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    CWG Issue 2262</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="2262"></A><H4>2262.
  
Attributes for <I>asm-definition</I>
</H4>
<B>Section: </B>9.11&#160; [<A href="https://wg21.link/dcl.asm">dcl.asm</A>]
 &#160;&#160;&#160;

 <B>Status: </B>C++17
 &#160;&#160;&#160;

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

 <B>Date: </B>2016-05-04<BR>


<P>[Adopted at the February/March, 2017 meeting.]</P>



<P>There does not seem to be a good reason not to permit attributes on
an <TT>asm</TT> declaration. This would be handy for things like:</P>

<PRE>
  [[vendor::asm_syntax("intel")]] asm(...);
</PRE>

<P>
<B>Notes from the December, 2016 teleconference:</B>
</P>

<P>The omission seems to have been an oversight that should be corrected.</P>

<P><B>Proposed resolution (January, 2017):</B></P>

<P>Change 9.11 [<A href="https://wg21.link/dcl.asm#1">dcl.asm</A>] paragraph 1 as follows:</P>

<BLOCKQUOTE>

<P>An <TT>asm</TT> declaration has the form</P>

<UL>
<I>asm-definition:</I>
<UL>
<INS><I>attribute-specifier-seq<SUB>opt</SUB></I></INS> <TT>asm (</TT> <I>string-literal</I> <TT>) ;</TT>
</UL>
</UL>

<P>The <TT>asm</TT> declaration is conditionally-supported; its meaning is
implementation-defined. <INS>The optional <I>attribute-specifier-seq</I> in
an <I>asm-definition</I> appertains to the <TT>asm</TT> declaration.</INS>
[<I>Note:</I> Typically it is used to pass information through the
implementation to an assembler. &#8212;<I>end note</I>]</P>

</BLOCKQUOTE>

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