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);
constexpr bool operator[](size_t pos) const;
constexpr bitset::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<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 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;