| // run -gcflags=-G=3 | |
| // Copyright 2021 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| package main | |
| func foo[T any](d T) { | |
| switch v := interface{}(d).(type) { | |
| case string: | |
| if v != "x" { | |
| panic("unexpected v: " + v) | |
| } | |
| } | |
| } | |
| func main() { | |
| foo("x") | |
| } |