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    CWG Issue 1442</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="1442"></A><H4>1442.
  
Argument-dependent lookup in the range-based <TT>for</TT>
</H4>
<B>Section: </B>8.6.5&#160; [<A href="https://wg21.link/stmt.ranged">stmt.ranged</A>]
 &#160;&#160;&#160;

 <B>Status: </B>CD3
 &#160;&#160;&#160;

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

 <B>Date: </B>2012-01-16<BR>


<P>[Moved to DR at the April, 2013 meeting.]</P>

<P>It is not clear whether the reference to argument-dependent lookup
in 8.6.5 [<A href="https://wg21.link/stmt.ranged#1.3">stmt.ranged</A>] bullet 1.3 should be
&#8220;pure&#8221; argument-dependent lookup (with no unqualified
name lookup component) or the usual lookup that is invoked when
argument-dependent lookup is done, i.e., unqualified lookup, potentially
augmented by the associated namespaces.</P>

<P><B>Proposed resolution (October, 2012):</B></P>

<P>Change 8.6.5 [<A href="https://wg21.link/stmt.ranged#1.3">stmt.ranged</A>] bullet 1.3 as follows:</P>

<UL><LI><P>otherwise, <I>begin-expr</I> and <I>end-expr</I> are
<TT>begin(__range)</TT> and <TT>end(__range)</TT>, respectively, where
<TT>begin</TT> and <TT>end</TT> are looked up <DEL>with
argument-dependent lookup</DEL> <INS>in the associated
namespaces</INS> (6.5.4 [<A href="https://wg21.link/basic.lookup.argdep">basic.lookup.argdep</A>]). <DEL>For the purposes
of this name lookup, namespace <TT>std</TT> is an associated
namespace.</DEL> <INS>[<I>Note:</I> Ordinary unqualified lookup
(6.5.3 [<A href="https://wg21.link/basic.lookup.unqual">basic.lookup.unqual</A>]) is not performed. &#8212;<I>end
note</I>]</INS>
</P></LI></UL>

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