std::function<R(Args...)>::swap

Since C++11

Exchanges the stored callable objects of *this and other.

# Declarations

void swap( function& other ) noexcept;

(since C++11)

# Parameters

other: function wrapper to exchange the stored callable object with

# Return value

(none)

# Example

#include <functional>
#include <iostream>
 
void foo(const char* str, int x)
{
    std::cout << "foo(\"" << str << "\", " << x << ")\n";
}
 
void bar(const char* str, int x)
{
    std::cout << "bar(\"" << str << "\", " << x << ")\n";
}
 
int main()
{
    std::function<void(const char*, int)> f1{foo};
    std::function<void(const char*, int)> f2{bar};
 
    f1("f1", 1);
    f2("f2", 2);
 
    std::cout << "f1.swap(f2);\n";
    f1.swap(f2);
 
    f1("f1", 1);
    f2("f2", 2);
}

# See also

swap