Pie  |  9.0.0_r8
Golang程序  |  18行  |  246 B 

// Copyright 2013 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 a

type S interface{
	F() T
}

type T struct {
	S
}

type U struct {
	error
}