Creating a coroutine task type for asynchronous computations
A major component of the C++20 standard is represented by coroutines. Simply put, coroutines are functions that can be suspended and resumed. Coroutines are an alternative to writing asynchronous code. They help simplify asynchronous I/O code, lazy computations, or event-driven applications. When a coroutine is suspended, the execution returns to the caller, and the data necessary to resume the coroutine is stored separately from the stack. For this reason, the C++20 coroutines are called stackless. Unfortunately, the C++20 standard does not define actual coroutine types and only a framework for building them. This makes writing asynchronous code with coroutines difficult without relying on third-party components.
In this recipe, you will learn how to write a coroutine task type that represents an asynchronous computation, which starts executing when the task is awaited.
