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go/test/fixedbugs/bug054.go
Russ Cox 49e2087848 insert type assertions when narrowing.
R=r
OCL=24349
CL=24913
2009-02-11 17:55:16 -08:00

42 lines
701 B
Go

// $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 Element interface {
}
type Vector struct {
elem []Element;
}
func (v *Vector) At(i int) Element {
return v.elem[i];
}
type TStruct struct {
name string;
fields *Vector;
}
func (s *TStruct) field(i int) *TStruct {
return s.fields.At(i).(*TStruct);
}
func main() {
v := new(Vector);
v.elem = make([]Element, 10);
t := new(TStruct);
t.name = "hi";
v.elem[0] = t;
s := new(TStruct);
s.name = "foo";
s.fields = v;
if s.field(0).name != "hi" {
panic("bad name")
}
}