Don't show suggestion if slice pattern is enclosed by any patterns

Author: long-long-float

compiler/rustc_hir_typeck/src/pat.rs

@@ -2341,9 +2341,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 _ => (),
             }
 
-            let enclosure_is_struct =
-                parent_kind.map_or(false, |enclosure| matches!(enclosure, PatKind::Struct(..)));
-
+            let enclosure_is_struct = parent_kind.is_some();
             if is_slice_or_array_or_vector && !enclosure_is_struct {
                 err.span_suggestion(
                     span,