std::swap(std::any)

Defined in header `<any>`
void swap( any& lhs, any& rhs ) noexcept;		(since C++17)

Overloads the std::swap algorithm for std::any. Swaps the content of two any objects by calling lhs.swap(rhs).

Parameters

lhs, rhs

objects to swap

Example

#include <any>
#include <print>
#include <string>

int main()
{
    std::any p = 42, q = std::string{"Bishop"};
    std::println("p: {}, q: {}", std::any_cast<int>(p), std::any_cast<std::string&>(q));
    std::println("swap(p, q)");
    std::swap(p, q);
    std::println("p: {}, q: {}", std::any_cast<std::string&>(p), std::any_cast<int>(q));
}

Output:

p: 42, q: Bishop
swap(p, q)
p: Bishop, q: 42

std::swap(std::any)

Parameters

Example

See also