Standard library header - cppreference.com (original) (raw)

This header is part of the general utility library.

[edit] Synopsis

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

[edit] Class template std::bitset

namespace std { template class bitset { public: // bit reference class reference { 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, class Traits> constexpr explicit bitset( basic_string_view<CharT, Traits> str, typename basic_string_view<CharT, Traits>::size_type pos = 0, typename basic_string_view<CharT, Traits>::size_type n = basic_string_view<CharT, Traits>::npos, CharT zero = CharT('0'), CharT one = CharT('1')); template constexpr explicit bitset( const CharT* str, typename basic_string_view::size_type n = basic_string_view::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 operator<<(size_t pos) const noexcept; constexpr bitset operator>>(size_t pos) const 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 bool operator[](size_t pos) const; constexpr reference operator[](size_t pos);   constexpr unsigned long to_ulong() const; constexpr unsigned long long to_ullong() const; template<class CharT = char, class Traits = char_traits, class Allocator = allocator> constexpr basic_string<CharT, Traits, Allocator> to_string(CharT zero = CharT('0'), CharT one = CharT('1')) const;   // observers constexpr size_t count() const noexcept; 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; };   // hash support template struct hash; template struct hash<bitset>; }

[edit] Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.