// run

// Copyright 2020 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 Recv <-chan int

type sliceOf[E any] interface {
	type []E
}

func Append[S sliceOf[T], T any](s S, t ...T) S {
	return append(s, t...)
}

func main() {
	a := Append([]Recv{nil}, Recv(nil))
	if len(a) != 2 || a[0] != nil || a[1] != nil {
		panic(a)
	}
}