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https://github.com/golang/go
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76 lines
832 B
Go
76 lines
832 B
Go
// $G $D/$F.go && $L $F.$A && ./$A.out
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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type Iputs interface
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{
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puts func(s string);
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}
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// ---------
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type Print struct
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{
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whoami int;
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put Iputs;
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}
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func (p *Print)
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dop()
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{
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print " print ", p.whoami;
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p.put.puts("abc");
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}
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// ---------
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type Bio struct
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{
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whoami int;
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put Iputs;
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}
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func (b *Bio)
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puts(s string)
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{
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print " bio ", b.whoami;
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b.put.puts(s);
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}
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// ---------
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type File struct
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{
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whoami int;
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put Iputs;
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}
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func (f *File)
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puts(s string)
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{
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print " file ", f.whoami, " -- ", s;
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}
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func
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main()
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{
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p := new(Print);
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b := new(Bio);
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f := new(File);
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p.whoami = 1;
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p.put = b;
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b.whoami = 2;
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b.put = f;
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f.whoami = 3;
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p.dop();
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print "\n";
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}
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