# std::experimental::ranges::swap (ranges::tagged)

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< cpp‎ | experimental‎ | ranges‎ | utility/tagged

friend constexpr void swap(tagged& lhs, tagged& rhs) noexcept(noexcept(lhs.swap(rhs))) requires Swappable<Base>; |  |

Swap the contents of `*this` and `rhs`, as if by lhs.swap(rhs);.

This function is a hidden friend: it is not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when `tagged` is an associated class of the arguments.

### Notes

Unlike most non-member `swap`s in the standard library, this `swap` is a hidden friend function declared in the body of `tagged`, not a function template. The `tagged` in the function declaration is the injected-class-name.

### See also

swap | swaps the contents of two `tagged` objects (public member function)

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