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- std::future - cppreference. com
The class template std::future provides a mechanism to access the result of asynchronous operations: An asynchronous operation (created via std::async, std::packaged_task, or std::promise) can provide a std::future object to the creator of that asynchronous operation
- std::future lt;T gt;:: future - en. cppreference. com
Constructs a std::future with the shared state of other using move semantics After construction, other valid ( ) == false 3) std::future is not CopyConstructible
- std::shared_future lt;T gt;::shared_future - cppreference. com
2) Constructs a shared future that refers to the same shared state, if any, as other 3,4) Transfers the shared state held by other to * this After the construction, other valid ( ) == false , and this - > valid ( ) returns the same value as other valid ( ) would have returned before the construction
- Cannot build CMake project because Compatibility with CMake lt; 3. 5 has . . .
In this case it does work In general, it probably doesn't I'm wondering how this break in backwards compatibility should in general be navigated Perhaps installing a previous version of CMake is the only way that always works? That would mean that each project in the future should specify the CMake version on which it should be built –
- std::shared_future - cppreference. com
Unlike std::future, which is only moveable (so only one instance can refer to any particular asynchronous result), std::shared_future is copyable and multiple shared future objects may refer to the same shared state Access to the same shared state from multiple threads is safe if each thread does it through its own copy of a shared_future object
- std::future lt;T gt;::valid - cppreference. com
It is valid to move from a future object for which valid() is false Contents 1 Parameters; 2 Return value;
- Whats the difference between a Future and a Promise?
Future vs Promise Future and Promise are proxy object for unknown result Promise completes a Future Promise - write producer of unknown result Future - read consumer of unknown result It has next states: pending, fulfilled, canceled Future has a reference to Promise Future -> Promise As a producer I promise something and responsible for it
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