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<p class="MsoNormal"><span lang="EN-US">Sorry, please ignore this thread. It seems that the mail client resend my previous draft automatically.</span><span lang="EN-US" style="font-size:12.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="border:none;padding:0cm"><b>发件人<span lang="EN-US">: </span>
</b><span lang="EN-US"><a href="mailto:Just_Fancy@live.com">Weitian Leung</a><br>
</span><b>发送时间<span lang="EN-US">: </span></b><span lang="EN-US">2023</span>年<span lang="EN-US">5</span>月<span lang="EN-US">19</span>日<span lang="EN-US"> 20:15<br>
</span><b>收件人<span lang="EN-US">: </span></b><span lang="EN-US"><a href="mailto:pyqt@riverbankcomputing.com">pyqt@riverbankcomputing.com</a><br>
</span><b>主题<span lang="EN-US">: </span></b><span lang="EN-US">ConvertToSubClassCode for IDispatch</span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> I have a IDispatch related sdk header, say it contains two IDispatch interfaces:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">```<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">interface _Foo : public IDispatch {</span>…<span lang="EN-US">};<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">typedef interface Foo Foo; // No definition at all<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">```<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">`Foo` can be QueryInterface from `_Foo` in C++ (or just do a cast), and for this case I asume they are just the same class.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">As the sdk internal only uses the Foo interface, such as:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">```<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">interface Bar : public IDispatch<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">{<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> bool open(</span>…<span lang="EN-US">, Foo** out);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> void dosomething(Foo* f);<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">};<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">```<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">So I use ConvertToSubClassCode to resolve the buggy sdk:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">```<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> class Foo /Abstract,NoDefaultCtors/<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> {<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> %ConvertToSubClassCode<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> sipType = sipType__Foo;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> %End<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> };<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">```<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">It works for `open`, but not for `</span><span lang="EN-US">dosomething` due to ConvertToSubClassCode make `open` returns a `_Foo`, they have no inherits from python</span>’<span lang="EN-US">s
view.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">I can</span><span style="font-size:12.0pt;font-family:SimSun">’ｔ<span lang="EN-US"> change the C++ sdk as it out of my control</span>．<span lang="EN-US"><o:p></o:p></span></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">So is there any chance to make SIP works for such case?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">Thanks.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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