std::shared_future

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

std::future

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,

std::future<T>::future

2) Move constructor. Constructs a std::future with the shared state of other using move semantics. After construction, other.valid() == false.

std::future<T>::wait_until

If the future is the result of a call to async that used lazy evaluation, this function returns immediately without waiting. The behavior is undefined if valid () is false before the call to this

Talks And Demos: Imagining the Future with Advanced Design in

In this session recorded at Unreal Fest Orlando 2025, Lee Rosario of Brunswick Corporation explains how he uses Twinmotion to present automotive, marine, and conceptual

std::promise

The promise is the "push" end of the promise-future communication channel: the operation that stores a value in the shared state synchronizes-with (as defined in std::memory_order)

How can one await a result of a boxed future?

impl<F> Future for Box<F> where F: Unpin + Future + ?Sized, Boxed futures only implement the Future trait when the future inside the Box implements Unpin. Since your function

std::future<T>::wait

Blocks until the result becomes available. valid() == true after the call. The behavior is undefined if valid() == false before the call to this function.

Cannot build CMake project because "Compatibility with CMake < 3.5

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

std::future<T>::get

The get member function waits (by calling wait ()) until the shared state is ready, then retrieves the value stored in the shared state (if any). Right after calling this function, valid () is false.