std:: swap (std::promise)

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std::promise
Defined in header <future>
template < class R >
void swap ( promise < R > & lhs, promise < R > & rhs ) noexcept ;
(since C++11)

Specializes the std::swap algorithm for std::promise . Exchanges the shared state of lhs with that of rhs . Effectively calls lhs. swap ( rhs ) .

Parameters

lhs, rhs - promises whose states to swap

Return value

(none)

Example

This section is incomplete
Reason: no example

See also

swaps two promise objects
(public member function)
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