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    CWG Issue 2143</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="2143"></A><H4>2143.
  
Value-dependency via injected-class-name
</H4>
<B>Section: </B>13.8.3.2&#160; [<A href="https://wg21.link/temp.dep.type">temp.dep.type</A>]
 &#160;&#160;&#160;

 <B>Status: </B>C++17
 &#160;&#160;&#160;

 <B>Submitter: </B>Maxim Kartashev
 &#160;&#160;&#160;

 <B>Date: </B>2015-06-16<BR>


<P>[Moved to DR at the November, 2016 meeting.]</P>



<P>There does not appear to be a rule that causes <TT>p</TT>
or <TT>this</TT> to be dependent in the following example:</P>

<PRE>
  template &lt;typename T&gt; struct A {
     void foo() {
        A* p = 0;
        bar(p);    //<SPAN CLASS="cmnt"> will be found by ADL at the point of instantiation</SPAN>
        bar(this); //<SPAN CLASS="cmnt"> same here</SPAN>
     }
  };

  void bar(...);

  int main() {
     A&lt;int&gt; a;
     a.foo();
  }
</PRE>

<P><B>Proposed resolution (February, 2016) [SUPERSEDED]:</B></P>

<P>Change 13.8.3.2 [<A href="https://wg21.link/temp.dep.type#9.7">temp.dep.type</A>] bullet 9.7 as follows:</P>

<BLOCKQUOTE>

<P>A type is dependent if it is</P>

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

<LI><P>
<INS>an injected-type-name (
Clause 11 [<A href="https://wg21.link/class">class</A>]) of a class template or</INS>
a <I>simple-template-id</I> in which either the template
name is a template parameter or any of the template
arguments is a dependent type or an expression that is
type-dependent or value-dependent or is a pack expansion,
or</P></LI>

<LI><P>denoted by...</P></LI>

</UL>

</BLOCKQUOTE>

<P><B>Proposed resolution (March, 2016):</B></P>

<P>Change 13.8.3.2 [<A href="https://wg21.link/temp.dep.type#9.7">temp.dep.type</A>] bullet 9.7 as follows:</P>

<BLOCKQUOTE>

<P>A type is dependent if it is</P>

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

<LI><P>a <I>simple-template-id</I> in which either the template
name is a template parameter or any of the template
arguments is a dependent type or an expression that is
type-dependent or value-dependent or is a pack expansion
<INS>[<I>Note:</I> This includes an
injected-class-name (Clause 11 [<A href="https://wg21.link/class">class</A>]) of a class
template used without a <I>template-argument-list</I>.
&#8212;<I>end note</I>]</INS>, or</P></LI>

<LI><P>denoted by...</P></LI>

</UL>

</BLOCKQUOTE>

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