stateful run_expr

[ide5kllc]

let vm = gluon::new_vm();
vm.get_database_mut().set_implicit_prelude(true);
vm.run_io(true);

vm.run_expr::<()>("ex", r#"
  let x = 23
  ()
"#);

vm.run_expr::<i32>("ex", r#" x "); 

This gets me an error of "UndefinedVariable".

If I want do something "repl-like" where we define something in one command, then reference it in the next, is that possible in gluon ?

I tried reading https://github.com/gluon-lang/gluon/tree/master/repl/src but then got confused when it loads up https://github.com/gluon-lang/gluon/blob/master/repl/src/repl.glu

I'm trying to get a gluon REPL-ish to run on Chrome/wasm. Thus, I can't rely on the "io" stuff for now.