The good news is that the Rust project has recently agreed to write a specification, and has a budget to hire an editor for it. The less good news is that it's

The good news is that the Rust project has recently agreed to write a specification, and has a budget to hire an editor for it. The less good news is that it's likely to take a long time before anything resembling a complete description gets written. You can follow its status at https://github.com/rust-lang/rust/issues/113527 https://github.com/rust-lang/rust/issues/113527