{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"*rvalue"}]}
        *rvalue = match (op, self.try_eval_bool(a), self.try_eval_bool(b)) {
        let Rvalue::BinaryOp(op @ (BinOp::Eq | BinOp::Ne), box (a, b)) = &*rvalue else { return };
            // Transform "Eq(a, true)" ==> "a"