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    CWG Issue 2114</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="2114"></A><H4>2114.
  
Missing description of incompatibility from aggregate NSDMIs
</H4>
<B>Section: </B>_N4750_.C.3.5&#160; [<A href="https://wg21.link/diff.cpp11.dcl.decl">diff.cpp11.dcl.decl</A>]
 &#160;&#160;&#160;

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

 <B>Submitter: </B>Ville Voutilainen
 &#160;&#160;&#160;

 <B>Date: </B>2015-04-14<BR>




<P>The following example illustrates an incompatibility between
C++11 and C++14:</P>

<PRE>
  struct S {
    int m = 1;
  };        //<SPAN CLASS="cmnt"> C++11: S is non-aggregate</SPAN>
            //<SPAN CLASS="cmnt"> C++14: S is AGGREGATE</SPAN>
  struct X {
      operator int();
      operator S();
  };

  int main() {
    X a{};
    S b{a};  //<SPAN CLASS="cmnt"> C++11: valid, copy constr S(a.operator S()) is called here</SPAN>
             //<SPAN CLASS="cmnt"> C++14: valid, aggregate initialization { a.operator int() }</SPAN>

    printf("%d\n", b.m);
  }
</PRE>

<P>This should be documented in Annex Clause Annex C [<A href="https://wg21.link/diff">diff</A>].</P>

<P><B>Notes from the May, 2015 meeting:</B></P>

<P>This will be handled editorially; the status has been set to
"review" to check that the editorial change has been made.</P>

<BR><BR>
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