<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<TITLE>
    CWG Issue 2049</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="2049"></A><H4>2049.
  
List initializer in non-type template default argument
</H4>
<B>Section: </B>13.4.3&#160; [<A href="https://wg21.link/temp.arg.nontype">temp.arg.nontype</A>]
 &#160;&#160;&#160;

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

 <B>Submitter: </B>Ville Voutilainen
 &#160;&#160;&#160;

 <B>Date: </B>2014-11-20<BR>


<P>[ Resolved by paper P2308R1 (Template parameter initialization), adopted in November, 2023. ]</P>



<P>According to 13.4.3 [<A href="https://wg21.link/temp.arg.nontype#1">temp.arg.nontype</A>] paragraph 1,</P>

<BLOCKQUOTE>

A <I>template-argument</I> for a
non-type <I>template-parameter</I> shall be a converted
constant expression (7.7 [<A href="https://wg21.link/expr.const">expr.const</A>]) of the type
of the <I>template-parameter</I>.

</BLOCKQUOTE>

<P>This does not permit an example like:</P>

<PRE>
  template &lt;int* x = {}&gt; struct X {};
</PRE>

<P>which seems inconsistent.</P>

<P>See also issues <A HREF="2450.html">2450</A> and
<A HREF="2459.html">2459</A>.</P>

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