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