Rust used to have green threading as a language feature - it was only dropped because the language-based support was considered clunky, unduly restrictive and u

Rust used to have green threading as a language feature - it was only dropped because the language-based support was considered clunky, unduly restrictive and ultimately not necessary. This is reimplementing the same use cases in library form, with only minimal support in the form of a custom syntax once the async/await feature goes stable.