more strict if

gen/decoder.go

@@ -353,13 +353,14 @@ func getStructFields(t reflect.Type) ([]reflect.StructField, error) {
 			t1 = t1.Elem()
 		}
 
+
 		if t1.Kind() == reflect.Struct {
 			fs, err := getStructFields(t1)
 			if err != nil {
 				return nil, fmt.Errorf("error processing embedded field: %v", err)
 			}
 			efields = mergeStructFields(efields, fs)
-		} else {
+		} else if (t1.Kind() >= reflect.Bool && t1.Kind() < reflect.Complex128) || t1.Kind() == reflect.String {
 			if strings.Contains(f.Name, ".") || unicode.IsUpper([]rune(f.Name)[0]) {
 				fields = append(fields, f)
 			}