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    CWG Issue 1126</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="1126"></A><H4>1126.
  
<TT>constexpr</TT> functions in <TT>const</TT> initializers
</H4>
<B>Section: </B>7.7&#160; [<A href="https://wg21.link/expr.const">expr.const</A>]
 &#160;&#160;&#160;

 <B>Status: </B>C++11
 &#160;&#160;&#160;

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

 <B>Date: </B>2010-08-02<BR><BR>


<P>[Voted into the WP at the November, 2010 meeting.]</P>

<A href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3296.html#GB25">N3092 comment
  GB&#160;25<BR></A>

<P>It does not appear to be clearly enough stated that the example</P>

<PRE>
    constexpr int f() { return 42 + 84; }
    const int sz = f();
    int a[sz];
</PRE>

<P>is equivalent to</P>

<PRE>
    const int sz = 42 + 84;
    int a[sz];
</PRE>

<P><B>Proposed resolution (August, 2010):</B></P>

<P>Change 7.7 [<A href="https://wg21.link/expr.const#1">expr.const</A>] paragraph 1 as follows:</P>

<BLOCKQUOTE>

Certain contexts require expressions that satisfy additional
requirements as detailed in this sub-clause<INS>; other
contexts have different semantics depending on whether or
not an expression satisfies these
requirements</INS>. <DEL>Such expressions</DEL>
<INS>Expressions that satisfy these requirements</INS> are
called <I>constant expressions</I>. [<I>Note:</I>
<DEL>Those</DEL> <INS>Constant</INS> expressions can be
evaluated during translation. &#8212;<I>end note</I>]

</BLOCKQUOTE>

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