qualified) void is ill-formed.");
149
150private:
151  template <class _Up>
152  static _LIBCPP_CONSTEXPR element_type* __get_pointer(_Up* __u)
153  {
154    return __u;
155  }
156
157  template <class _Up>
158  static _LIBCPP_CONSTEXPR element_type* __get_pointer(_Up& __u)
159  {
160    return __get_pointer(__u.get());
161  }
162
163  template <class _Up>
164  static _LIBCPP_CONSTEXPR const element_type* __get_pointer(const _Up* __u)
165  {
166    return __u;
167  }
168
169  template <class _Up>
170  static _LIBCPP_CONSTEXPR const element_type* __get_pointer(const _Up& __u)
171  {
172    return __get_pointer(__u.get());
173  }
174
175  template <class _Up>
176  struct __is_propagate_const : false_type
177  {
178  };
179
180  template <class _Up>
181  struct __is_propagate_const<propagate_const<_Up>> : true_type
182  {
183  };
184
185  _Tp __t_;
186
187public:
188
189  template <class _Up> friend _LIBCPP_CONSTEXPR const _Up& ::_VSTD_LFTS_V2::get_underlying(const propagate_const<_Up>& __pu) _NOEXCEPT;
190  template <class _Up> friend _LIBCPP_CONSTEXPR _Up& ::_VSTD_LFTS_V2::get_underlying(propagate_const<_Up>& __pu) _NOEXCEPT;
191
192  _LIBCPP_CONSTEXPR propagate_const() = default;
193
194  propagate_const(const propagate_const&) = delete;
195
196  _LIBCPP_CONSTEXPR propagate_const(propagate_const&&) = default;
197
198  template <class _Up, enable_if_t<!is_convertible<_Up, _Tp>::value &&
199                                 is_constructible<_Tp, _Up&&>::value,bool> = true>
200  explicit _LIBCPP_CONSTEXPR propagate_const(propagate_const<_Up>&& __pu)
201      : __t_(std::move(_VSTD_LFTS_V2::get_underlying(__pu)))
202  {
203  }
204
205  template <class _Up, enable_if_t<is_convertible<_Up&&, _Tp>::value &&
206                                 is_constructible<_Tp, _Up&&>::value,bool> = false>
207  _LIBCPP_CONSTEXPR propagate_const(propagate_const<_Up>&& __pu)
208      : __t_(std::move(_VSTD_LFTS_V2::get_underlying(__pu)))
209  {
210  }
211
212  template <class _Up, enable_if_t<!is_convertible<_Up&&, _Tp>::value &&
213                                 is_constructible<_Tp, _Up&&>::value &&
214                                 !__is_propagate_const<decay_t<_Up>>::value,bool> = true>
215  explicit _LIBCPP_CONSTEXPR propagate_const(_Up&& __u)
216      : __t_(std::forward<_Up>(__u))
217  {
218  }
219
220  template <class _Up, enable_if_t<is_convertible<_Up&&, _Tp>::value &&
221                                 is_constructible<_Tp, _Up&&>::value &&
222                                 !__is_propagate_const<decay_t<_Up>>::value,bool> = false>
223  _LIBCPP_CONSTEXPR propagate_const(_Up&& __u)
224      : __t_(std::forward<_Up>(__u))
225  {
226  }
227
228  propagate_const& operator=(const propagate_const&) = delete;
229
230  _LIBCPP_CONSTEXPR propagate_const& operator=(propagate_const&&) = default;
231
232  template <class _Up>
233  _LIBCPP_CONSTEXPR propagate_const& operator=(propagate_const<_Up>&& __pu)
234  {
235    __t_ = std::move(_VSTD_LFTS_V2::get_underlying(__pu));
236    return *this;
237  }
238
239  template <class _Up, class _Vp = enable_if_t<!__is_propagate_const<decay_t<_Up>>::value>>
240  _LIBCPP_CONSTEXPR propagate_const& operator=(_Up&& __u)
241  {
242    __t_ = std::forward<_Up>(__u);
243    return *this;
244  }
245
246  _LIBCPP_CONSTEXPR const element_type* get() const
247  {
248    return __get_pointer(__t_);
249  }
250
251  _LIBCPP_CONSTEXPR element_type* get()
252  {
253    return __get_pointer(__t_);
254  }
255
256  explicit _LIBCPP_CONSTEXPR operator bool() const
257  {
258    return get() != nullptr;
259  }
260
261  _LIBCPP_CONSTEXPR const element_type* operator->() const
