// 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
}
// 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
}