std::swap(std::any) - cppreference.com
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    std::swap(std::any)

    From cppreference.com
     
    C++
     
    Utilities library
    General utilities
    Relational operators (deprecated in C++20)
    Integer comparison functions
    (C++20)(C++20)(C++20)    
    (C++20)
    Swap and type operations
    (C++20)
    (C++14)
    (C++11)
    (C++23)
    (C++11)
    (C++23)
    (C++11)
    (C++11)
    (C++17)
    Common vocabulary types
    (C++11)
    (C++17)
    (C++17)
    (C++17)
    (C++11)
    (C++11)
    (C++17)
    (C++17)
    (C++23)



     
    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

    Run this code
    #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

    See also