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    CWG Issue 2124</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="2124"></A><H4>2124.
  
Signature of constructor template
</H4>
<B>Section: </B>3.57&#160; [<A href="https://wg21.link/defns.signature.member.templ">defns.signature.member.templ</A>]
 &#160;&#160;&#160;

 <B>Status: </B>CD4
 &#160;&#160;&#160;

 <B>Submitter: </B>Hubert Tong
 &#160;&#160;&#160;

 <B>Date: </B>2015-05-05<BR>


<P>[Adopted at the February, 2016 meeting.]</P>



<P>According to 3.57 [<A href="https://wg21.link/defns.signature.member.templ">defns.signature.member.templ</A>], the signature of a class
member function template includes:</P>

<BLOCKQUOTE>

name, parameter type list (9.3.4.6 [<A href="https://wg21.link/dcl.fct">dcl.fct</A>]), class of which the
function is a member, <I>cv</I>-qualifiers (if any), <I>ref-qualifier</I> (if
any), return type, and template parameter list

</BLOCKQUOTE>

<P>However, a constructor template does not have a return type.  This
may be relevant to friend declaration matching.</P>

<P><B>Proposed resolution (October, 2015):</B></P>

<P>Change 3.57 [<A href="https://wg21.link/defns.signature.member.templ">defns.signature.member.templ</A>] as follows:</P>

<BLOCKQUOTE>

<B>signature</B><BR>
&lt;class member function template&gt; name, parameter type list (9.3.4.6 [<A href="https://wg21.link/dcl.fct">dcl.fct</A>]), class of which the function is a member,
<I>cv-qualifier</I>s (if any), <I>ref-qualifier</I> (if
any), return type <INS>(if any)</INS>, and template parameter list

</BLOCKQUOTE>

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