I'm trying to learn async/await by implementing my own minimalistic
Future (Ha!), my main source is the Async book chapter 2.
HOWEVER (annoyingly), I've hit some blocks, mainly from the part that involving
futures crate, because not every line of code of the crate is explained.
So I want to ask is there any tutorial/book that can help me to understand
std::future::Future and async/await work without having to dig into
futures crate first?