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70 lines
1010 B
70 lines
1010 B
// run
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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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// Test interface assignment.
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package main
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type Iputs interface {
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puts (s string) string;
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}
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// ---------
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type Print struct {
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whoami int;
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put Iputs;
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}
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func (p *Print) dop() string {
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r := " print " + string(p.whoami + '0')
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return r + p.put.puts("abc");
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}
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// ---------
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type Bio struct {
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whoami int;
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put Iputs;
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}
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func (b *Bio) puts(s string) string {
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r := " bio " + string(b.whoami + '0')
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return r + b.put.puts(s);
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}
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// ---------
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type File struct {
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whoami int;
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put Iputs;
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}
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func (f *File) puts(s string) string {
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return " file " + string(f.whoami + '0') + " -- " + s
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}
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func
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main() {
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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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r := p.dop();
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expected := " print 1 bio 2 file 3 -- abc"
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if r != expected {
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panic(r + " != " + expected)
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}
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}
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