Rust

Cannot return value referencing temporary value while lifetime should be valid

Hi everyone, I have a case I am not sure why it is not valid, here is a small recreation of the issue in playground play.rust-lang.org Rust Playground A browser interface to the Rust compiler to experiment with the…

rust-lang/rust: Rust 1.98.0

Language Allow shortening lifetime of &mut when unsize-coercing, even in an invariant position. For example, you can now coerce a Cell<&'long mut i32> to a Cell<&'short mut dyn Send>. Such shortenings were already…

Functional State Machines in Rust: Typestate and Newtype Patterns