<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<TITLE>
    CWG Issue 886</TITLE>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<STYLE TYPE="text/css">
  INS { text-decoration:none; font-weight:bold; background-color:#A0FFA0 }
  .INS { text-decoration:none; background-color:#D0FFD0 }
  DEL { text-decoration:line-through; background-color:#FFA0A0 }
  .DEL { text-decoration:line-through; background-color: #FFD0D0 }
  @media (prefers-color-scheme: dark) {
    HTML { background-color:#202020; color:#f0f0f0; }
    A { color:#5bc0ff; }
    A:visited { color:#c6a8ff; }
    A:hover, a:focus { color:#afd7ff; }
    INS { background-color:#033a16; color:#aff5b4; }
    .INS { background-color: #033a16; }
    DEL { background-color:#67060c; color:#ffdcd7; }
    .DEL { background-color:#67060c; }
  }
  SPAN.cmnt { font-family:Times; font-style:italic }
</STYLE>
</HEAD>
<BODY>
<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="886"></A><H4>886.
  
Member initializers and aggregates
</H4>
<B>Section: </B>9.5.2&#160; [<A href="https://wg21.link/dcl.init.aggr">dcl.init.aggr</A>]
 &#160;&#160;&#160;

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

 <B>Submitter: </B>Daniel Kr&#252;gler
 &#160;&#160;&#160;

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


<P>[Voted into WP at March, 2010 meeting.]</P>



<P>The current wording of 9.5.2 [<A href="https://wg21.link/dcl.init.aggr#1">dcl.init.aggr</A>] paragraph 1
does not consider <I>brace-or-equal-initializer</I>s on members
as affecting whether a class type is an aggregate or not.
Because in-class member initializers are essentially syntactic
sugar for <I>mem-initializer</I>s, and the presence of a
user-provided constructor disqualifies a class from being an
aggregate, presumably the same should hold true of member
initializers.</P>

<P><B>Proposed resolution (November, 2009):</B></P>

<P>Change 9.5.2 [<A href="https://wg21.link/dcl.init.aggr#1">dcl.init.aggr</A>] paragraph 1 as follows:</P>

<BLOCKQUOTE>

An <I>aggregate</I> is an array or a class (Clause 11 [<A href="https://wg21.link/class">class</A>]) with no user-provided constructors (11.4.5 [<A href="https://wg21.link/class.ctor">class.ctor</A>]), <INS>no <I>brace-or-equal-initializer</I>s for
non-static data members (11.4 [<A href="https://wg21.link/class.mem">class.mem</A>]),</INS> no
private or protected non-static data members (11.8 [<A href="https://wg21.link/class.access">class.access</A>]), no base classes (11.7 [<A href="https://wg21.link/class.derived">class.derived</A>]),
and no virtual functions (11.7.3 [<A href="https://wg21.link/class.virtual">class.virtual</A>]).

</BLOCKQUOTE>

<BR><BR>
</BODY>
</HTML>
