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    CWG Issue 1489</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="1489"></A><H4>1489.
  
Is value-initialization of an array constant initialization?
</H4>
<B>Section: </B>6.10.3.2&#160; [<A href="https://wg21.link/basic.start.static">basic.start.static</A>]
 &#160;&#160;&#160;

 <B>Status: </B>CD3
 &#160;&#160;&#160;

 <B>Submitter: </B>Steve Adamczyk
 &#160;&#160;&#160;

 <B>Date: </B>2012-03-29<BR>


<P>[Moved to DR at the April, 2013 meeting.]</P>

<P>According to 6.10.3.2 [<A href="https://wg21.link/basic.start.static#2">basic.start.static</A>] paragraph 2,</P>

<BLOCKQUOTE>

<P>
<I>Constant initialization</I> is performed:</P>

<UL>
<LI><P>...</P></LI>

<LI>

<P>if an object with static or thread storage duration is not initialized
by a constructor call and if every full-expression that appears in its
initializer is a constant expression.
</P>
</LI>

</UL>

</BLOCKQUOTE>

<P>Presumably this would include a value-initialization (i.e., with no
expressions) such as</P>

<PRE>
  int a[1000]{};
</PRE>

<P>However, we have recently clarified the degenerate cases of other
similar rules referencing &#8220;every,&#8221; so it wouldn't hurt to
be more explicit here.</P>

<P><B>Proposed resolution (October, 2012):</B></P>

<P>Change 6.10.3.2 [<A href="https://wg21.link/basic.start.static#2">basic.start.static</A>] paragraph 2 as follows:</P>

<BLOCKQUOTE>

<P>Constant initialization is performed:</P>

<UL>
<LI><P>...</P></LI>

<LI><P>if an object with static or thread storage duration is not
initialized by a constructor call and if <INS>either the object is
value-initialized or</INS> every full-expression that appears in its
initializer is a constant expression.</P></LI>

</UL>

</BLOCKQUOTE>

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