262  {
263    return get();
264  }
265
266  template <class _Tp_ = _Tp, class _Up = enable_if_t<is_convertible<
267                                  const _Tp_, const element_type *>::value>>
268  _LIBCPP_CONSTEXPR operator const element_type *() const {
269    return get();
270  }
271
272  _LIBCPP_CONSTEXPR const element_type& operator*() const
273  {
274    return *get();
275  }
276
277  _LIBCPP_CONSTEXPR element_type* operator->()
278  {
279    return get();
280  }
281
282  template <class _Tp_ = _Tp, class _Up = enable_if_t<
283                                  is_convertible<_Tp_, element_type *>::value>>
284  _LIBCPP_CONSTEXPR operator element_type *() {
285    return get();
286  }
287
288  _LIBCPP_CONSTEXPR element_type& operator*()
289  {
290    return *get();
291  }
292
293  _LIBCPP_CONSTEXPR void swap(propagate_const& __pt) _NOEXCEPT_(__is_nothrow_swappable<_Tp>::value)
294  {
295    using _VSTD::swap;
296    swap(__t_, __pt.__t_);
297  }
298};
299
300
301template <class _Tp>
302_LIBCPP_INLINE_VISIBILITY
303_LIBCPP_CONSTEXPR bool operator==(const propagate_const<_Tp>& __pt, nullptr_t)
304{
305  return _VSTD_LFTS_V2::get_underlying(__pt) == nullptr;
306}
307
308template <class _Tp>
309_LIBCPP_INLINE_VISIBILITY
310_LIBCPP_CONSTEXPR bool operator==(nullptr_t, const propagate_const<_Tp>& __pt)
311{
312  return nullptr == _VSTD_LFTS_V2::get_underlying(__pt);
313}
314
315template <class _Tp>
316_LIBCPP_INLINE_VISIBILITY
317_LIBCPP_CONSTEXPR bool operator!=(const propagate_const<_Tp>& __pt, nullptr_t)
318{
319  return _VSTD_LFTS_V2::get_underlying(__pt) != nullptr;
320}
321
322template <class _Tp>
323_LIBCPP_INLINE_VISIBILITY
324_LIBCPP_CONSTEXPR bool operator!=(nullptr_t, const propagate_const<_Tp>& __pt)
325{
326  return nullptr != _VSTD_LFTS_V2::get_underlying(__pt);
327}
328
329template <class _Tp, class _Up>
330_LIBCPP_INLINE_VISIBILITY
331_LIBCPP_CONSTEXPR bool operator==(const propagate_const<_Tp>& __pt,
332                          const propagate_const<_Up>& __pu)
333{
334  return _VSTD_LFTS_V2::get_underlying(__pt) == _VSTD_LFTS_V2::get_underlying(__pu);
335}
336
337template <class _Tp, class _Up>
338_LIBCPP_INLINE_VISIBILITY
339_LIBCPP_CONSTEXPR bool operator!=(const propagate_const<_Tp>& __pt,
340                          const propagate_const<_Up>& __pu)
341{
342  return _VSTD_LFTS_V2::get_underlying(__pt) != _VSTD_LFTS_V2::get_underlying(__pu);
343}
344
345template <class _Tp, class _Up>
346_LIBCPP_INLINE_VISIBILITY
347_LIBCPP_CONSTEXPR bool operator<(const propagate_const<_Tp>& __pt,
348                         const propagate_const<_Up>& __pu)
349{
350  return _VSTD_LFTS_V2::get_underlying(__pt) < _VSTD_LFTS_V2::get_underlying(__pu);
351}
352
353template <class _Tp, class _Up>
354_LIBCPP_INLINE_VISIBILITY
355_LIBCPP_CONSTEXPR bool operator>(const propagate_const<_Tp>& __pt,
356                         const propagate_const<_Up>& __pu)
357{
358  return _VSTD_LFTS_V2::get_underlying(__pt) > _VSTD_LFTS_V2::get_underlying(__pu);
359}
360
361template <class _Tp, class _Up>
362_LIBCPP_INLINE_VISIBILITY
363_LIBCPP_CONSTEXPR bool operator<=(const propagate_const<_Tp>& __pt,
364                          const propagate_const<_Up>& __pu)
365{
366  return _VSTD_LFTS_V2::get_underlying(__pt) <= _VSTD_LFTS_V2::get_underlying(__pu);
367}
368
369template <class _Tp, class _Up>
370_LIBCPP_INLINE_VISIBILITY
371_LIBCPP_CONSTEXPR bool operator>=(const propagate_const<_Tp>& __pt,
372                          const propagate_const<_Up>& __pu)
373{
374  return _VSTD_LFTS_V2::get_underlying(__pt) >= _VSTD_LFTS_V2::get_underlying(__pu);
375}
376
377template <class _Tp, class _Up>
378_LIBCPP_INLINE_VISIBILITY
379_LIBCPP_CONSTEXPR bool operator==(const propagate_const<_Tp>& __pt, const _Up& __u)
380{
381  return _VSTD_LFTS_V2::get_underlying(__pt) == __u;
382}
383
384template <class _Tp, class _Up>
385_LIBCPP_INLINE_VISIBILITY
386_LIBCPP_CONSTEXPR bool operator!=(const propagate_const<_Tp>& __pt, const _Up& __u)
387{
388  return _VSTD_LFTS_V2::get_underlying(__pt) != __u;
389}
390
391template <class _Tp, class _Up>
392_LIBCPP_INLINE_VISIBILITY
393_LIBCPP_CONSTEXPR bool operator<(const propagate_const<_Tp>& __pt, const _Up& __u)
394{
395  return _VSTD_LFTS_V2::get_underlying(__pt) < __u;
396}
397
398template <class _Tp, class _Up>
399_LIBCPP_INLINE_VISIBILITY
400_LIBCPP_CONSTEXPR bool operator>(const propagate_const<_Tp>& __pt, const _Up& __u)
401{
402  return _VSTD_LFTS_V2::get_underlying(__pt) > __u;
403}
404
405template <class _Tp, class _Up>
406_LIBCPP_INLINE_VISIBILITY
407_LIBCPP_CONSTEXPR bool operator<=(const propagate_const<_Tp>& __pt, const _Up& __u)
408{
409  return _VSTD_LFTS_V2::get_underlying(__pt) <= __u;
410}
411
412template <class _Tp, class _Up>
413_LIBCPP_INLINE_VISIBILITY
414_LIBCPP_CONSTEXPR bool operator>=(const propagate_const<_Tp>& __pt, const _Up& __u)
415{
416  return _VSTD_LFTS_V2::get_underlying(__pt) >= __u;
417}
418
419
420template <class _Tp, class _Up>
421_LIBCPP_INLINE_VISIBILITY
422_LIBCPP_CONSTEXPR bool operator==(const _Tp& __t, const propagate_const<_Up>& __pu)
423{
424  return __t == _VSTD_LFTS_V2::get_underlying(__pu);
425}
426
427template <class _Tp, class _Up>
428_LIBCPP_INLINE_VISIBILITY
429_LIBCPP_CONSTEXPR bool operator!=(const _Tp& __t, const propagate_const<_Up>& __pu)
430{
431  return __t != _VSTD_LFTS_V2::get_underlying(__pu);
432}
433
434template <class _Tp, class _Up>
435_LIBCPP_INLINE_VISIBILITY
436_LIBCPP_CONSTEXPR bool operator<(const _Tp& __t, const propagate_const<_Up>& __pu)
437{
438  return __t < _VSTD_LFTS_V2::get_underlying(__pu);
439}
440
441template <class _Tp, class _Up>
442_LIBCPP_INLINE_VISIBILITY
443_LIBCPP_CONSTEXPR bool operator>(const _Tp& __t, const propagate_const<_Up>& __pu)
444{
445  return __t > _VSTD_LFTS_V2::get_underlying(__pu);
446}
447
448template <class _Tp, class _Up>
449_LIBCPP_INLINE_VISIBILITY
450_LIBCPP_CONSTEXPR bool operator<=(const _Tp& __t, const propagate_const<_Up>& __pu)
451{
452  return __t <= _VSTD_LFTS_V2::get_underlying(__pu);
453}
454
455template <class _Tp, class _Up>
456_LIBCPP_INLINE_VISIBILITY
457_LIBCPP_CONSTEXPR bool operator>=(const _Tp& __t, const propagate_const<_Up>& __pu)
458{
459  return __t >= _VSTD_LFTS_V2::get_underlying(__pu);
460}
461
462template <class _Tp>
463_LIBCPP_INLINE_VISIBILITY
464_LIBCPP_CONSTEXPR void swap(propagate_const<_Tp>& __pc1, propagate_const<_Tp>& __pc2) _NOEXCEPT_(__is_nothrow_swappable<_Tp>::value)
465{
466  __pc1.swap(__pc2);
467}
468
469template <class _Tp>
470_LIBCPP_CONSTEXPR const _Tp& get_underlying(const propagate_const<_Tp>& __pt) _NOEXCEPT
471{
472  return __pt.__t_;
473}
474
475template <class _Tp>
476_LIBCPP_CONSTEXPR _Tp& get_underlying(propagate_const<_Tp>& __pt) _NOEXCEPT
477{
478  return __pt.__t_;
479}
480
481_LIBCPP_END_NAMESPACE_LFTS_V2
482
483_LIBCPP_BEGIN_NAMESPACE_STD
484
485template <class _Tp>
486struct hash<experimental::fundamentals_v2::propagate_const<_Tp>>
487{
488  typedef size_t result_type;
489  typedef experimental::fundamentals_v2::propagate_const<_Tp> argument_type;
490
491  size_t operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1) const
492  {
493    return std::hash<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1));
