{"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"//"}]}
            // Transform "Eq(a, true)" ==> "a"
        *rvalue = match (op, self.try_eval_bool(a), self.try_eval_bool(b)) {
            (BinOp::Eq, _, Some(true)) => Rvalue::Use(a.clone()),