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    CWG Issue 767</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="767"></A><H4>767.
  
<TT>void</TT> and other unnamed <I>lambda-parameter</I>s
</H4>
<B>Section: </B>7.5.6&#160; [<A href="https://wg21.link/expr.prim.lambda">expr.prim.lambda</A>]
 &#160;&#160;&#160;

 <B>Status: </B>CD2
 &#160;&#160;&#160;

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

 <B>Date: </B>5 February, 2009<BR>


<P>[Voted into the WP at the July, 2009 meeting as part of N2927.]</P>

<P>The grammar in 7.5.6 [<A href="https://wg21.link/expr.prim.lambda">expr.prim.lambda</A>] for <I>lambda-parameter</I>
specifies that a <I>declarator</I> must be present, i.e., that all
<I>lambda-parameter</I>s must be named.  This also has the effect of
prohibiting a lambda like <TT>[](void){}</TT>.  It is not clear that
there is a good reason for these restrictions; programmers could
reasonably expect that <I>lambda-parameter</I>s were like ordinary
function parameters in these regards.
</P>

<P><B>Proposed resolution (July, 2009)</B></P>

<P>See document PL22.16/09-0117 = WG21 N2927.</P>

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