23 General utilities library [utilities]

23.14 Function objects [function.objects]

23.14.6 Arithmetic operations [arithmetic.operations]

23.14.6.3 Class template multiplies [arithmetic.operations.multiplies]

template <class T = void> struct multiplies { 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 multiplies<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).