<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<TITLE>
    CWG Issue 1779</TITLE>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<STYLE TYPE="text/css">
  INS { text-decoration:none; font-weight:bold; background-color:#A0FFA0 }
  .INS { text-decoration:none; background-color:#D0FFD0 }
  DEL { text-decoration:line-through; background-color:#FFA0A0 }
  .DEL { text-decoration:line-through; background-color: #FFD0D0 }
  @media (prefers-color-scheme: dark) {
    HTML { background-color:#202020; color:#f0f0f0; }
    A { color:#5bc0ff; }
    A:visited { color:#c6a8ff; }
    A:hover, a:focus { color:#afd7ff; }
    INS { background-color:#033a16; color:#aff5b4; }
    .INS { background-color: #033a16; }
    DEL { background-color:#67060c; color:#ffdcd7; }
    .DEL { background-color:#67060c; }
  }
  SPAN.cmnt { font-family:Times; font-style:italic }
</STYLE>
</HEAD>
<BODY>
<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="1779"></A><H4>1779.
  
Type dependency of <TT>__func__</TT>
</H4>
<B>Section: </B>13.8.3.3&#160; [<A href="https://wg21.link/temp.dep.expr">temp.dep.expr</A>]
 &#160;&#160;&#160;

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

 <B>Submitter: </B>John Spicer
 &#160;&#160;&#160;

 <B>Date: </B>2013-09-25<BR>


<P>[Moved to DR at the November, 2014 meeting.]</P>

<P>The length of the <TT>__func__</TT> array is implementation-defined
but potentially depends on the signature of the function in which it
occurs.  However, <TT>__func__</TT> is not listed among the type-dependent
<I>id-expression</I>s in 13.8.3.3 [<A href="https://wg21.link/temp.dep.expr#3">temp.dep.expr</A>] paragraph 3.</P>

<P><B>Proposed resolution (February, 2014):</B></P>

<P>Change 13.8.3.3 [<A href="https://wg21.link/temp.dep.expr#3">temp.dep.expr</A>] paragraph 3 as follows:</P>

<BLOCKQUOTE>

<P>An <I>id-expression</I> is type-dependent if it contains</P>

<UL>
<LI><P>an <I>identifier</I> associated by name lookup with one or more
declarations declared with a dependent type,</P></LI>

<LI><P>an <I>identifier</I> associated by name lookup with one or more
declarations of member functions of the current instantiation declared with
a return type that contains a placeholder type
(9.2.9.7 [<A href="https://wg21.link/dcl.spec.auto">dcl.spec.auto</A>]),</P></LI>

<LI><P><INS>The <I>identifier</I> <TT>__func__</TT>
(9.6.1 [<A href="https://wg21.link/dcl.fct.def.general">dcl.fct.def.general</A>]) where any enclosing function is a template,
a member of a class template, or a generic lambda,</INS></P></LI>

<LI><P>a <I>template-id</I> that is dependent,</P></LI>

<LI><P>...</P></LI>

</UL>

</BLOCKQUOTE>

<BR><BR>
</BODY>
</HTML>
