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