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// $G $D/$F.go && $L $F.$A && ./$A.out
// Copyright 2009 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 Iputs interface {
puts (s string);
}
// ---------
type Print struct {
whoami int;
put Iputs;
}
func (p *Print) dop() {
print(" print ", p.whoami);
p.put.puts("abc");
}
// ---------
type Bio struct {
whoami int;
put Iputs;
}
func (b *Bio) puts(s string) {
print(" bio ", b.whoami);
b.put.puts(s);
}
// ---------
type File struct {
whoami int;
put Iputs;
}
func (f *File) puts(s string) {
print(" file ", f.whoami, " -- ", s);
}
func
main() {
p := new(Print);
b := new(Bio);
f := new(File);
p.whoami = 1;
p.put = b;
b.whoami = 2;
b.put = f;
f.whoami = 3;
p.dop();
print("\n");
}
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