std::multiplies (3) - Linux Manuals

std::multiplies: std::multiplies


std::multiplies - std::multiplies


Defined in header <functional>
template< class T > (until C++14)
struct multiplies;
template< class T = void > (since C++14)
struct multiplies;

Function object for performing multiplication. Effectively calls operator* on two instances of type T.


The standard library provides a specialization of std::multiplies when T is not specified, which leaves the parameter types and return type to be deduced.

                 function object implementing x * y deducing argument and return types (since C++14)
multiplies<void> (class template specialization)

Member types

Type Definition (until C++20)
result_type(deprecated in C++17) T
first_argument_type(deprecated in C++17) T
second_argument_type(deprecated in C++17) T

Member functions

           returns the product of two arguments
operator() (public member function)


T operator()( const T& lhs, const T& rhs ) const; (until C++14)
constexpr T operator()( const T& lhs, const T& rhs ) const; (since C++14)

Returns the product of lhs and rhs.


lhs, rhs - values to multiply

Return value

The result of lhs * rhs.



Possible implementation

  constexpr T operator()(const T &lhs, const T &rhs) const
      return lhs * rhs;