std::any::swap

 

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std::any

Member functions

any::any

any::~any

any::operator=

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any::emplace

any::reset

any::swap

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any::has_value

any::type

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swap(std::any)

any_cast

make_any

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bad_any_cast

 

void swap( any& other )noexcept;		(since C++17)

Swaps the content of two any objects.

Parameters

other

-

object to swap with

Example

Run this code

#include <any>#include <print>#include <string>#include <string_view>   int main(){std::any a =std::string{"King"};std::any b =std::string_view{"Queen"};std::println("a = {}", std::any_cast<std::string&>(a));std::println("b = {}", std::any_cast<std::string_view&>(b));std::println("swap(a, b)"); a.swap(b);std::println("a = {}", std::any_cast<std::string_view&>(a));std::println("b = {}", std::any_cast<std::string&>(b));}

Output:

a = King b = Queen swap(a, b) a = Queen b = King