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    CWG Issue 32</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="32"></A><H4>32.
  
Clarification of explicit instantiation of non-exported templates
</H4>
<B>Section: </B>Clause 13&#160; [<A href="https://wg21.link/temp">temp</A>]
 &#160;&#160;&#160;

 <B>Status: </B>TC1
 &#160;&#160;&#160;

 <B>Submitter: </B>Daveed Vandevoorde
 &#160;&#160;&#160;

 <B>Date: </B>10 Jul 1998<BR>





<P>Section Clause 13 [<A href="https://wg21.link/temp#8">temp</A>] paragraph 8
says:
<BLOCKQUOTE>A non-exported template that is neither explicitly specialized
<U>nor explicitly instantiated</U> 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>]
) or <U>explicitly
instantiated</U> (13.9.3 [<A href="https://wg21.link/temp.explicit">temp.explicit</A>]
); no diagnostic is required.</BLOCKQUOTE>
Shouldn't the first underlined phrase be omitted to avoid conflict with
the second underlined phrase?</P>

<P><U>From John Spicer:</U></P>

<P>The first "explicitly instantiated" is intended to mean "explicitly instantiated
in some other translation unit".</P>

<P>
<B>Proposed Resolution (04/99):</B>
Change the text in Clause 13 [<A href="https://wg21.link/temp#8">temp</A>] paragraph 8
from:</P>
<BLOCKQUOTE>A non-exported template that is neither explicitly specialized
nor explicitly instantiated 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>]
) or explicitly instantiated
(13.9.3 [<A href="https://wg21.link/temp.explicit">temp.explicit</A>]
); no diagnostic is required.</BLOCKQUOTE>
to:
<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. [<I>Note:</I> See also 13.9.3 [<A href="https://wg21.link/temp.explicit">temp.explicit</A>]
]</BLOCKQUOTE>
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