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_BITSET
11#define _LIBCPP_BITSET
12
13/*
14    bitset synopsis
15
16namespace std
17{
18
19namespace std {
20
21template <size_t N>
22class bitset
23{
24public:
25    // bit reference:
26    class reference
27    {
28        friend class bitset;
29        reference() noexcept;
30    public:
31        ~reference() noexcept;
32        reference& operator=(bool x) noexcept;           // for b[i] = x;
33        reference& operator=(const reference&) noexcept; // for b[i] = b[j];
34        bool operator~() const noexcept;                 // flips the bit
35        operator bool() const noexcept;                  // for x = b[i];
36        reference& flip() noexcept;                      // for b[i].flip();
37    };
38
39    // 23.3.5.1 constructors:
40    constexpr bitset() noexcept;
41    constexpr bitset(unsigned long long val) noexcept;
42    template <class charT>
43        explicit bitset(const charT* str,
44                        typename basic_string<charT>::size_type n = basic_string<charT>::npos,
45                        charT zero = charT('0'), charT one = charT('1')); // constexpr since C++23
46    template<class charT, class traits, class Allocator>
47        explicit bitset(const basic_string<charT,traits,Allocator>& str,
48                        typename basic_string<charT,traits,Allocator>::size_type pos = 0,
49                        typename basic_string<charT,traits,Allocator>::size_type n =
50                                 basic_string<charT,traits,Allocator>::npos,
51                        charT zero = charT('0'), charT one = charT('1')); // constexpr since C++23
52
53    // 23.3.5.2 bitset operations:
54    bitset& operator&=(const bitset& rhs) noexcept; // constexpr since C++23
55    bitset& operator|=(const bitset& rhs) noexcept; // constexpr since C++23
56    bitset& operator^=(const bitset& rhs) noexcept; // constexpr since C++23
57    bitset& operator<<=(size_t pos) noexcept;       // constexpr since C++23
58    bitset& operator>>=(size_t pos) noexcept;       // constexpr since C++23
59    bitset& set() noexcept;                         // constexpr since C++23
60    bitset& set(size_t pos, bool val = true);       // constexpr since C++23
61    bitset& reset() noexcept;                       // constexpr since C++23
62    bitset& reset(size_t pos);                      // constexpr since C++23
63    bitset operator~() const noexcept;              // constexpr since C++23
64    bitset& flip() noexcept;                        // constexpr since C++23
65    bitset& flip(size_t pos);                       // constexpr since C++23
66
67    // element access:
68    constexpr bool operator[](size_t pos) const;
69    reference operator[](size_t pos);            // constexpr since C++23
70    unsigned long to_ulong() const;              // constexpr since C++23
71    unsigned long long to_ullong() const;        // constexpr since C++23
72    template <class charT, class traits, class Allocator> // constexpr since C++23
73        basic_string<charT, traits, Allocator> to_string(charT zero = charT('0'), charT one = charT('1')) const;
74    template <class charT, class traits> // constexpr since C++23
75        basic_string<charT, traits, allocator<charT> > to_string(charT zero = charT('0'), charT one = charT('1')) const;
76    template <class charT> // constexpr since C++23
77        basic_string<charT, char_traits<charT>, allocator<charT> > to_string(charT zero = charT('0'), charT one = charT('1')) const;
78    basic_string<char, char_traits<char>, allocator<char> > to_string(char zero = '0', char one = '1') const; // constexpr since C++23
79    size_t count() const noexcept;                     // constexpr since C++23
80    constexpr size_t size() const noexcept;            // constexpr since C++23
81    bool operator==(const bitset& rhs) const noexcept; // constexpr since C++23
82    bool operator!=(const bitset& rhs) const noexcept; // constexpr since C++23
83    bool test(size_t pos) const;                       // constexpr since C++23
84    bool all() const noexcept;                         // constexpr since C++23
85    bool any() const noexcept;                         // constexpr since C++23
86    bool none() const noexcept;                        // constexpr since C++23
87    bitset<N> operator<<(size_t pos) const noexcept;   // constexpr since C++23
88    bitset<N> operator>>(size_t pos) const noexcept;   // constexpr since C++23
89};
90
91// 23.3.5.3 bitset operators:
92template <size_t N>
93bitset<N> operator&(const bitset<N>&, const bitset<N>&) noexcept; // constexpr since C++23
94
95template <size_t N>
96bitset<N> operator|(const bitset<N>&, const bitset<N>&) noexcept; // constexpr since C++23
97
98template <size_t N>
99bitset<N> operator^(const bitset<N>&, const bitset<N>&) noexcept; // constexpr since C++23
100
101template <class charT, class traits, size_t N>
102basic_istream<charT, traits>&
103operator>>(basic_istream<charT, traits>& is, bitset<N>& x);
104
105template <class charT, class traits, size_t N>
106basic_ostream<charT, traits>&
107operator<<(basic_ostream<charT, traits>& os, const bitset<N>& x);
108
109template <size_t N> struct hash<std::bitset<N>>;
110
111}  // std
112
113*/
114
115#include <__algorithm/fill.h>
116#include <__assert> // all public C++ headers provide the assertion handler
117#include <__bit_reference>
118#include <__config>
