std::stop_callback<Callback>::stop_callback

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std::stop_callback

Member functions
stop_callback::stop_callback
stop_callback::~stop_callback
Deduction guides

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template<class C> explicit stop_callback(conststd::stop_token& st, C&& cb)noexcept(/see below/);	(1)	(since C++20)
template<class C> explicit stop_callback(std::stop_token&& st, C&& cb)noexcept(/see below/);	(2)	(since C++20)
stop_callback(const stop_callback&)= delete;	(3)	(since C++20)
stop_callback( stop_callback&&)= delete;	(4)	(since C++20)

Constructs a newstop_callback object, saving and registering thecb callback function into the givenstd::stop_token's associated stop-state, for later invocation if stop is requested on the associatedstd::stop_source.

1) Constructs astop_callback for the givenststd::stop_token (copied), with the given invocable callback functioncb.

2) Constructs astop_callback for the givenststd::stop_token (moved), with the given invocable callback functioncb.

3,4)stop_callback is neitherCopyConstructible norMoveConstructible.

Both constructors participate overload resolution only ifCallback andC satisfyconstructible_from ofstd::constructible_from<Callback, C>. IfCallback andC satisfy the concept but fail to satisfy its semantic requirement, the behavior is undefined.

[edit]Parameters

st	-	a`std::stop_token` object to register this`stop_callback` object with
cb	-	the type to invoke if stop is requested

[edit]Exceptions

1,2)

noexcept specification:

noexcept(std::is_nothrow_constructible_v<Callback, C>)

Any exception thrown by constructor-initializing the given callback into thestop_callback object.

[edit]Notes

Ifst.stop_requested()==true for the passed-instd::stop_token, then the callback function is invoked in the current thread before the constructor returns.

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