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    CWG Issue 2234</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="2234"></A><H4>2234.
  
Missing rules for <I>simple-template-id</I> as <I>class-name</I>
</H4>
<B>Section: </B>Clause 11&#160; [<A href="https://wg21.link/class">class</A>]
 &#160;&#160;&#160;

 <B>Status: </B>CD5
 &#160;&#160;&#160;

 <B>Submitter: </B>Richard Smith
 &#160;&#160;&#160;

 <B>Date: </B>2016-02-25<BR>


<P>[Accepted as a DR at the March, 2018 (Jacksonville) meeting.]</P>



<P>There does not seem to be a rule that prohibits an example like:</P>

<PRE>
  template&lt;typename T&gt; struct X;
  struct X&lt;int&gt; {
  };
</PRE>

<P><B>Proposed resolution (November, 2017)</B></P>

<P><B>Change Clause 11 [<A href="https://wg21.link/class#1">class</A>] paragraph 1 as follows:</B></P>

<BLOCKQUOTE>

...<INS>A class declaration where the <I>class-name</I> in the
<I>class-head-name</I> is a <I>simple-template-id</I> shall be an explicit
specialization (13.9.4 [<A href="https://wg21.link/temp.expl.spec">temp.expl.spec</A>]) or a partial specialization
(13.7.6 [<A href="https://wg21.link/temp.spec.partial">temp.spec.partial</A>]).</INS> A <I>class-specifier</I>
whose <I>class-head</I> omits the <I>class-head-name</I> defines an unnamed
class. [<I>Note:</I> An unnamed class thus can't be final. &#8212;<I>end
note</I>]

</BLOCKQUOTE>

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