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    CWG Issue 2674</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="2674"></A><H4>2674.
  
Prohibit explicit object parameters for constructors
</H4>
<B>Section: </B>11.4.5.1&#160; [<A href="https://wg21.link/class.ctor.general">class.ctor.general</A>]
 &#160;&#160;&#160;

 <B>Status: </B>C++23
 &#160;&#160;&#160;

 <B>Submitter: </B>Erich Keane
 &#160;&#160;&#160;

 <B>Date: </B>2022-01-11<BR>


<P>[Accepted at the February, 2023 meeting.]</P>



<P>Constructors are not intended to have explicit object parameters,
but the standard is missing a corresponding prohibition.</P>

<P><B>Proposed resolution (approved by CWG 2023-01-06):</B></P>

<P>Add a new paragraph after 11.4.5.1 [<A href="https://wg21.link/class.ctor.general#7">class.ctor.general</A>] paragraph 7 as
follows:</P>

<BLOCKQUOTE>

<P>A constructor shall not be a coroutine.</P>

<P class="ins">A constructor shall not have an explicit object
parameter (9.3.4.6 [<A href="https://wg21.link/dcl.fct">dcl.fct</A>]).</P>

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