119#include <__functional/hash.h>
120#include <__functional/unary_function.h>
121#include <__type_traits/is_char_like_type.h>
122#include <climits>
123#include <cstddef>
124#include <stdexcept>
125#include <version>
126
127// standard-mandated includes
128
129// [bitset.syn]
130#include <iosfwd>
131#include <string>
132
133#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
134#  pragma GCC system_header
135#endif
136
137_LIBCPP_PUSH_MACROS
138#include <__undef_macros>
139
140
141_LIBCPP_BEGIN_NAMESPACE_STD
142
143template <size_t _N_words, size_t _Size>
144class __bitset;
145
146template <size_t _N_words, size_t _Size>
147struct __has_storage_type<__bitset<_N_words, _Size> >
148{
149    static const bool value = true;
150};
151
152template <size_t _N_words, size_t _Size>
153class __bitset
154{
155public:
156    typedef ptrdiff_t              difference_type;
157    typedef size_t                 size_type;
158    typedef size_type              __storage_type;
159protected:
160    typedef __bitset __self;
161    typedef       __storage_type*  __storage_pointer;
162    typedef const __storage_type*  __const_storage_pointer;
163    static const unsigned __bits_per_word = static_cast<unsigned>(sizeof(__storage_type) * CHAR_BIT);
164
165    friend class __bit_reference<__bitset>;
166    friend class __bit_const_reference<__bitset>;
167    friend class __bit_iterator<__bitset, false>;
168    friend class __bit_iterator<__bitset, true>;
169    friend struct __bit_array<__bitset>;
170
171    __storage_type __first_[_N_words];
172
173    typedef __bit_reference<__bitset>                  reference;
174    typedef __bit_const_reference<__bitset>            const_reference;
175    typedef __bit_iterator<__bitset, false>            iterator;
176    typedef __bit_iterator<__bitset, true>             const_iterator;
177
178    _LIBCPP_INLINE_VISIBILITY
179    _LIBCPP_CONSTEXPR __bitset() _NOEXCEPT;
180    _LIBCPP_INLINE_VISIBILITY
181    explicit _LIBCPP_CONSTEXPR __bitset(unsigned long long __v) _NOEXCEPT;
182
183    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 reference __make_ref(size_t __pos) _NOEXCEPT
184        {return reference(__first_ + __pos / __bits_per_word, __storage_type(1) << __pos % __bits_per_word);}
185    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR const_reference __make_ref(size_t __pos) const _NOEXCEPT
186        {return const_reference(__first_ + __pos / __bits_per_word, __storage_type(1) << __pos % __bits_per_word);}
187    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 iterator __make_iter(size_t __pos) _NOEXCEPT
188        {return iterator(__first_ + __pos / __bits_per_word, __pos % __bits_per_word);}
189    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 const_iterator __make_iter(size_t __pos) const _NOEXCEPT
190        {return const_iterator(__first_ + __pos / __bits_per_word, __pos % __bits_per_word);}
191
192    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
193    void operator&=(const __bitset& __v) _NOEXCEPT;
194    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
195    void operator|=(const __bitset& __v) _NOEXCEPT;
196    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
197    void operator^=(const __bitset& __v) _NOEXCEPT;
198
199    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void flip() _NOEXCEPT;
200    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long to_ulong() const
201        {return to_ulong(integral_constant<bool, _Size < sizeof(unsigned long) * CHAR_BIT>());}
202    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long to_ullong() const
203        {return to_ullong(integral_constant<bool, _Size < sizeof(unsigned long long) * CHAR_BIT>());}
204
205    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool all() const _NOEXCEPT;
206    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool any() const _NOEXCEPT;
207    _LIBCPP_INLINE_VISIBILITY
208    size_t __hash_code() const _NOEXCEPT;
209private:
210#ifdef _LIBCPP_CXX03_LANG
211    void __init(unsigned long long __v, false_type) _NOEXCEPT;
212    _LIBCPP_INLINE_VISIBILITY
213    void __init(unsigned long long __v, true_type) _NOEXCEPT;
214#endif // _LIBCPP_CXX03_LANG
215    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
216    unsigned long to_ulong(false_type) const;
217    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
218    unsigned long to_ulong(true_type) const;
219    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
220    unsigned long long to_ullong(false_type) const;
221    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
222    unsigned long long to_ullong(true_type) const;
223    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
224    unsigned long long to_ullong(true_type, false_type) const;
225    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
226    unsigned long long to_ullong(true_type, true_type) const;
227};
228
229template <size_t _N_words, size_t _Size>
230inline
231_LIBCPP_CONSTEXPR
232__bitset<_N_words, _Size>::__bitset() _NOEXCEPT
233#ifndef _LIBCPP_CXX03_LANG
234    : __first_{0}
235#endif
236{
237#ifdef _LIBCPP_CXX03_LANG
238    _VSTD::fill_n(__first_, _N_words, __storage_type(0));
239#endif
240}
241
242#ifdef _LIBCPP_CXX03_LANG
243
244template <size_t _N_words, size_t _Size>
245void
246__bitset<_N_words, _Size>::__init(unsigned long long __v, false_type) _NOEXCEPT
247{
248    __storage_type __t[sizeof(unsigned long long) / sizeof(__storage_type)];
