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    CWG Issue 1362</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="1362"></A><H4>1362.
  
Complete type required for implicit conversion to <TT>T&amp;</TT>
</H4>
<B>Section: </B>6.3&#160; [<A href="https://wg21.link/basic.def.odr">basic.def.odr</A>]
 &#160;&#160;&#160;

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

 <B>Submitter: </B>Richard Smith
 &#160;&#160;&#160;

 <B>Date: </B>2011-08-16<BR>


<P>[Voted into the WP at the February, 2012 meeting;
moved to DR at the October, 2012 meeting.]</P>



<P>The requirement in 6.3 [<A href="https://wg21.link/basic.def.odr#4">basic.def.odr</A>] paragraph 4 that a
type <TT>T</TT> must be complete if an expression is implicitly
converted to a pointer to <TT>T</TT> or reference to <TT>T</TT>
inadvertently applies to user-defined conversions, although it was
intended only to refer to built-in conversions.</P>

<P><B>Proposed resolution (August, 2011):</B></P>

<P>Change the indicated bullet of 6.3 [<A href="https://wg21.link/basic.def.odr#4">basic.def.odr</A>] paragraph 4
as follows:</P>

<UL><LI><P>an expression that is not a null pointer constant, and has
type other than <INS><I>cv</I></INS> <TT>void*</TT>, is converted to
the type pointer to <TT>T</TT> or reference to <TT>T</TT> using
<DEL>an implicit</DEL> <INS>a standard</INS> conversion (
7.3 [<A href="https://wg21.link/conv">conv</A>]), a <TT>dynamic_cast</TT> (7.6.1.7 [<A href="https://wg21.link/expr.dynamic.cast">expr.dynamic.cast</A>]) or a <TT>static_cast</TT> (7.6.1.9 [<A href="https://wg21.link/expr.static.cast">expr.static.cast</A>]),
or</P></LI></UL>

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