Optimize

crates/ra_cfg/src/cfg_expr.rs

@@ -15,7 +15,7 @@ pub enum CfgExpr {
 
 impl CfgExpr {
     /// Fold the cfg by querying all basic `Atom` and `KeyValue` predicates.
-    pub fn fold(&self, query: &impl Fn(&SmolStr, Option<&SmolStr>) -> bool) -> Option<bool> {
+    pub fn fold(&self, query: &dyn Fn(&SmolStr, Option<&SmolStr>) -> bool) -> Option<bool> {
         match self {
             CfgExpr::Invalid => None,
             CfgExpr::Atom(name) => Some(query(name, None)),