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    CWG Issue 142</TITLE>
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<P><EM>This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21
  Core Issues List revision 118b.
  See http://www.open-std.org/jtc1/sc22/wg21/ for the official
  list.</EM></P>
<P>2025-09-28</P>
<HR>
<A NAME="142"></A><H4>142.
  
Injection-related errors in access example
</H4>
<B>Section: </B>11.8.3&#160; [<A href="https://wg21.link/class.access.base">class.access.base</A>]
 &#160;&#160;&#160;

 <B>Status: </B>TC1
 &#160;&#160;&#160;

 <B>Submitter: </B>Steve Adamczyk
 &#160;&#160;&#160;

 <B>Date: </B>16 Jul 1999<BR>





<P>In the example in paragraph 3 of
11.8.3 [<A href="https://wg21.link/class.access.base">class.access.base</A>]
, all the references
to <TT>B</TT> in <TT>DD::f()</TT> should be replaced by <TT>::B</TT>.
The reason is that the class name <TT>B</TT> is private in <TT>D</TT>
and thus inaccessible in <TT>DD</TT>.  (The example was probably not
updated when class name injection was added.)</P>

<P><B>Proposed resolution (10/00):</B></P>

<P>Replace the example in
11.8.3 [<A href="https://wg21.link/class.access.base#3">class.access.base</A>] paragraph 3
with:</P>
<PRE>
    class B {
    public:
        int mi;                 // nonstatic member
        static int si;          // static member
    };
    class D: private B {
    };
    class DD: public D {
        void f();
    };
    void DD::f() {
        mi = 3;                 // error: mi is private in D
        si = 3;                 // error: si is private in D
        ::B b;
        b.mi = 3;               // OK (b.mi is different from this-&gt;mi)
        b.si = 3;               // OK (b.si is different from this-&gt;si)
        ::B::si = 3;            // OK
        ::B* bp1 = this;        // error: B is a private base class
        ::B* bp2 = (::B*)this;  // OK with cast
        bp2-&gt;mi = 3;            // OK: access through a pointer to B
    }
</PRE>
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