494  }
495};
496
497template <class _Tp>
498struct equal_to<experimental::fundamentals_v2::propagate_const<_Tp>>
499{
500  typedef experimental::fundamentals_v2::propagate_const<_Tp> first_argument_type;
501  typedef experimental::fundamentals_v2::propagate_const<_Tp> second_argument_type;
502
503  bool operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1,
504      const experimental::fundamentals_v2::propagate_const<_Tp>& __pc2) const
505  {
506    return std::equal_to<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1), _VSTD_LFTS_V2::get_underlying(__pc2));
507  }
508};
509
510template <class _Tp>
511struct not_equal_to<experimental::fundamentals_v2::propagate_const<_Tp>>
512{
513  typedef experimental::fundamentals_v2::propagate_const<_Tp> first_argument_type;
514  typedef experimental::fundamentals_v2::propagate_const<_Tp> second_argument_type;
515
516  bool operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1,
517      const experimental::fundamentals_v2::propagate_const<_Tp>& __pc2) const
518  {
519    return std::not_equal_to<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1), _VSTD_LFTS_V2::get_underlying(__pc2));
520  }
521};
522
523template <class _Tp>
524struct less<experimental::fundamentals_v2::propagate_const<_Tp>>
525{
526  typedef experimental::fundamentals_v2::propagate_const<_Tp> first_argument_type;
527  typedef experimental::fundamentals_v2::propagate_const<_Tp> second_argument_type;
528
529  bool operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1,
530      const experimental::fundamentals_v2::propagate_const<_Tp>& __pc2) const
531  {
532    return std::less<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1), _VSTD_LFTS_V2::get_underlying(__pc2));
533  }
534};
535
536template <class _Tp>
537struct greater<experimental::fundamentals_v2::propagate_const<_Tp>>
538{
539  typedef experimental::fundamentals_v2::propagate_const<_Tp> first_argument_type;
540  typedef experimental::fundamentals_v2::propagate_const<_Tp> second_argument_type;
541
542  bool operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1,
543      const experimental::fundamentals_v2::propagate_const<_Tp>& __pc2) const
544  {
545    return std::greater<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1), _VSTD_LFTS_V2::get_underlying(__pc2));
546  }
547};
548
549template <class _Tp>
550struct less_equal<experimental::fundamentals_v2::propagate_const<_Tp>>
551{
552  typedef experimental::fundamentals_v2::propagate_const<_Tp> first_argument_type;
553  typedef experimental::fundamentals_v2::propagate_const<_Tp> second_argument_type;
554
555  bool operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1,
556      const experimental::fundamentals_v2::propagate_const<_Tp>& __pc2) const
557  {
558    return std::less_equal<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1), _VSTD_LFTS_V2::get_underlying(__pc2));
559  }
560};
561
562template <class _Tp>
563struct greater_equal<experimental::fundamentals_v2::propagate_const<_Tp>>
564{
565  typedef experimental::fundamentals_v2::propagate_const<_Tp> first_argument_type;
566  typedef experimental::fundamentals_v2::propagate_const<_Tp> second_argument_type;
567
568  bool operator()(const experimental::fundamentals_v2::propagate_const<_Tp>& __pc1,
569      const experimental::fundamentals_v2::propagate_const<_Tp>& __pc2) const
570  {
571    return std::greater_equal<_Tp>()(_VSTD_LFTS_V2::get_underlying(__pc1), _VSTD_LFTS_V2::get_underlying(__pc2));
572  }
573};
574
575_LIBCPP_END_NAMESPACE_STD
576
577#endif // _LIBCPP_STD_VER > 11
578#endif // _LIBCPP_EXPERIMENTAL_PROPAGATE_CONST
579
580