249    size_t __sz = _Size;
250    for (size_t __i = 0; __i < sizeof(__t)/sizeof(__t[0]); ++__i, __v >>= __bits_per_word, __sz -= __bits_per_word )
251        if ( __sz < __bits_per_word)
252            __t[__i] = static_cast<__storage_type>(__v) & ( 1ULL << __sz ) - 1;
253        else
254            __t[__i] = static_cast<__storage_type>(__v);
255
256    _VSTD::copy(__t, __t + sizeof(__t)/sizeof(__t[0]), __first_);
257    _VSTD::fill(__first_ + sizeof(__t)/sizeof(__t[0]), __first_ + sizeof(__first_)/sizeof(__first_[0]),
258               __storage_type(0));
259}
260
261template <size_t _N_words, size_t _Size>
262inline _LIBCPP_INLINE_VISIBILITY
263void
264__bitset<_N_words, _Size>::__init(unsigned long long __v, true_type) _NOEXCEPT
265{
266    __first_[0] = __v;
267    if (_Size < __bits_per_word)
268        __first_[0] &= ( 1ULL << _Size ) - 1;
269
270    _VSTD::fill(__first_ + 1, __first_ + sizeof(__first_)/sizeof(__first_[0]), __storage_type(0));
271}
272
273#endif // _LIBCPP_CXX03_LANG
274
275template <size_t _N_words, size_t _Size>
276inline
277_LIBCPP_CONSTEXPR
278__bitset<_N_words, _Size>::__bitset(unsigned long long __v) _NOEXCEPT
279#ifndef _LIBCPP_CXX03_LANG
280#if __SIZEOF_SIZE_T__ == 8
281    : __first_{__v}
282#elif __SIZEOF_SIZE_T__ == 4
283    : __first_{static_cast<__storage_type>(__v),
284                _Size >= 2 * __bits_per_word ? static_cast<__storage_type>(__v >> __bits_per_word)
285                : static_cast<__storage_type>((__v >> __bits_per_word) & (__storage_type(1) << (_Size - __bits_per_word)) - 1)}
286#else
287#error This constructor has not been ported to this platform
288#endif
289#endif
290{
291#ifdef _LIBCPP_CXX03_LANG
292    __init(__v, integral_constant<bool, sizeof(unsigned long long) == sizeof(__storage_type)>());
293#endif
294}
295
296template <size_t _N_words, size_t _Size>
297inline
298_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void
299__bitset<_N_words, _Size>::operator&=(const __bitset& __v) _NOEXCEPT
300{
301    for (size_type __i = 0; __i < _N_words; ++__i)
302        __first_[__i] &= __v.__first_[__i];
303}
304
305template <size_t _N_words, size_t _Size>
306inline
307_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void
308__bitset<_N_words, _Size>::operator|=(const __bitset& __v) _NOEXCEPT
309{
310    for (size_type __i = 0; __i < _N_words; ++__i)
311        __first_[__i] |= __v.__first_[__i];
312}
313
314template <size_t _N_words, size_t _Size>
315inline
316_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void
317__bitset<_N_words, _Size>::operator^=(const __bitset& __v) _NOEXCEPT
318{
319    for (size_type __i = 0; __i < _N_words; ++__i)
320        __first_[__i] ^= __v.__first_[__i];
321}
322
323template <size_t _N_words, size_t _Size>
324_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void
325__bitset<_N_words, _Size>::flip() _NOEXCEPT
326{
327    // do middle whole words
328    size_type __n = _Size;
329    __storage_pointer __p = __first_;
330    for (; __n >= __bits_per_word; ++__p, __n -= __bits_per_word)
331        *__p = ~*__p;
332    // do last partial word
333    if (__n > 0)
334    {
335        __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
336        __storage_type __b = *__p & __m;
337        *__p &= ~__m;
338        *__p |= ~__b & __m;
339    }
340}
341
342template <size_t _N_words, size_t _Size>
343_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long
344__bitset<_N_words, _Size>::to_ulong(false_type) const
345{
346    const_iterator __e = __make_iter(_Size);
347    const_iterator __i = _VSTD::find(__make_iter(sizeof(unsigned long) * CHAR_BIT), __e, true);
348    if (__i != __e)
349        __throw_overflow_error("bitset to_ulong overflow error");
350
351    return __first_[0];
352}
353
354template <size_t _N_words, size_t _Size>
355inline
356_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long
357__bitset<_N_words, _Size>::to_ulong(true_type) const
358{
359    return __first_[0];
360}
361
362template <size_t _N_words, size_t _Size>
363_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long
364__bitset<_N_words, _Size>::to_ullong(false_type) const
365{
366    const_iterator __e = __make_iter(_Size);
367    const_iterator __i = _VSTD::find(__make_iter(sizeof(unsigned long long) * CHAR_BIT), __e, true);
368    if (__i != __e)
369        __throw_overflow_error("bitset to_ullong overflow error");
370
371    return to_ullong(true_type());
372}
373
374template <size_t _N_words, size_t _Size>
375inline
376_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long
377__bitset<_N_words, _Size>::to_ullong(true_type) const
378{
379    return to_ullong(true_type(), integral_constant<bool, sizeof(__storage_type) < sizeof(unsigned long long)>());
380}
381
382template <size_t _N_words, size_t _Size>
383inline
384_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long
385__bitset<_N_words, _Size>::to_ullong(true_type, false_type) const
386{
387    return __first_[0];
388}
389
390template <size_t _N_words, size_t _Size>
391_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long
392__bitset<_N_words, _Size>::to_ullong(true_type, true_type) const
393{
394    unsigned long long __r = __first_[0];
395    for (size_t __i = 1; __i < sizeof(unsigned long long) / sizeof(__storage_type); ++__i)
396        __r |= static_cast<unsigned long long>(__first_[__i]) << (sizeof(__storage_type) * CHAR_BIT);
397    return __r;
