Yes, I started off with the idea that Rue's syntax would be a strict subset of Rust's.
I may eventually diverge from this, but I like Rust's syntax overall, and I don't want to bikeshed syntax right now, I want to work on semantics + compiler internals. The core syntax of Rust is good enough right now.
How is it a subset then if it has the @-prefix? Wait, does Rust's grammar still have the @ and ~ sigils from the pre 1.0 times for pointers?
Out of interest, what's the motivation? What are you hoping to do with Rue that Rust doesn't currently provide?