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    CWG Issue 1270</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="1270"></A><H4>1270.
  
Brace elision in array temporary initialization
</H4>
<B>Section: </B>9.5.5&#160; [<A href="https://wg21.link/dcl.init.list">dcl.init.list</A>]
 &#160;&#160;&#160;

 <B>Status: </B>CD3
 &#160;&#160;&#160;

 <B>Submitter: </B>Jason Merrill
 &#160;&#160;&#160;

 <B>Date: </B>2011-03-23<BR>


<P>[Moved to DR at the October, 2012 meeting.]</P>

<P>
<A HREF="1232.html">Issue 1232</A> extended the language to allow
creation of array temporaries using initializer lists.  However, such
initializer lists must be &#8220;completely braced;&#8221; the elision
of braces described in 9.5.2 [<A href="https://wg21.link/dcl.init.aggr#11">dcl.init.aggr</A>] paragraph 11 applies
only</P>

<BLOCKQUOTE>

<P>In a declaration of the form</P>

<PRE>
  T x = { a };
</PRE>

</BLOCKQUOTE>

<P>This restriction prevents plausible uses like</P>

<PRE>
    array&lt;int, 3&gt; f() {
      return { 1, 2, 3 };
    }
</PRE>

<P><B>Proposed resolution (February, 2012):</B></P>

<P>Change 9.5.2 [<A href="https://wg21.link/dcl.init.aggr#11">dcl.init.aggr</A>] paragraph 11 as follows:</P>

<BLOCKQUOTE>

<P><DEL>In a declaration of the form</DEL></P>

<UL><DEL><TT>T x = { a };</TT></DEL></UL>

<P>
<DEL>braces</DEL> <INS>Braces</INS> can be elided in an
<I>initializer-list</I> as follows.  <DEL>[<I>Footnote:</I> Braces
cannot be elided in other uses of list-initialization. &#8212;<I>end
footnote</I>]</DEL>
</P>

</BLOCKQUOTE>

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