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go/misc/cgo/errors/err3.go
Daniel Morsing 0f82cfd3f0 cmd/cgo: enforce typing of 0-sized types
cgo represents all 0-sized and unsized types internally as [0]byte. This means that pointers to incomplete types would be interchangable, even if given a name by typedef.

Fixes #7409.

LGTM=iant
R=golang-codereviews, bradfitz, iant
CC=golang-codereviews
https://golang.org/cl/76450043
2014-03-27 20:23:16 +00:00

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Go

// Copyright 2014 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
/*
typedef struct foo foo_t;
typedef struct bar bar_t;
foo_t *foop;
*/
import "C"
func main() {
x := (*C.bar_t)(nil)
C.foop = x // ERROR HERE
}