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    CWG Issue 1588</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="1588"></A><H4>1588.
  
Deducing cv-qualified <TT>auto</TT>
</H4>
<B>Section: </B>9.2.9.7&#160; [<A href="https://wg21.link/dcl.spec.auto">dcl.spec.auto</A>]
 &#160;&#160;&#160;

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

 <B>Submitter: </B>Jens Maurer
 &#160;&#160;&#160;

 <B>Date: </B>2012-11-18<BR>




<P>In an example like</P>

<PRE>
  const auto x = 3;
</PRE>

<P>the intent, clearly, is to make <TT>const int</TT> the type of
<TT>x</TT>.  It is not clear, however, that the current wording
accomplishes this.  Because the deduction is based on that of
function calls, and because top-level cv-qualifiers are ignored
in such deduction, it appears that 9.2.9.7 [<A href="https://wg21.link/dcl.spec.auto#6">dcl.spec.auto</A>] paragraph 6,
</P>

<BLOCKQUOTE>

The type deduced for the variable <TT>d</TT> is then the deduced
<TT>A</TT> determined using the rules of template argument deduction
from a function call (13.10.3.2 [<A href="https://wg21.link/temp.deduct.call">temp.deduct.call</A>]), where <TT>P</TT>
is a function template parameter type and the initializer for
<TT>d</TT> is the corresponding argument.

</BLOCKQUOTE>

<P>incorrectly gives <TT>x</TT> the type <TT>int</TT>.</P>

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

<P>This issue is resolved by the wording changes in N3638, adopted
at the April, 2013 (Bristol) meeting.</P>

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