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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 The creator of the asynchronous operation can then use a variety of methods to query, wait for, or extract a value from the std
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
What is __future__ in Python used for and how when to use it, and how . . . A future statement is a directive to the compiler that a particular module should be compiled using syntax or semantics that will be available in a specified future release of Python 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
python - how to insert from __future__ import annotations in a future . . . However, this is many years in the future, giving affected decorators plenty of time to update their code Make the future import a no-op in the future: Instead of eventually making from __future__ import annotations a SyntaxError, we could make it do nothing instead at some point after Python 3 13 reaches its end-of-life