20 General utilities library [utilities]

20.14 Function objects [function.objects]

20.14.10 Bitwise operations [bitwise.operations]

20.14.10.4 Class template bit_­not [bitwise.operations.not]

🔗
template<class T = void> struct bit_not { constexpr T operator()(const T& x) const; };
🔗
constexpr T operator()(const T& x) const;
1
#
Returns: ~x.
🔗
template<> struct bit_not<void> { template<class T> constexpr auto operator()(T&& t) const -> decltype(~std::forward<T>(t)); using is_transparent = unspecified; };
🔗
template<class T> constexpr auto operator()(T&&) const -> decltype(~std::forward<T>(t));
2
#
Returns: ~std​::​forward<T>(t).