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cmd/cgo: C struct embedding error #2552

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gopherbot opened this issue Dec 11, 2011 · 7 comments

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@gopherbot
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commented Dec 11, 2011

by matteo.goggi:

1. What is a short input program that triggers the error?
--------------------------------
test.go
--------------------------------
package test

/*
typedef struct cStruct {
        double X;
} cStruct;

double cFunc(cStruct str) {
        return str.X * 100;
}
*/
import "C"

type GoStruct struct {
        C.cStruct
}

func (str GoStruct) GoFunc () float64 {
        return float64(C.cFunc(str.cStruct))
}
--------------------------------
Makefile
--------------------------------
include $(GOROOT)/src/Make.inc

TARG=test
CGOFILES=\
        test.go

include $(GOROOT)/src/Make.pkg
--------------------------------
2. What is the full compiler output?
CGOPKGPATH= cgo --  test.go
touch _obj/_cgo_run
6g   -p test -o _go_.6  _obj/test.cgo1.go _obj/_cgo_gotypes.go
test.go:8[_obj/test.cgo1.go:11]: str.cStruct undefined (type GoStruct has no field or
method cStruct)
make: *** [_go_.6] Error 1

3. What version of the compiler are you using?  (Run it with the -V flag.)

6g version weekly.2011-12-06 10712
@rsc

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commented Dec 12, 2011

Comment 1:

Labels changed: added priority-go1.

@remyoudompheng

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commented Dec 15, 2011

Comment 2:

In Matteo's example, do we expect that str.X is a valid selector? That would be tricky
to implement.
@rsc

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commented Dec 19, 2011

Comment 3:

I think it would be fine to document that C types do not work
as embedded fields.
Russ
@robpike

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commented Jan 13, 2012

Comment 4:

Status changed to Accepted.

@robpike

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commented Jan 13, 2012

Comment 5:

Owner changed to builder@golang.org.

@rsc

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commented Feb 17, 2012

Comment 7:

Status changed to Started.

@rsc

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commented Feb 19, 2012

Comment 8:

This issue was closed by revision 1a0c8fe.

Status changed to Fixed.

@rsc rsc added this to the Go1 milestone Apr 10, 2015

@rsc rsc removed the priority-go1 label Apr 10, 2015

@golang golang locked and limited conversation to collaborators Jun 24, 2016

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