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    CWG Issue 76</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="76"></A><H4>76.
  
Are const volatile variables considered "constant expressions"?
</H4>
<B>Section: </B>9.2.9.2&#160; [<A href="https://wg21.link/dcl.type.cv">dcl.type.cv</A>]
 &#160;&#160;&#160;

 <B>Status: </B>TC1
 &#160;&#160;&#160;

 <B>Submitter: </B>Judy Ward
 &#160;&#160;&#160;

 <B>Date: </B>15 Dec 1998<BR>



<P>The following code does not compile with the EDG compiler:</P>
<PRE>
    volatile const int a = 5;
    int b[a];
</PRE>
The standard,
9.2.9.2 [<A href="https://wg21.link/dcl.type.cv">dcl.type.cv</A>]
, says:
<BLOCKQUOTE>A variable of const-qualified integral or enumeration type
initialized by an integral constant expression can be used in integral
constant expressions.</BLOCKQUOTE>
This doesn't say it can't be const volatile-qualified, although I think
that was what was intended.

<P>
<B>Proposed Resolution (10/99):</B>
Change the referenced text in paragraph 2 of
9.2.9.2 [<A href="https://wg21.link/dcl.type.cv">dcl.type.cv</A>]
 to read:</P>

<UL>A variable of <INS>non-volatile</INS> const-qualified ...</UL>
<BR><BR>
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