398}
399
400template <size_t _N_words, size_t _Size>
401_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool
402__bitset<_N_words, _Size>::all() const _NOEXCEPT
403{
404    // do middle whole words
405    size_type __n = _Size;
406    __const_storage_pointer __p = __first_;
407    for (; __n >= __bits_per_word; ++__p, __n -= __bits_per_word)
408        if (~*__p)
409            return false;
410    // do last partial word
411    if (__n > 0)
412    {
413        __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
414        if (~*__p & __m)
415            return false;
416    }
417    return true;
418}
419
420template <size_t _N_words, size_t _Size>
421_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool
422__bitset<_N_words, _Size>::any() const _NOEXCEPT
423{
424    // do middle whole words
425    size_type __n = _Size;
426    __const_storage_pointer __p = __first_;
427    for (; __n >= __bits_per_word; ++__p, __n -= __bits_per_word)
428        if (*__p)
429            return true;
430    // do last partial word
431    if (__n > 0)
432    {
433        __storage_type __m = ~__storage_type(0) >> (__bits_per_word - __n);
434        if (*__p & __m)
435            return true;
436    }
437    return false;
438}
439
440template <size_t _N_words, size_t _Size>
441inline
442size_t
443__bitset<_N_words, _Size>::__hash_code() const _NOEXCEPT
444{
445    size_t __h = 0;
446    for (size_type __i = 0; __i < _N_words; ++__i)
447        __h ^= __first_[__i];
448    return __h;
449}
450
451template <size_t _Size>
452class __bitset<1, _Size>
453{
454public:
455    typedef ptrdiff_t              difference_type;
456    typedef size_t                 size_type;
457    typedef size_type              __storage_type;
458protected:
459    typedef __bitset __self;
460    typedef       __storage_type*  __storage_pointer;
461    typedef const __storage_type*  __const_storage_pointer;
462    static const unsigned __bits_per_word = static_cast<unsigned>(sizeof(__storage_type) * CHAR_BIT);
463
464    friend class __bit_reference<__bitset>;
465    friend class __bit_const_reference<__bitset>;
466    friend class __bit_iterator<__bitset, false>;
467    friend class __bit_iterator<__bitset, true>;
468    friend struct __bit_array<__bitset>;
469
470    __storage_type __first_;
471
472    typedef __bit_reference<__bitset>                  reference;
473    typedef __bit_const_reference<__bitset>            const_reference;
474    typedef __bit_iterator<__bitset, false>            iterator;
475    typedef __bit_iterator<__bitset, true>             const_iterator;
476
477    _LIBCPP_INLINE_VISIBILITY
478    _LIBCPP_CONSTEXPR __bitset() _NOEXCEPT;
479    _LIBCPP_INLINE_VISIBILITY
480    explicit _LIBCPP_CONSTEXPR __bitset(unsigned long long __v) _NOEXCEPT;
481
482    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 reference __make_ref(size_t __pos) _NOEXCEPT
483        {return reference(&__first_, __storage_type(1) << __pos);}
484    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR const_reference __make_ref(size_t __pos) const _NOEXCEPT
485        {return const_reference(&__first_, __storage_type(1) << __pos);}
486    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 iterator __make_iter(size_t __pos) _NOEXCEPT
487        {return iterator(&__first_ + __pos / __bits_per_word, __pos % __bits_per_word);}
488    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 const_iterator __make_iter(size_t __pos) const _NOEXCEPT
489        {return const_iterator(&__first_ + __pos / __bits_per_word, __pos % __bits_per_word);}
490
491    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
492    void operator&=(const __bitset& __v) _NOEXCEPT;
493    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
494    void operator|=(const __bitset& __v) _NOEXCEPT;
495    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
496    void operator^=(const __bitset& __v) _NOEXCEPT;
497
498    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
499    void flip() _NOEXCEPT;
500
501    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
502    unsigned long to_ulong() const;
503    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
504    unsigned long long to_ullong() const;
505
506    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
507    bool all() const _NOEXCEPT;
508    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
509    bool any() const _NOEXCEPT;
510
511    _LIBCPP_INLINE_VISIBILITY
512    size_t __hash_code() const _NOEXCEPT;
513};
514
515template <size_t _Size>
516inline
517_LIBCPP_CONSTEXPR
518__bitset<1, _Size>::__bitset() _NOEXCEPT
519    : __first_(0)
520{
521}
522
523template <size_t _Size>
524inline
525_LIBCPP_CONSTEXPR
526__bitset<1, _Size>::__bitset(unsigned long long __v) _NOEXCEPT
527    : __first_(
528        _Size == __bits_per_word ? static_cast<__storage_type>(__v)
529                                 : static_cast<__storage_type>(__v) & ((__storage_type(1) << _Size) - 1)
530    )
531{
532}
533
534template <size_t _Size>
535inline
536_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void
537__bitset<1, _Size>::operator&=(const __bitset& __v) _NOEXCEPT
538{
539    __first_ &= __v.__first_;
540}
541
542template <size_t _Size>
543inline
544_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void
545__bitset<1, _Size>::operator|=(const __bitset& __v) _NOEXCEPT
546{
547    __first_ |= __v.__first_;
548}
549
550template <size_t _Size>
