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    CWG Issue 1065</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>
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<A NAME="1065"></A><H4>1065.
  
<TT>[[hiding]]</TT> with <TT>[[override]]</TT>
</H4>
<B>Section: </B>_N3225_.7.6.5&#160; [<A href="https://wg21.link/dcl.attr.override">dcl.attr.override</A>]
 &#160;&#160;&#160;

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

 <B>Submitter: </B>Daveed Vandevoorde
 &#160;&#160;&#160;

 <B>Date: </B>2010-03-24<BR>


<P>[Voted into the WP at the November, 2010 meeting as part of paper
N3206.]</P>



<P>The meaning of the <TT>[[base_check]]</TT> and
<TT>[[hiding]]</TT> attributes is defined in terms of hiding as
described in _N4868_.6.4.10 [<A href="https://wg21.link/basic.scope.hiding">basic.scope.hiding</A>].  In that section,
however, hiding is orthogonal to overriding: practically by
definition, a function that overrides a base class virtual
function also hides it.  According to the current specification,
the <TT>[[override]]</TT> and <TT>[[hiding]]</TT> attributes
would always need to be specified together on every overriding
function in a <TT>[[base_check]]</TT> class.  This is presumably
unintended, so the current wording should be amended so that
<TT>[[override]]</TT> implies <TT>[[hiding]]</TT> or some
such.</P>

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