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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">In fact, in C++ it will not initialize the object, unlike e.g. Java.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">As the poster said, it will construct an ArcSDEFilterToSQL in the local scope and then return, with the object the caller wanted to initialize being left uninitialized.
It’s a serious bug if that constructor is ever used.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Traian<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> fdo-users-bounces@lists.osgeo.org [mailto:fdo-users-bounces@lists.osgeo.org]
<b>On Behalf Of </b>Greg Boone<br>
<b>Sent:</b> Monday, February 28, 2011 10:27 AM<br>
<b>To:</b> FDO Users Mail List<br>
<b>Subject:</b> RE: [fdo-users] ArcSDE: Another serious bug (general C++ trap)<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This looks like a good area for refactoring. I agree that having the default constructor call the non-default constructor is not the best approach.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Greg<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> fdo-users-bounces@lists.osgeo.org [mailto:fdo-users-bounces@lists.osgeo.org]
<b>On Behalf Of </b>Oyvind Idland<br>
<b>Sent:</b> Monday, February 28, 2011 7:41 AM<br>
<b>To:</b> FDO Users Mail List<br>
<b>Subject:</b> [fdo-users] ArcSDE: Another serious bug (general C++ trap)<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">In the definition of ArcSDEFilterToSql (in ArcSDEFilterToSQL.h), there are two<br>
constructors:<br>
<br>
ArcSDEFilterToSql() { ArcSDEFilterToSql(NULL, NULL); } // 0-argument constructor to please FdoPtr::operator-><br>
<br>
ArcSDEFilterToSql (ArcSDEConnection *conn, FdoClassDefinition* definition);<br>
<br>
<br>
The first one with no arguments will not work, in fact, it will just allocate another instance of itself and return.<br>
<br>
There is, as far as I know, no way to make a constructor call another constructor in C++. Instead, an init() method<br>
must be implemented.<br>
<br>
I don't know if this constructor has ever been used, I just saw it while refactoring code.. but I am a bit worried if<br>
this has been done several places.<br>
<br>
<br>
-- Oyvind<br>
<br>
<br>
<br>
<o:p></o:p></p>
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