551inline
552_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void
553__bitset<1, _Size>::operator^=(const __bitset& __v) _NOEXCEPT
554{
555    __first_ ^= __v.__first_;
556}
557
558template <size_t _Size>
559inline
560_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void
561__bitset<1, _Size>::flip() _NOEXCEPT
562{
563    __storage_type __m = ~__storage_type(0) >> (__bits_per_word - _Size);
564    __first_ = ~__first_;
565    __first_ &= __m;
566}
567
568template <size_t _Size>
569inline
570_LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long
571__bitset<1, _Size>::to_ulong() const
572{
573    return __first_;
574}
575
576template <size_t _Size>
577inline
578_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long
579__bitset<1, _Size>::to_ullong() const
580{
581    return __first_;
582}
583
584template <size_t _Size>
585inline
586_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool
587__bitset<1, _Size>::all() const _NOEXCEPT
588{
589    __storage_type __m = ~__storage_type(0) >> (__bits_per_word - _Size);
590    return !(~__first_ & __m);
591}
592
593template <size_t _Size>
594inline
595_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 bool
596__bitset<1, _Size>::any() const _NOEXCEPT
597{
598    __storage_type __m = ~__storage_type(0) >> (__bits_per_word - _Size);
599    return __first_ & __m;
600}
601
602template <size_t _Size>
603inline
604size_t
605__bitset<1, _Size>::__hash_code() const _NOEXCEPT
606{
607    return __first_;
608}
609
610template <>
611class __bitset<0, 0>
612{
613public:
614    typedef ptrdiff_t              difference_type;
615    typedef size_t                 size_type;
616    typedef size_type              __storage_type;
617protected:
618    typedef __bitset __self;
619    typedef       __storage_type*  __storage_pointer;
620    typedef const __storage_type*  __const_storage_pointer;
621    static const unsigned __bits_per_word = static_cast<unsigned>(sizeof(__storage_type) * CHAR_BIT);
622
623    friend class __bit_reference<__bitset>;
624    friend class __bit_const_reference<__bitset>;
625    friend class __bit_iterator<__bitset, false>;
626    friend class __bit_iterator<__bitset, true>;
627    friend struct __bit_array<__bitset>;
628
629    typedef __bit_reference<__bitset>                  reference;
630    typedef __bit_const_reference<__bitset>            const_reference;
631    typedef __bit_iterator<__bitset, false>            iterator;
632    typedef __bit_iterator<__bitset, true>             const_iterator;
633
634    _LIBCPP_INLINE_VISIBILITY
635    _LIBCPP_CONSTEXPR __bitset() _NOEXCEPT;
636    _LIBCPP_INLINE_VISIBILITY
637    explicit _LIBCPP_CONSTEXPR __bitset(unsigned long long) _NOEXCEPT;
638
639    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 reference __make_ref(size_t) _NOEXCEPT
640        {return reference(nullptr, 1);}
641    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR const_reference __make_ref(size_t) const _NOEXCEPT
642        {return const_reference(nullptr, 1);}
643    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 iterator __make_iter(size_t) _NOEXCEPT
644        {return iterator(nullptr, 0);}
645    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 const_iterator __make_iter(size_t) const _NOEXCEPT
646        {return const_iterator(nullptr, 0);}
647
648    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 void operator&=(const __bitset&) _NOEXCEPT {}
649    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 void operator|=(const __bitset&) _NOEXCEPT {}
650    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 void operator^=(const __bitset&) _NOEXCEPT {}
651
652    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 void flip() _NOEXCEPT {}
653
654    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long to_ulong() const {return 0;}
655    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 unsigned long long to_ullong() const {return 0;}
656
657    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 bool all() const _NOEXCEPT {return true;}
658    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 bool any() const _NOEXCEPT {return false;}
659
660    _LIBCPP_INLINE_VISIBILITY size_t __hash_code() const _NOEXCEPT {return 0;}
661};
662
663inline
664_LIBCPP_CONSTEXPR
665__bitset<0, 0>::__bitset() _NOEXCEPT
666{
667}
668
669inline
670_LIBCPP_CONSTEXPR
671__bitset<0, 0>::__bitset(unsigned long long) _NOEXCEPT
672{
673}
674
675template <size_t _Size> class _LIBCPP_TEMPLATE_VIS bitset;
676template <size_t _Size> struct hash<bitset<_Size> >;
677
678template <size_t _Size>
679class _LIBCPP_TEMPLATE_VIS bitset
680    : private __bitset<_Size == 0 ? 0 : (_Size - 1) / (sizeof(size_t) * CHAR_BIT) + 1, _Size>
681{
682public:
683    static const unsigned __n_words = _Size == 0 ? 0 : (_Size - 1) / (sizeof(size_t) * CHAR_BIT) + 1;
684    typedef __bitset<__n_words, _Size> base;
685
686public:
687    typedef typename base::reference       reference;
688    typedef typename base::const_reference const_reference;
689
690    // 23.3.5.1 constructors:
691    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR bitset() _NOEXCEPT {}
692    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
693        bitset(unsigned long long __v) _NOEXCEPT : base(__v) {}
694    template<class _CharT, class = __enable_if_t<_IsCharLikeType<_CharT>::value> >
695    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
