# swap(std::stop_source)

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< cpp‎ | thread‎ | stop source

friend void swap( stop_source &lhs, stop_source &rhs ) noexcept; |  | (since C++20)

Overloads the std::swap algorithm for std::stop_source. Exchanges the stop-state of `lhs` with that of `rhs`. Effectively calls lhs.swap(rhs).

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

### Parameters

lhs, rhs | - | `stop_source`s to swap

### Return value

(none)

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