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    CWG Issue 2550</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="2550"></A><H4>2550.
  
Type "reference to <I>cv</I> <TT>void</TT>" outside of a declarator
</H4>
<B>Section: </B>9.3.4.3&#160; [<A href="https://wg21.link/dcl.ref">dcl.ref</A>]
 &#160;&#160;&#160;

 <B>Status: </B>CD7
 &#160;&#160;&#160;

 <B>Submitter: </B>Jens Maurer
 &#160;&#160;&#160;

 <B>Date: </B>2022-03-13<BR>


<P>[Accepted as a DR at the June, 2023 meeting.]</P>

<P>9.3.4.3 [<A href="https://wg21.link/dcl.ref#1">dcl.ref</A>] paragraph 1 specifies:</P>

<BLOCKQUOTE>

A declarator that specifies the type &#8220;reference to <I>cv</I>
<TT>void</TT>&#8221; is ill-formed.

</BLOCKQUOTE>

<P>A <I>declarator</I> does not contain the
leading <I>decl-specifier-seq</I> of a declaration, so the following
example is not covered by the prohibition:</P>

<PRE>
  void f(void&amp; x);
</PRE>

<P><B>Proposed resolution (approved by CWG 2023-06-15):</B></P>

<P>Change in 9.3.4.3 [<A href="https://wg21.link/dcl.ref#1">dcl.ref</A>] paragraph 1 as follows:</P>

<BLOCKQUOTE>

<DEL>A declarator that specifies</DEL> <INS>Forming</INS> the type
&#8220;reference to <I>cv</I> <TT>void</TT>&#8221; is ill-formed.

</BLOCKQUOTE>

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