std:: modulus<void>

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( until C++17* )
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( until C++17* )
( until C++17* )
( until C++17* ) ( until C++17* ) ( until C++17* ) ( until C++17* )
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( until C++17* ) ( until C++17* )
( until C++17* ) ( until C++17* )

( until C++17* )
( until C++17* ) ( until C++17* ) ( until C++17* ) ( until C++17* )
( until C++20* )
( until C++20* )
Defined in header <functional>
template <>
class modulus < void > ;
(since C++14)

std:: modulus < void > is a specialization of std::modulus with parameter and return type deduced.

Nested types

Nested type Definition
is_transparent unspecified

Member functions

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

std::modulus<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 remainder of the division of lhs by rhs .

Parameters

lhs, rhs - values to divide

Return value

std:: forward < T > ( lhs ) % std:: forward < U > ( rhs ) .

Example

Run this code 
#include <functional>
#include <iostream>
 
struct M
{
    M(int x) { std::cout << "M(" << x << ");\n"; }
    M() {}
};
 
auto operator%(M, M) { std::cout << "operator%(M, M);\n"; return M{}; }
auto operator%(M, int) { std::cout << "operator%(M, int);\n"; return M{}; }
auto operator%(int, M) { std::cout << "operator%(int, M);\n"; return M{}; }
 
int main()
{
    M m;
 
    // 42 is converted into a temporary object M{42}
    std::modulus<M>{}(m, 42);    // calls operator%(M, M)
 
    // no temporary object
    std::modulus<void>{}(m, 42); // calls operator%(M, int)
    std::modulus<void>{}(42, m); // calls operator%(int, M)
}

Output: 

M(42);
operator%(M, M);
operator%(M, int);
operator%(int, M);
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