23 General utilities library [utilities]

23.14 Function objects [function.objects]

23.14.9 Bitwise operations [bitwise.operations]

23.14.9.2 Class template bit_­or [bitwise.operations.or]

template <class T = void> struct bit_or { constexpr T operator()(const T& x, const T& y) const; };
constexpr T operator()(const T& x, const T& y) const;
Returns: x | y.
template <> struct bit_or<void> { template <class T, class U> constexpr auto operator()(T&& t, U&& u) const -> decltype(std::forward<T>(t) | std::forward<U>(u)); using is_transparent = unspecified; }; template <class T, class U> constexpr auto operator()(T&& t, U&& u) const -> decltype(std::forward<T>(t) | std::forward<U>(u));
Returns: std​::​forward<T>(t) | std​::​forward<U>(u).