mirror of
https://github.com/golang/go
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66 lines
871 B
Go
66 lines
871 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 S struct
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{
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a,b int;
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}
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type I1 interface
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{
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f ()int;
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}
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type I2 interface
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{
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g() int;
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f() int;
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}
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func
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(this *S) f()int
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{
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return this.a;
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}
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func
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(this *S) g()int
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{
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return this.b;
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}
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func
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main()
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{
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var i1 I1;
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var i2 I2;
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var g *S;
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s := new(S);
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s.a = 5;
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s.b = 6;
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// call structure
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if s.f() != 5 { panic(11); }
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if s.g() != 6 { panic(12); }
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i1 = s; // convert S to I1
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i2 = i1.(I2); // convert I1 to I2
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// call interface
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if i1.f() != 5 { panic(21); }
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if i2.f() != 5 { panic(22); }
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if i2.g() != 6 { panic(23); }
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g = i1.(*S); // convert I1 to S
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if g != s { panic(31); }
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g = i2.(*S); // convert I2 to S
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if g != s { panic(32); }
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}
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