Interaction between lifetimes in REPL would probably diminish any advantages REPL has to offer. REPL is easy to do in GC languages, trade off Rust made by choos

Interaction between lifetimes in REPL would probably diminish any advantages REPL has to offer. REPL is easy to do in GC languages, trade off Rust made by choosing not to use GC. Best next thing you can use are tests which are part of Rust's tooling.