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    CWG Issue 116</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="116"></A><H4>116.
  
Equivalent and functionally-equivalent function templates
</H4>
<B>Section: </B>13.7.7.2&#160; [<A href="https://wg21.link/temp.over.link">temp.over.link</A>]
 &#160;&#160;&#160;

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

 <B>Submitter: </B>Mike Miller
 &#160;&#160;&#160;

 <B>Date: </B>11 May 1999<BR>





<P>13.7.7.2 [<A href="https://wg21.link/temp.over.link">temp.over.link</A>]
, paragraphs 5 and 6,
describes equivalence and
functional equivalence for expressions involving template
parameters.  As a note in paragraph 5 points out, such
expressions may involve type parameters as well as non-type
parameters.</P>

<P>Paragraph 7, however, describes the equivalence of function
templates only with respect to non-type template parameters.
It appears to be unspecified how to determine the equivalence
of template functions whose types involve expressions that
use template type parameters.</P>

<PRE>
    template &lt;int I&gt; struct S { };

    // The following two declarations are equivalent:
    template &lt;int I&gt; void f(S&lt;I&gt;);
    template &lt;int J&gt; void f(S&lt;J&gt;);

    // The IS doesn't say whether these are equivalent:
    template &lt;class T&gt; void f(S&lt;sizeof(T)&gt;);
    template &lt;class T&gt; void f(S&lt;sizeof(T)&gt;);
</PRE>

<P>
<B>Proposed resolution (10/99):</B>
Remove the three uses of the words "non-type" in
13.7.7.2 [<A href="https://wg21.link/temp.over.link#7">temp.over.link</A>] paragraph 7.
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