std::experimental::promise (library fundamentals TS)
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< cpp | experimental | lib extensions
This page is about the modified version of std::promise with type-erased allocator support provided by the Library Fundamentals TSes. For the version of promise provided by the concurrency TS supporting the std::future improvements made by that TS, see std::experimental::concurrency_v1::promise
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Defined in header
<experimental/future>
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template< class R > class promise;
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(1) | (library fundamentals TS) |
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template
<
class R >
class promise<R&
>
;
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(2) | (library fundamentals TS) |
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template
<>
class promise<
void
>
;
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(3) | (library fundamentals TS) |
std::experimental::fundamentals_v1::promise (and std::experimental::fundamentals_v2::promise) is a modified version of std::promise
Member types
| Member type | Definition |
allocator_type
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std::experimental::erased_type |
Member functions
| constructs the promise object (public member function) |
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| retrieves a pointer to the memory resource used by this object to allocate memory (public member function) |
Non-member function
specializes the swap algorithm (function template) |
Helper classes
| specializes the std::uses_allocator type trait (class template specialization) |
Members identical to std::promise
Member functions
| destructs the promise object (public member function of std::promise<R>) |
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| assigns the shared state (public member function of std::promise<R>) |
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| swaps two promise objects (public member function of std::promise<R>) |
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Getting the result | |
| returns a future associated with the promised result (public member function of std::promise<R>) |
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Setting the result | |
| sets the result to specific value (public member function of std::promise<R>) |
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| sets the result to specific value while delivering the notification only at thread exit (public member function of std::promise<R>) |
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| sets the result to indicate an exception (public member function of std::promise<R>) |
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| sets the result to indicate an exception while delivering the notification only at thread exit (public member function of std::promise<R>) |
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