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    CWG Issue 1096</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="1096"></A><H4>1096.
  
Missing requirement for template definitions
</H4>
<B>Section: </B>Clause 13&#160; [<A href="https://wg21.link/temp">temp</A>]
 &#160;&#160;&#160;

 <B>Status: </B>C++11
 &#160;&#160;&#160;

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

 <B>Date: </B>2010-07-28<BR>


<P>[Voted into the WP at the March, 2011 meeting.]</P>



<P>The removal of the <TT>export</TT> keyword inadvertently deleted
the text (previously found in Clause 13 [<A href="https://wg21.link/temp#8">temp</A>] paragraph 8 of
the 2003 Standard),</P>

<BLOCKQUOTE>

A non-exported template must be defined in every
translation unit in which it is implicitly instantiated
(13.9.2 [<A href="https://wg21.link/temp.inst">temp.inst</A>]), unless the corresponding
specialization is explicitly instantiated (13.9.3 [<A href="https://wg21.link/temp.explicit">temp.explicit</A>]) in some translation unit; no diagnostic is
required.

</BLOCKQUOTE>

<P>This requirement must be reinstated.</P>

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

<P>Add the following as a new paragraph following Clause 13 [<A href="https://wg21.link/temp#5">temp</A>] paragraph 5:
</P>

<BLOCKQUOTE>

<INS>A function template, member function of a class template, or
static data member of a class template shall be defined in every
translation unit in which it is implicitly instantiated (13.9.2 [<A href="https://wg21.link/temp.inst">temp.inst</A>]), unless the corresponding specialization is explicitly
instantiated (13.9.3 [<A href="https://wg21.link/temp.explicit">temp.explicit</A>]) in some translation unit;
no diagnostic is required.</INS>

</BLOCKQUOTE>

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