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    CWG Issue 1681</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="1681"></A><H4>1681.
  
<I>init-capture</I>s and nested lambdas
</H4>
<B>Section: </B>7.5.6.3&#160; [<A href="https://wg21.link/expr.prim.lambda.capture">expr.prim.lambda.capture</A>]
 &#160;&#160;&#160;

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

 <B>Submitter: </B>Richard Smith
 &#160;&#160;&#160;

 <B>Date: </B>2013-05-14<BR>


<P>[Applied to WP at the February, 2014 meeting.]</P>



<P>According to 7.5.6 [<A href="https://wg21.link/expr.prim.lambda#10">expr.prim.lambda</A>] paragraph 10,</P>

<BLOCKQUOTE>

The <I>identifier</I> in a <I>simple-capture</I> is looked up using the
usual rules for unqualified name lookup (6.5.3 [<A href="https://wg21.link/basic.lookup.unqual">basic.lookup.unqual</A>]); each
such lookup shall find a variable with automatic storage duration declared
in the reaching scope of the local lambda expression.

</BLOCKQUOTE>

<P>This does not permit a nested lambda to capture the non-static
data member of the closure type introduced by an <I>init-capture</I>.
A similar restriction applies to implicit capture in paragraph 12.</P>

<P>Presumably such captures should be allowed, capturing the non-static
data member directly rather than the <TT>this</TT> pointer from the
enclosing lambda's <TT>operator()</TT>.</P>

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

<P>This issue is resolved by the resolution of
<A HREF="1760.html">issue 1760</A>.</P>

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