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    CWG Issue 513</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="513"></A><H4>513.
  
Non-class &#8220;most-derived&#8221; objects
</H4>
<B>Section: </B>6.8.2&#160; [<A href="https://wg21.link/intro.object">intro.object</A>]
 &#160;&#160;&#160;

 <B>Status: </B>CD1
 &#160;&#160;&#160;

 <B>Submitter: </B>Marc Schoolderman
 &#160;&#160;&#160;

 <B>Date: </B>20 Mar 2005<BR>


<P>[Voted into WP at April, 2006 meeting.]</P>

<P>The standard uses &#8220;most derived object&#8221; in some places
(for example, Clause 3 [<A href="https://wg21.link/intro.defs">intro.defs</A>] &#8220;<B>dynamic
type</B>,&#8221; 7.6.2.9 [<A href="https://wg21.link/expr.delete">expr.delete</A>]) to refer to objects of
both class and non-class type. However, 6.8.2 [<A href="https://wg21.link/intro.object">intro.object</A>] only
formally defines it for objects of class type.</P>

<P>Possible fix: Change the wording in 6.8.2 [<A href="https://wg21.link/intro.object#4">intro.object</A>] paragraph 4
from</P>

<BLOCKQUOTE>
an object of a most derived class type is called a most derived object
</BLOCKQUOTE>

<P>to</P>

<BLOCKQUOTE>
an object of a most derived class type, or of non-class type, is called
a most derived object
</BLOCKQUOTE>

<P><B>Proposed resolution (October, 2005):</B></P>

<P>Add the indicated words to 6.8.2 [<A href="https://wg21.link/intro.object#4">intro.object</A>] paragraph 4:</P>

<BLOCKQUOTE>

If a complete object, a data member (11.4 [<A href="https://wg21.link/class.mem">class.mem</A>]), or
an array element is of class type, its type is considered the <I>most
derived</I> class, to distinguish it from the class type of any base
class subobject; an object of a most derived class type<INS>, or of a
non-class type,</INS> is called a <I>most derived object</I>.

</BLOCKQUOTE>

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