<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<TITLE>
    CWG Issue 1692</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="1692"></A><H4>1692.
  
Associated namespaces of doubly-nested classes
</H4>
<B>Section: </B>6.5.4&#160; [<A href="https://wg21.link/basic.lookup.argdep">basic.lookup.argdep</A>]
 &#160;&#160;&#160;

 <B>Status: </B>C++14
 &#160;&#160;&#160;

 <B>Submitter: </B>David Krauss
 &#160;&#160;&#160;

 <B>Date: </B>2013-05-29<BR>


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

<P>According to 6.5.4 [<A href="https://wg21.link/basic.lookup.argdep#2">basic.lookup.argdep</A>] paragraph 2,</P>

<BLOCKQUOTE>

If <TT>T</TT> is a class type (including unions), its associated classes
are: the class itself; the class of which it is a member, if any; and its
direct and indirect base classes. Its associated namespaces are the
namespaces of which its associated classes are members.

</BLOCKQUOTE>

<P>Consider an example like</P>

<PRE>
  struct A {
    struct B {
      struct C { };
    };
  };
</PRE>

<P>
<TT>A</TT> has one associated class, itself, and has the global
namespace as its associated namespace.  <TT>A::B</TT> has two associated
classes, <TT>A</TT> and itself, and by virtue of its association with
<TT>A</TT>, has the global namespace as its associated namespace.
<TT>A::B::C</TT> has two associated classes, <TT>A::B</TT> and itself.
However, because neither <TT>A::B</TT> nor <TT>A::B::C</TT> is a
member of a namespace, <TT>A::B::C</TT> has no associated namespaces.</P>

<P>This seems like a defect.</P>

<P><B>Proposed resolution (September, 2013):</B></P>

<P>This issue is resolved by the resolution of
<A HREF="1691.html">issue 1691</A>.</P>

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