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2 mars 2016 · The future statement is intended to ease migration to future versions of Python that introduce incompatible changes to the language. It allows use of the new features on a per-module basis before the release in which the feature becomes standard. If you actually want to import the __future__ module, just do.
12 mars 2024 · 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, or std::promise) can provide a std::future object to the creator of that asynchronous operation. The creator of the asynchronous operation can then use a variety of ...
22 févr. 2024 · std::future<void> specialization. void get(); (3) (since C++11) 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. If valid () is false before the call to this function, the behavior is undefined.
27 août 2021 · atomic_compare_exchange_weak atomic_compare_exchange_weak_explicit atomic_compare_exchange_strong atomic_compare_exchange_strong_explicit
19 oct. 2018 · This future feature is also missing in Python 3.6. Why isn't it back ported? If I use annotations, they are widely supported in 3.7, so no need for a future. If I run my code on an older Python, both, the annotations and the future are not supported. So why this future? –
26 avr. 2014 · 2. Or, if you're using Callable<T> rather than Runnable, instead try supplyAsync: CompletableFuture<T> future = CompletableFuture.supplyAsync (myCallable, myExecutor); – Sam Mefford. CommentedApr 28, 2020 at 22:38. 1. supplyAsync receives a Supplier. The code will not compile if you attempt to pass in a Callable.
11 févr. 2016 · The main advantage of CompletableFuture over normal Future is that CompletableFuture takes advantage of the extremely powerful stream API and gives you callback handlers to chain your tasks, which is absolutely absent if you use normal Future. That along with providing asynchronous architecture, CompletableFuture is the way to go for handling computation heavy map-reduce tasks, without ...
1 avr. 2016 · ensure_future is a method to create Task from coroutine. It creates tasks in different ways based on argument (including using of create_task for coroutines and future-like objects). create_task is an abstract method of AbstractEventLoop. Different event loops can implement this function different ways.
5 juin 2012 · You could always write a little wrapper if you want a more convenient syntax: template<typename R> bool is_ready (std::future<R> const& f) { return f.wait_for (std::chrono::seconds (0)) == std::future_status::ready; } N.B. if the function is deferred this will never return true, so it's probably better to check wait_for directly in the case ...
27 août 2021 · std::future<T>:: wait_for. wait_for. Waits for the result to become available. Blocks until specified timeout_duration has elapsed or the result becomes available, whichever comes first. The return value identifies the state of the result. If the future is the result of a call to std::async that used lazy evaluation, this function returns ...
