Standard library header <bitset>

From cppreference.com
< cpp‎ | header
 
 
Standard Library headers
Note: a slash '/' in a revision mark means that the header was deprecated and/or removed.
Language Support
Concepts
<concepts> (C++20)
Diagnostics
<system_error> (C++11)
General utilities
<bitset>
<tuple> (C++11)
<optional> (C++17)
<any> (C++17)
<variant> (C++17)
<type_traits> (C++11)
<ratio> (C++11)
<chrono> (C++11)
Strings
<charconv> (C++17)
<format> (C++20)

<cwchar>
<cuchar> (C++11)

Localization
<codecvt> (C++11/17)

Containers
<span> (C++20)
<array> (C++11)
<vector>
Iterators
<iterator>
Ranges
<ranges> (C++20)
Algorithms
<execution> (C++17)
Numerics
<bit> (C++20)
<numbers> (C++20)
<cfenv> (C++11)
<cmath>
Input/Output
<cstdio>
<cinttypes> (C++11)
<strstream> (C++98/)

Regular expressions
<regex> (C++11)
Filesystem support
<filesystem> (C++17)
Thread support
<thread> (C++11)
<atomic> (C++11)
<mutex> (C++11)
<shared_mutex> (C++14)
<condition_variable> (C++11)  
<future> (C++11)
<stop_token> (C++20)
<semaphore> (C++20)

<latch> (C++20)
<barrier> (C++20)

C compatibility
<cstdbool> (C++11/17/20)
<ccomplex> (C++11/17/20)
<ctgmath> (C++11/17/20)
<cstdalign> (C++11/17/20)
<ciso646> (until C++20)
<stdatomic.h>
 

This header is part of the general utility library.

Includes

std::basic_string class template
Forward declarations of all classes in the input/output library

Classes

implements constant length bit array
(class template)
hash support for std::bitset
(class template specialization)
Forward declarations
Defined in header <functional>
(C++11)
hash function object
(class template)

Functions

performs binary logic operations on bitsets
(function template)
performs stream input and output of bitsets
(function template)

Synopsis

#include <string>
#include <iosfwd>   // for istream, ostream
 
namespace std {
  template<size_t N> class bitset;
 
  // bitset operators
  template<size_t N>
    constexpr bitset<N> operator&(const bitset<N>&, const bitset<N>&) noexcept;
  template<size_t N>
    constexpr bitset<N> operator|(const bitset<N>&, const bitset<N>&) noexcept;
  template<size_t N>
    constexpr bitset<N> operator^(const bitset<N>&, const bitset<N>&) noexcept;
  template<class CharT, class Traits, size_t N>
    basic_istream<CharT, Traits>&
      operator>>(basic_istream<CharT, Traits>& is, bitset<N>& x);
  template<class CharT, class Traits, size_t N>
    basic_ostream<CharT, Traits>&
      operator<<(basic_ostream<CharT, Traits>& os, const bitset<N>& x);
}

Class template std::bitset

namespace std {
  template<size_t N> class bitset {
  public:
    // bit reference
    class reference {
      friend class bitset;
      constexpr reference() noexcept;
 
    public:
      constexpr reference(const reference&) = default;
      constexpr ~reference();
      constexpr reference& operator=(bool x) noexcept;            // for b[i] = x;
      constexpr reference& operator=(const reference&) noexcept;  // for b[i] = b[j];
      constexpr bool operator~() const noexcept;                  // flips the bit
      constexpr operator bool() const noexcept;                   // for x = b[i];
      constexpr reference& flip() noexcept;                       // for b[i].flip();
    };
 
    // constructors
    constexpr bitset() noexcept;
    constexpr bitset(unsigned long long val) noexcept;
    template<class CharT, class Traits, class Allocator>
      constexpr explicit bitset(
        const basic_string<CharT, Traits, Allocator>& str,
        typename basic_string<CharT, Traits, Allocator>::size_type pos = 0,
        typename basic_string<CharT, Traits, Allocator>::size_type n
          = basic_string<CharT, Traits, Allocator>::npos,
        CharT zero = CharT('0'),
        CharT one = CharT('1'));
    template<class CharT>
      constexpr explicit bitset(
        const CharT* str,
        typename basic_string<CharT>::size_type n = basic_string<CharT>::npos,
        CharT zero = CharT('0'),
        CharT one = CharT('1'));
 
    // bitset operations
    constexpr bitset& operator&=(const bitset& rhs) noexcept;
    constexpr bitset& operator|=(const bitset& rhs) noexcept;
    constexpr bitset& operator^=(const bitset& rhs) noexcept;
    constexpr bitset& operator<<=(size_t pos) noexcept;
    constexpr bitset& operator>>=(size_t pos) noexcept;
    constexpr bitset& set() noexcept;
    constexpr bitset& set(size_t pos, bool val = true);
    constexpr bitset& reset() noexcept;
    constexpr bitset& reset(size_t pos);
    constexpr bitset  operator~() const noexcept;
    constexpr bitset& flip() noexcept;
    constexpr bitset& flip(size_t pos);
 
    // element access
    constexpr constexpr bool operator[](size_t pos) const;        // for b[i];
    constexpr reference operator[](size_t pos);                   // for b[i];
 
    constexpr unsigned long to_ulong() const;
    constexpr unsigned long long to_ullong() const;
    template<class CharT = char,
             class Traits = char_Traits<CharT>,
             class Allocator = allocator<CharT>>
      constexpr basic_string<CharT, Traits, Allocator>
        to_string(CharT zero = CharT('0'), CharT one = CharT('1')) const;
 
    constexpr size_t count() const noexcept;
    constexpr constexpr size_t size() const noexcept;
    constexpr bool operator==(const bitset& rhs) const noexcept;
    constexpr bool test(size_t pos) const;
    constexpr bool all() const noexcept;
    constexpr bool any() const noexcept;
    constexpr bool none() const noexcept;
    constexpr bitset operator<<(size_t pos) const noexcept;
    constexpr bitset operator>>(size_t pos) const noexcept;
  };
 
  // hash support
  template<class T> struct hash;
  template<size_t N> struct hash<bitset<N>>;
}