Future Perfect Tense Rules

In recent times, future perfecttense rules has become increasingly relevant in various contexts. 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 ...

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. std::future<T>::wait_for - cppreference.com.

If the future is the result of a call to std::async that used lazy evaluation, this function returns immediately without waiting. This function may block for longer than timeout_duration due to scheduling or resource contention delays. It's important to note that, the standard recommends that a steady clock is used to measure the duration. Pandas replace and downcasting deprecation since version 2.2.0.

To opt-in to the future behavior, set `pd.set_option('future.no_silent_downcasting', True)` 0 1 1 0 2 2 3 1 dtype: int64 If I understand the warning correctly, the object dtype is "downcast" to int64. Equally important, perhaps pandas wants me to do this explicitly, but I don't see how I could downcast a string to a numerical type before the replacement happens. 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.

In relation to this, checks if the future refers to a shared state. This is the case only for futures that were not default-constructed or moved from (i.e. returned by std::promise::get_future (), std::packaged_task::get_future () or std::async ()) until the first time get () or share () is called. The behavior is undefined if any member function other than the destructor, the move-assignment operator, or valid is ...

Specifies state of a future as returned by wait_for and wait_until functions of std::future and std::shared_future. What is __future__ in Python used for and how/when to use it, and how .... 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. The behavior is undefined if valid () is false before the call to this function, or Clock does not meet the Clock requirements.

This perspective suggests that, the programs is ill-formed if std::chrono::is_clock_v<Clock> is false.(since C++20) python - asyncio.ensure_future vs. BaseEventLoop.create_task vs.

Old info: ensure_future vs create_task 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.