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    CWG Issue 2122</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="2122"></A><H4>2122.
  
Glvalues of <TT>void</TT> type
</H4>
<B>Section: </B>7.2.1&#160; [<A href="https://wg21.link/basic.lval">basic.lval</A>]
 &#160;&#160;&#160;

 <B>Status: </B>CD4
 &#160;&#160;&#160;

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

 <B>Date: </B>2015-05-05<BR>


<P>[Adopted at the February, 2016 meeting.]</P>

<P>According to 7.2.1 [<A href="https://wg21.link/basic.lval#4">basic.lval</A>] paragraph 4,</P>

<BLOCKQUOTE>

Unless otherwise indicated (7.6.1.3 [<A href="https://wg21.link/expr.call">expr.call</A>]),
prvalues shall always have complete types or
the <TT>void</TT> type; in addition to these types, glvalues
can also have incomplete types.

</BLOCKQUOTE>

<P>This wording inadvertently implies that glvalues can have
type <TT>void</TT>, which is not correct.</P>

<P><B>Proposed resolution (January, 2016):</B></P>

<P>Change 7.2.1 [<A href="https://wg21.link/basic.lval#4">basic.lval</A>] paragraph 4 as follows:</P>

<BLOCKQUOTE>

Unless otherwise indicated (7.6.1.3 [<A href="https://wg21.link/expr.call">expr.call</A>]),
<DEL>prvalues</DEL> <INS>a prvalue</INS> shall always have
complete <DEL>types</DEL> <INS>type</INS> or
the <TT>void</TT> type<DEL>; in addition to these types, glvalues
can also have incomplete types</DEL>. <INS>A glvalue shall not
have type <I>cv</I> <TT>void</TT>.</INS> [<I>Note:</I> <DEL>class</DEL>
<INS>A glvalue may have complete or incomplete
non-<TT>void</TT> type.  Class</INS> and array prvalues can
have cv-qualified types; other prvalues always have
cv-unqualified types. See
Clause 7 [<A href="https://wg21.link/expr">expr</A>]. &#8212;<I>end note</I>]

</BLOCKQUOTE>

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