1 // +build go1.17
2 3 /*
4 * Copyright 2021 ByteDance Inc.
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 19 package rt
20 21 import (
22 _ `unsafe`
23 )
24 25 func AssertI2I(t *GoType, i GoIface) (r GoIface) {
26 inter := IfaceType(t)
27 tab := i.Itab
28 if tab == nil {
29 return
30 }
31 if (*GoInterfaceType)(tab.it) != inter {
32 tab = GetItab(inter, tab.Vt, true)
33 if tab == nil {
34 return
35 }
36 }
37 r.Itab = tab
38 r.Value = i.Value
39 return
40 }
41 42 43