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    CWG Issue 2186</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="2186"></A><H4>2186.
  
Unclear point that &#8220;preceding initialization&#8221; must precede
</H4>
<B>Section: </B>7.7&#160; [<A href="https://wg21.link/expr.const">expr.const</A>]
 &#160;&#160;&#160;

 <B>Status: </B>C++20
 &#160;&#160;&#160;

 <B>Submitter: </B>Hubert Tong
 &#160;&#160;&#160;

 <B>Date: </B>2015-10-24<BR>


<P>[ Resolved by P0595R2, adopted in November, 2018. ]</P>

<P>Similar to the concern of <A HREF="2166.html">issue 2166</A>,
the requirement of 7.7 [<A href="https://wg21.link/expr.const#2.7.1">expr.const</A>] bullet 2.7.1 for</P>

<UL>
<LI><P>a non-volatile glvalue of integral or enumeration
type that refers to a complete non-volatile const object
with a preceding initialization, initialized with a constant
expression, or</P></LI>

</UL>

<P>does not specify the point at which the determination of
&#8220;preceding initialization&#8221; is made: is it at the
point at which the reference to the variable appears
lexically, or is it the point at which the outermost
constant evaluation occurs?  There is implementation
divergence on this point.</P>

<P><B>Additional notes (July, 2024)</B></P>

<P>The words in question were removed by P0595R2
(<TT>std::is_constant_evaluated()</TT>), adopted in November,
2018.</P>

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