new iter-iter iterator and kern.func-info module

dict-iterator.go

@@ -116,8 +116,11 @@ func NewDictIterator(dict *kern.DictType, args []any) (it *DictIterator, err err
 		}
 	}
 
-	dictIt.makeKeys(*dict, sortType)
-	return dictIt, err
+	if err == nil {
+		dictIt.makeKeys(*dict, sortType)
+		it = dictIt
+	}
+	return
 }
 
 func NewMapIterator(m map[any]any) (it *DictIterator) {
@@ -139,7 +142,6 @@ func (it *DictIterator) TypeName() string {
 }
 
 func (it *DictIterator) HasOperation(name string) bool {
-	// yes := name == NextName || name == ResetName || name == IndexName || name == CountName || name == CurrentName
 	yes := slices.Contains([]string{kern.NextName, kern.ResetName, kern.IndexName, kern.CountName, kern.CurrentName, kern.CleanName, kern.KeyName, kern.ValueName}, name)
 	return yes
 }