Namespaces
Variants
Views
Actions

std::multiplies

From cppreference.com
< cpp‎ | utility‎ | functional
 
 
 
Function objects


Function wrappers
(C++11)
(C++11)
Bind
(C++11)
Reference wrappers
(C++11)(C++11)
Operator wrappers
Negators
Deprecated binders and adaptors
(deprecated)
(deprecated)
(deprecated)
(deprecated)
(deprecated)(deprecated)(deprecated)(deprecated)
(deprecated)
(deprecated)(deprecated)(deprecated)(deprecated)
(deprecated)(deprecated)
(deprecated)(deprecated)
 

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

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

Contents

[edit] Specializations

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
(class template specialization) [edit]
(since C++14)

[edit] Member types

Type Definition
result_type T
first_argument_type T
second_argument_type T

[edit] Member functions

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

std::multiplies::operator()

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.

Parameters

lhs, rhs - values to multiply

Return value

The result of lhs * rhs.

Exceptions

(none)

Possible implementation

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