696        explicit bitset(const _CharT* __str,
697                        typename basic_string<_CharT>::size_type __n = basic_string<_CharT>::npos,
698                        _CharT __zero = _CharT('0'), _CharT __one = _CharT('1'));
699    template<class _CharT, class _Traits, class _Allocator>
700    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
701        explicit bitset(const basic_string<_CharT,_Traits,_Allocator>& __str,
702                        typename basic_string<_CharT,_Traits,_Allocator>::size_type __pos = 0,
703                        typename basic_string<_CharT,_Traits,_Allocator>::size_type __n =
704                                (basic_string<_CharT,_Traits,_Allocator>::npos),
705                        _CharT __zero = _CharT('0'), _CharT __one = _CharT('1'));
706
707    // 23.3.5.2 bitset operations:
708    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
709    bitset& operator&=(const bitset& __rhs) _NOEXCEPT;
710    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
711    bitset& operator|=(const bitset& __rhs) _NOEXCEPT;
712    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
713    bitset& operator^=(const bitset& __rhs) _NOEXCEPT;
714    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
715    bitset& operator<<=(size_t __pos) _NOEXCEPT;
716    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
717    bitset& operator>>=(size_t __pos) _NOEXCEPT;
718    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
719    bitset& set() _NOEXCEPT;
720    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
721    bitset& set(size_t __pos, bool __val = true);
722    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
723    bitset& reset() _NOEXCEPT;
724    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
725    bitset& reset(size_t __pos);
726    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
727    bitset  operator~() const _NOEXCEPT;
728    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
729    bitset& flip() _NOEXCEPT;
730    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
731    bitset& flip(size_t __pos);
732
733    // element access:
734#ifdef _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL
735    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR            bool operator[](size_t __p) const {return base::__make_ref(__p);}
736#else
737    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR const_reference operator[](size_t __p) const {return base::__make_ref(__p);}
738#endif
739    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 reference operator[](size_t __p)       {return base::__make_ref(__p);}
740    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
741    unsigned long to_ulong() const;
742    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
743    unsigned long long to_ullong() const;
744    template <class _CharT, class _Traits, class _Allocator>
745    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
746        basic_string<_CharT, _Traits, _Allocator> to_string(_CharT __zero = _CharT('0'),
747                                                            _CharT __one = _CharT('1')) const;
748    template <class _CharT, class _Traits>
749        _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
750        basic_string<_CharT, _Traits, allocator<_CharT> > to_string(_CharT __zero = _CharT('0'),
751                                                                    _CharT __one = _CharT('1')) const;
752    template <class _CharT>
753        _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
754        basic_string<_CharT, char_traits<_CharT>, allocator<_CharT> > to_string(_CharT __zero = _CharT('0'),
755                                                                                _CharT __one = _CharT('1')) const;
756    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
757    basic_string<char, char_traits<char>, allocator<char> > to_string(char __zero = '0',
758                                                                      char __one = '1') const;
759    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
760    size_t count() const _NOEXCEPT;
761    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR size_t size() const _NOEXCEPT {return _Size;}
762    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
763    bool operator==(const bitset& __rhs) const _NOEXCEPT;
764    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
765    bool operator!=(const bitset& __rhs) const _NOEXCEPT;
766    _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
767    bool test(size_t __pos) const;
768    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
769    bool all() const _NOEXCEPT;
770    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
771    bool any() const _NOEXCEPT;
772    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23 bool none() const _NOEXCEPT {return !any();}
773    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
774    bitset operator<<(size_t __pos) const _NOEXCEPT;
775    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
776    bitset operator>>(size_t __pos) const _NOEXCEPT;
777
778private:
779
780    _LIBCPP_INLINE_VISIBILITY
781    size_t __hash_code() const _NOEXCEPT {return base::__hash_code();}
782
783    friend struct hash<bitset>;
784};
785
786template <size_t _Size>
787template<class _CharT, class>
788_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
