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    CWG Issue 409</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="409"></A><H4>409.
  
Obsolete paragraph missed by changes for issue 224
</H4>
<B>Section: </B>13.8&#160; [<A href="https://wg21.link/temp.res">temp.res</A>]
 &#160;&#160;&#160;

 <B>Status: </B>CD1
 &#160;&#160;&#160;

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

 <B>Date: </B>18 Apr 2003<BR>


<P>[Voted into WP at October 2004 meeting.]</P>

<P>Paragraph 6 of 13.8 [<A href="https://wg21.link/temp.res">temp.res</A>] is obsolete as result of
<A HREF="224.html">issue 224</A>, and needs to be revised.</P>
<BLOCKQUOTE>
Within  the definition of a class template or within the definition of
a member of a class template, the keyword  typename  is  not  required
when referring to the unqualified name of a previously declared member
of the class template that declares  a  type.   The  keyword  typename
shall always be specified when the member is referred to using a qual-
ified name, even if the qualifier is simply the class  template  name.
[<I>Example:</I>
<PRE>
  template&lt;class T&gt; struct A {
      typedef int B;
      A::B b;                     // ill-formed: typename required before A::B
      void f(A&lt;T&gt;::B);            // ill-formed: typename required before A&lt;T&gt;::B
      typename A::B g();          // OK
  };
</PRE>
]
</BLOCKQUOTE>

<P><B>Proposed Resolution:</B></P>
<P>
Change 13.8 [<A href="https://wg21.link/temp.res#6">temp.res</A>] paragraph 6 as follows</P>
<BLOCKQUOTE>
Within the definition of a class template or within the definition of
a member of a class template, the keyword <TT>typename</TT> is not
required when referring to the unqualified name of a previously
declared member of the class template that declares a type.
<DEL>The keyword <TT>typename</TT> shall always be specified when the
member is referred to using a qualified name, even if the qualifier is
simply the class template name.</DEL> [Example:

<PRE>
template&lt;class T&gt; struct A {
    typedef int B;
    B b;                      // ok, no typename required
<DEL>    A::B b;                   //  ill-formed: typename required before  A::B
    void f(A&lt;T&gt;::B);          //  ill-formed: typename required before  A&lt;T&gt;::B
    typename A::B g();        //  OK</DEL>
};
</PRE>

<DEL>The keyword typename is required whether the qualified name is A or
A&lt;T&gt; because A or A&lt;T&gt; are synonyms within a class template with
the parameter list &lt;T&gt;. </DEL>]
</BLOCKQUOTE>

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