the assign operators, '=' and ':=', can set the value of dict items

kern/dict-type.go

@@ -10,6 +10,8 @@ import (
 	"strings"
 )
 
+const DictTypeName = "dict"
+
 type DictType map[any]any
 
 func IsDict(v any) (ok bool) {
@@ -131,7 +133,7 @@ func (dict *DictType) String() string {
 }
 
 func (dict *DictType) TypeName() string {
-	return "dict"
+	return DictTypeName
 }
 
 func (dict *DictType) HasKey(target any) (ok bool) {