{"ast_node_type":"other","tokens":[{"end":26,"kind":"keyword","start":0,"text":"Ok(IntervalAndTy"}]}
        Ok(IntervalAndTy {
    fn operand_ty_and_eval(&mut self, o: &Operand, locals: &mut Locals) -> Result<IntervalAndTy> {
            interval: self.eval_operand(o, locals)?,