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std::multiplies(3)	       C++ Standard Libary	      std::multiplies(3)

NAME
     std::multiplies - std::multiplies

Synopsis
	Defined in header <functional>
	template<>			(since C++14)
	class multiplies<void>;

	std::multiplies<void>  is a specialization of std::multiplies with para-
     meter and
	return type deduced.

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

     std::multiplies<void>::operator()

	template< class T, class U >

	constexpr auto operator()( T&& lhs, U&& rhs ) const

	    -> decltype(std::forward<T>(lhs) * std::forward<U>(rhs));

	Returns the product of lhs and rhs.

Parameters
	lhs, rhs - values to multiply

Return value
	std::forward<T>(lhs) * std::forward<U>(rhs).

Example
     // Run this code

      #include <complex>
      #include <functional>
      #include <iostream>

      int main()
      {
	  auto complex_multiplies = std::multiplies<void>{}; //  avoida  can  be
     omitted
	  constexpr std::complex z1{1.0, 2.0}, z2{3.0, 4.0};

	  std::cout << std::showpos
		    << complex_multiplies(z1, z2) << ' ' << z1 * z2 << '\n'
		    << complex_multiplies(z1, 5.) << ' ' << z1 * 5. << '\n'
		    << complex_multiplies(5., z1) << ' ' << 5. * z1 << '\n';
      }

Output:
      (-5,+10) (-5,+10)
      (+5,+10) (+5,+10)
      (+5,+10) (+5,+10)

http://cppreference.com 	   2024.06.10		      std::multiplies(3)
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