789bitset<_Size>::bitset(const _CharT* __str,
790                      typename basic_string<_CharT>::size_type __n,
791                      _CharT __zero, _CharT __one)
792{
793    size_t __rlen = _VSTD::min(__n, char_traits<_CharT>::length(__str));
794    for (size_t __i = 0; __i < __rlen; ++__i)
795        if (__str[__i] != __zero && __str[__i] != __one)
796            __throw_invalid_argument("bitset string ctor has invalid argument");
797
798    size_t _Mp = _VSTD::min(__rlen, _Size);
799    size_t __i = 0;
800    for (; __i < _Mp; ++__i)
801    {
802        _CharT __c = __str[_Mp - 1 - __i];
803        (*this)[__i] = (__c == __one);
804    }
805    _VSTD::fill(base::__make_iter(__i), base::__make_iter(_Size), false);
806}
807
808template <size_t _Size>
809template<class _CharT, class _Traits, class _Allocator>
810_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
811bitset<_Size>::bitset(const basic_string<_CharT,_Traits,_Allocator>& __str,
812       typename basic_string<_CharT,_Traits,_Allocator>::size_type __pos,
813       typename basic_string<_CharT,_Traits,_Allocator>::size_type __n,
814       _CharT __zero, _CharT __one)
815{
816    if (__pos > __str.size())
817        __throw_out_of_range("bitset string pos out of range");
818
819    size_t __rlen = _VSTD::min(__n, __str.size() - __pos);
820    for (size_t __i = __pos; __i < __pos + __rlen; ++__i)
821        if (!_Traits::eq(__str[__i], __zero) && !_Traits::eq(__str[__i], __one))
822            __throw_invalid_argument("bitset string ctor has invalid argument");
823
824    size_t _Mp = _VSTD::min(__rlen, _Size);
825    size_t __i = 0;
826    for (; __i < _Mp; ++__i)
827    {
828        _CharT __c = __str[__pos + _Mp - 1 - __i];
829        (*this)[__i] = _Traits::eq(__c, __one);
830    }
831    _VSTD::fill(base::__make_iter(__i), base::__make_iter(_Size), false);
832}
833
834template <size_t _Size>
835inline
836_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
837bitset<_Size>&
838bitset<_Size>::operator&=(const bitset& __rhs) _NOEXCEPT
839{
840    base::operator&=(__rhs);
841    return *this;
842}
843
844template <size_t _Size>
845inline
846_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
847bitset<_Size>&
848bitset<_Size>::operator|=(const bitset& __rhs) _NOEXCEPT
849{
850    base::operator|=(__rhs);
851    return *this;
852}
853
854template <size_t _Size>
855inline
856_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
857bitset<_Size>&
858bitset<_Size>::operator^=(const bitset& __rhs) _NOEXCEPT
859{
860    base::operator^=(__rhs);
861    return *this;
862}
863
864template <size_t _Size>
865_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
866bitset<_Size>&
867bitset<_Size>::operator<<=(size_t __pos) _NOEXCEPT
868{
869    __pos = _VSTD::min(__pos, _Size);
870    _VSTD::copy_backward(base::__make_iter(0), base::__make_iter(_Size - __pos), base::__make_iter(_Size));
871    _VSTD::fill_n(base::__make_iter(0), __pos, false);
872    return *this;
873}
874
875template <size_t _Size>
876_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
877bitset<_Size>&
878bitset<_Size>::operator>>=(size_t __pos) _NOEXCEPT
879{
880    __pos = _VSTD::min(__pos, _Size);
881    _VSTD::copy(base::__make_iter(__pos), base::__make_iter(_Size), base::__make_iter(0));
882    _VSTD::fill_n(base::__make_iter(_Size - __pos), __pos, false);
883    return *this;
884}
885
886template <size_t _Size>
887inline
888_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
889bitset<_Size>&
890bitset<_Size>::set() _NOEXCEPT
891{
892    _VSTD::fill_n(base::__make_iter(0), _Size, true);
893    return *this;
894}
895
896template <size_t _Size>
897_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
898bitset<_Size>&
899bitset<_Size>::set(size_t __pos, bool __val)
900{
901    if (__pos >= _Size)
902        __throw_out_of_range("bitset set argument out of range");
903
904    (*this)[__pos] = __val;
905    return *this;
906}
907
908template <size_t _Size>
909inline
910_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
911bitset<_Size>&
912bitset<_Size>::reset() _NOEXCEPT
913{
914    _VSTD::fill_n(base::__make_iter(0), _Size, false);
915    return *this;
916}
917
918template <size_t _Size>
919_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
920bitset<_Size>&
921bitset<_Size>::reset(size_t __pos)
922{
923    if (__pos >= _Size)
924        __throw_out_of_range("bitset reset argument out of range");
925
926    (*this)[__pos] = false;
927    return *this;
928}
929
930template <size_t _Size>
931inline
932_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
933bitset<_Size>
934bitset<_Size>::operator~() const _NOEXCEPT
935{
936    bitset __x(*this);
937    __x.flip();
938    return __x;
939}
940
941template <size_t _Size>
942inline
943_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
944bitset<_Size>&
945bitset<_Size>::flip() _NOEXCEPT
946{
947    base::flip();
948    return *this;
949}
950
951template <size_t _Size>
952_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
953bitset<_Size>&
954bitset<_Size>::flip(size_t __pos)
955{
956    if (__pos >= _Size)
957        __throw_out_of_range("bitset flip argument out of range");
958
959    reference r = base::__make_ref(__pos);
960    r = ~r;
961    return *this;
962}
963
964template <size_t _Size>
965inline
966_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
967unsigned long
968bitset<_Size>::to_ulong() const
969{
970    return base::to_ulong();
