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Date: Mon, 24 Feb 2003 23:16:00 -0000
From: hg@technosis.de
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Subject: c++/9842: Compile error when accessing a bitfield base class member
X-SW-Source: 2003-02/txt/msg01302.txt.bz2
List-Id: <gcc-prs.sourceware.org>


>Number:         9842
>Category:       c++
>Synopsis:       Compile error when accessing a bitfield base class member
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 24 23:16:01 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Heiko Gerdau
>Release:        gcc version 3.2
>Organization:
>Environment:
SuSe Linux 8.1 (with gcc 3.2) or W2k with mingw-gcc 3.2.2
>Description:
Using the attached code gcc returns the following error:

hg@linux:~> gcc -o bf.exe bf.cpp
bf.cpp: In member function `void B::f()':
bf.cpp:11: illegal pointer to bit-field `A::ib'

It should be possible to access a base class member, even if it's a bitfield.

The file bf.cpp contains the following code:

class A
{
public:
    unsigned int ib:1;
};

class B : public A
{
public:
    unsigned int ib;
    void f(){ A::ib=1;}
};

int main()
{
    B b;
    b.f();
    return (0);
}
>How-To-Repeat:
Just copy the code given above to bf.cpp and run
gcc -o bf.exe bf.cpp
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: