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    CWG Issue 1062</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="1062"></A><H4>1062.
  
Syntax of <I>attribute-specifier</I>s in lambdas
</H4>
<B>Section: </B>7.5.6&#160; [<A href="https://wg21.link/expr.prim.lambda">expr.prim.lambda</A>]
 &#160;&#160;&#160;

 <B>Status: </B>C++11
 &#160;&#160;&#160;

 <B>Submitter: </B>Peter Sommerlad
 &#160;&#160;&#160;

 <B>Date: </B>2010-03-23<BR><BR>


<P>[Voted into the WP at the November, 2010 meeting.]</P>

<A href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3296.html#CH4">N3092 comment
  CH&#160;4<BR></A>



<P>The adoption of paper N3067 at the March, 2010 meeting moved the
position of the optional <I>attribute-specifier</I> in a function
declarator from immediately following the
<I>parameter-declaration-clause</I> to after the
<I>exception-specification</I>.  However, the grammar in
7.5.6 [<A href="https://wg21.link/expr.prim.lambda#1">expr.prim.lambda</A>] paragraph 1 and the verbal description
in paragraph 5 still have the <I>attribute-specifier</I> in a
<I>lambda-declarator</I> at its old position.  These should be
updated to reflect the new function declarator syntax.</P>

<P><B>Proposed resolution (August, 2010):</B></P>

<OL>
<LI><P>Change the grammar in 7.5.6 [<A href="https://wg21.link/expr.prim.lambda#1">expr.prim.lambda</A>] paragraph 1
as follows:</P></LI>

<UL>
<I>lambda-declarator:</I><BR>
<UL>
<TT>(</TT> <I>parameter-declaration-clause</I> <TT>)</TT> <I><DEL>attribute-specifier<SUB>opt</SUB></DEL></I> <TT>mutable</TT><I><SUB>opt</SUB></I><BR>
<UL><I>exception-specification<SUB>opt</SUB> <INS>attribute-specifier<SUB>opt</SUB></INS> trailing-return-type<SUB>opt</SUB></I></UL>
</UL>
</UL>

<LI><P>Change 7.5.6 [<A href="https://wg21.link/expr.prim.lambda#5">expr.prim.lambda</A>] paragraph 5 as follows:</P></LI>

<BLOCKQUOTE>

...<DEL>Any <I>attribute-specifier</I>s appearing immediately after the
<I>lambda-expression</I>'s
<I>parameter-declaration-clause</I> appertain</DEL> <INS>An
<I>attribute-specifier</I> in a <I>lambda-declarator</I>
appertains</INS> to the type of the corresponding function
call operator...

</BLOCKQUOTE>

</OL>

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