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    CWG Issue 1408</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="1408"></A><H4>1408.
  
What is &#8220;the same aggregate initialization?&#8221;
</H4>
<B>Section: </B>12.2.4.3&#160; [<A href="https://wg21.link/over.ics.rank">over.ics.rank</A>]
 &#160;&#160;&#160;

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

 <B>Submitter: </B>Sebastian Redl
 &#160;&#160;&#160;

 <B>Date: </B>2011-10-24<BR>


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



<P>Bullet 2 of 12.2.4.3 [<A href="https://wg21.link/over.ics.rank#3">over.ics.rank</A>] paragraph 3 reads,</P>

<UL><LI><P>User-defined conversion sequence <TT>U1</TT> is a
better conversion sequence than another user-defined conversion
sequence <TT>U2</TT> if they contain the same user-defined
conversion function or constructor or aggregate initialization
and the second standard conversion sequence of <TT>U1</TT> is
better than the second standard conversion sequence of
<TT>U2</TT>.</P></LI></UL>

<P>It is not clear what &#8220;the same aggregate initialization&#8221;
means &#8212; does this require that the same aggregate type is the
target type?</P>

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

<P>Change 12.2.4.3 [<A href="https://wg21.link/over.ics.rank#3.2">over.ics.rank</A>] bullet 3.2 as
follows:</P>

<UL>
<LI><P>Standard conversion sequence <TT>S1</TT> is a better
conversion sequence...</P></LI>

<LI><P>User-defined conversion sequence <TT>U1</TT> is a better
conversion sequence than another user-defined conversion sequence
<TT>U2</TT> if they contain the same user-defined conversion function
or constructor or <INS>they initialize the same class in an</INS>
aggregate initialization and <INS>in either case</INS> the second
standard conversion sequence of <TT>U1</TT> is better than the second
standard conversion sequence of
<TT>U2</TT>. [<I>Example:</I>...</P></LI>

</UL>

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