971}
972
973template <size_t _Size>
974inline
975_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
976unsigned long long
977bitset<_Size>::to_ullong() const
978{
979    return base::to_ullong();
980}
981
982template <size_t _Size>
983template <class _CharT, class _Traits, class _Allocator>
984_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
985basic_string<_CharT, _Traits, _Allocator>
986bitset<_Size>::to_string(_CharT __zero, _CharT __one) const
987{
988    basic_string<_CharT, _Traits, _Allocator> __r(_Size, __zero);
989    for (size_t __i = 0; __i != _Size; ++__i)
990    {
991        if ((*this)[__i])
992            __r[_Size - 1 - __i] = __one;
993    }
994    return __r;
995}
996
997template <size_t _Size>
998template <class _CharT, class _Traits>
999inline
1000_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
1001basic_string<_CharT, _Traits, allocator<_CharT> >
1002bitset<_Size>::to_string(_CharT __zero, _CharT __one) const
1003{
1004    return to_string<_CharT, _Traits, allocator<_CharT> >(__zero, __one);
1005}
1006
1007template <size_t _Size>
1008template <class _CharT>
1009inline
1010_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
1011basic_string<_CharT, char_traits<_CharT>, allocator<_CharT> >
1012bitset<_Size>::to_string(_CharT __zero, _CharT __one) const
1013{
1014    return to_string<_CharT, char_traits<_CharT>, allocator<_CharT> >(__zero, __one);
1015}
1016
1017template <size_t _Size>
1018inline
1019_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
1020basic_string<char, char_traits<char>, allocator<char> >
1021bitset<_Size>::to_string(char __zero, char __one) const
1022{
1023    return to_string<char, char_traits<char>, allocator<char> >(__zero, __one);
1024}
1025
1026template <size_t _Size>
1027inline
1028_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
1029size_t
1030bitset<_Size>::count() const _NOEXCEPT
1031{
1032    return static_cast<size_t>(_VSTD::__count_bool_true(base::__make_iter(0), _Size));
1033}
1034
1035template <size_t _Size>
1036inline
1037_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
1038bool
1039bitset<_Size>::operator==(const bitset& __rhs) const _NOEXCEPT
1040{
1041    return _VSTD::equal(base::__make_iter(0), base::__make_iter(_Size), __rhs.__make_iter(0));
1042}
1043
1044template <size_t _Size>
1045inline
1046_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
1047bool
1048bitset<_Size>::operator!=(const bitset& __rhs) const _NOEXCEPT
1049{
1050    return !(*this == __rhs);
1051}
1052
1053template <size_t _Size>
1054_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
1055bool
1056bitset<_Size>::test(size_t __pos) const
1057{
1058    if (__pos >= _Size)
1059        __throw_out_of_range("bitset test argument out of range");
1060
1061    return (*this)[__pos];
1062}
1063
1064template <size_t _Size>
1065inline
1066_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
1067bool
1068bitset<_Size>::all() const _NOEXCEPT
1069{
1070    return base::all();
1071}
1072
1073template <size_t _Size>
1074inline
1075_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
1076bool
1077bitset<_Size>::any() const _NOEXCEPT
1078{
1079    return base::any();
1080}
1081
1082template <size_t _Size>
1083inline
1084_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
1085bitset<_Size>
1086bitset<_Size>::operator<<(size_t __pos) const _NOEXCEPT
1087{
1088    bitset __r = *this;
1089    __r <<= __pos;
1090    return __r;
1091}
1092
1093template <size_t _Size>
1094inline
1095_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23
1096bitset<_Size>
1097bitset<_Size>::operator>>(size_t __pos) const _NOEXCEPT
1098{
1099    bitset __r = *this;
1100    __r >>= __pos;
1101    return __r;
1102}
1103
1104template <size_t _Size>
1105inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
1106bitset<_Size>
1107operator&(const bitset<_Size>& __x, const bitset<_Size>& __y) _NOEXCEPT
1108{
1109    bitset<_Size> __r = __x;
1110    __r &= __y;
1111    return __r;
1112}
1113
1114template <size_t _Size>
1115inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
1116bitset<_Size>
1117operator|(const bitset<_Size>& __x, const bitset<_Size>& __y) _NOEXCEPT
1118{
1119    bitset<_Size> __r = __x;
1120    __r |= __y;
1121    return __r;
1122}
1123
1124template <size_t _Size>
1125inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
1126bitset<_Size>
1127operator^(const bitset<_Size>& __x, const bitset<_Size>& __y) _NOEXCEPT
1128{
1129    bitset<_Size> __r = __x;
1130    __r ^= __y;
1131    return __r;
1132}
1133
1134template <size_t _Size>
1135struct _LIBCPP_TEMPLATE_VIS hash<bitset<_Size> >
1136    : public __unary_function<bitset<_Size>, size_t>
1137{
1138    _LIBCPP_INLINE_VISIBILITY
1139    size_t operator()(const bitset<_Size>& __bs) const _NOEXCEPT
1140        {return __bs.__hash_code();}
1141};
1142
1143template <class _CharT, class _Traits, size_t _Size>
1144_LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>&
1145operator>>(basic_istream<_CharT, _Traits>& __is, bitset<_Size>& __x);
1146
1147template <class _CharT, class _Traits, size_t _Size>
1148_LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>&
1149operator<<(basic_ostream<_CharT, _Traits>& __os, const bitset<_Size>& __x);
1150
1151_LIBCPP_END_NAMESPACE_STD
1152
1153_LIBCPP_POP_MACROS
1154
1155#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
1156#  include <concepts>
1157#endif
1158
1159#endif // _LIBCPP_BITSET
1160