| // 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 | |
| type Chan[T any] chan Chan[T] | |
| func (ch Chan[T]) recv() Chan[T] { | |
| return <-ch | |
| } | |
| func main() { | |
| ch := Chan[int](make(chan Chan[int])) | |
| go func() { | |
| ch <- make(Chan[int]) | |
| }() | |
| ch.recv() | |
| } |