golang recursive1 代码
文件路径：/test/interface/recursive1.dir/recursive1.go
// Copyright 2012 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.
// Mutually recursive type definitions imported and used by recursive1.go.
package p
type I1 interface {
F() I2
}
type I2 interface {
I1
}