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    CWG Issue 2643</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="2643"></A><H4>2643.
  
Completing a pointer to array of unknown bound
</H4>
<B>Section: </B>6.9.1&#160; [<A href="https://wg21.link/basic.types.general">basic.types.general</A>]
 &#160;&#160;&#160;

 <B>Status: </B>C++23
 &#160;&#160;&#160;

 <B>Submitter: </B>US
 &#160;&#160;&#160;

 <B>Date: </B>2022-11-03<BR><BR>


<A href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2720r0.pdf#US10-039">P2720R0 comment
  US&#160;10-039<BR></A>

<P>[Accepted as a DR at the November, 2022 meeting.]</P>

<P>Subclause 6.9.1 [<A href="https://wg21.link/basic.types.general#6">basic.types.general</A>] paragraph 6 specifies:</P>

<BLOCKQUOTE>

... The type of a pointer to array of unknown bound, or of a type defined
by a <TT>typedef</TT> declaration to be an array of unknown bound,
cannot be completed.

</BLOCKQUOTE>

<P>This is misleading; such a type is already complete.</P>

<P><B>Proposed resolution:</B></P>

<P>Change in 6.9.1 [<A href="https://wg21.link/basic.types.general#6">basic.types.general</A>] paragraph 6 as follows:</P>

<BLOCKQUOTE>

... <INS>[ Note:</INS> The type of a pointer <INS>or reference</INS>
to array of unknown bound <INS>permanently points to or refers to an incomplete
type.  An array of unknown bound</INS> <DEL>, or of a type
defined</DEL> <INS>named</INS> by a <TT>typedef</TT>
declaration <DEL>to be an array of unknown bound,</DEL>
<INS>permanently refers to an incomplete type.  In either case, the
array type</INS> cannot be completed. <INS>-- end note ]</INS>

</BLOCKQUOTE>

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