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    CWG Issue 1142</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="1142"></A><H4>1142.
  
<TT>friend</TT> declaration of member function of containing class
</H4>
<B>Section: </B>11.4.2&#160; [<A href="https://wg21.link/class.mfct">class.mfct</A>]
 &#160;&#160;&#160;

 <B>Status: </B>C++11
 &#160;&#160;&#160;

 <B>Submitter: </B>US
 &#160;&#160;&#160;

 <B>Date: </B>2010-08-02<BR><BR>


<P>[Voted into the WP at the November, 2010 meeting.]</P>

<A href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3296.html#US52">N3092 comment
  US&#160;52<BR></A>

<P>The current wording of 11.4.2 [<A href="https://wg21.link/class.mfct">class.mfct</A>] paragraph
7 allows friend declarations to name member functions &#8220;after
their class has been defined.&#8221; This appears to prohibit a
friend declaration in a nested class defined inside its
containing class that names a member function of the
containing class, because the containing class is still
considered to be incomplete at that point.</P>

<P><B>Proposed resolution (September, 2010):</B></P>

<P>Change 11.4.2 [<A href="https://wg21.link/class.mfct#7">class.mfct</A>] paragraph 7 as follows:</P>

<BLOCKQUOTE>

<DEL>Member</DEL> <INS>Previously-declared member</INS> functions may
be mentioned in friend declarations <DEL>after their class has been
defined</DEL>.

</BLOCKQUOTE>

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