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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The Reference object is just a holder so that you can pass it
in, and then use it after the call. It has a .Value property that will return
you the updated value (or the original if the value hasn’t changed). So
x.Value should get you the new value.<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>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Segoe UI","sans-serif"'>From:</span></b><span
style='font-size:9.0pt;font-family:"Segoe UI","sans-serif"'>
users-bounces@lists.ironpython.com [mailto:users-bounces@lists.ironpython.com] <b>On
Behalf Of </b>Frank Kampas<br>
<b>Sent:</b> Friday, August 25, 2006 2:17 PM<br>
<b>To:</b> Discussion of IronPython<br>
<b>Subject:</b> Re: [IronPython] c# function that passes arguments by reference<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>Ok, that worked but what I got back is not very useful<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>>>> lpstat = clr.Reference[int](0)<br>
>>> objval = clr.Reference[float](0)<br>
>>> x =
clr.Reference[System.Array[float]](System.Array[float]((0,0,0)))<br>
>>> pi = clr.Reference[System.Array[float]](System.Array[float]((0,0,0)))<br>
>>> sl =
clr.Reference[System.Array[float]](System.Array[float]((0,0,0)))<br>
>>> dj =
clr.Reference[System.Array[float]](System.Array[float]((0,0,0)))<br>
>>> wr.GetResults(lpstat,objval,x,pi,sl,dj)<br>
True<br>
>>> x<br>
<IronPython.Modules.ClrModule+Reference`1[[System.Double[], mscorlib,
Version=2.<br>
0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]] object at
0x0000000000<br>
00002E [Reference(System.Double[])]><br>
>>> lpstat<br>
<IronPython.Modules.ClrModule+Reference`1[[System.Int32, mscorlib, Version=2.0.0<br>
.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]] object at
0x0000000000000<br>
02F [Reference(1)]><br>
>>><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>The approach I found seems to be more useful if it doesn't have
some problem that<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>would show up for bigger arrays.<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>>>> wr.GetResults(0,0,(0,0,0),(0,0,0),(0,0,0),(0,0,0))<br>
(True, 1, 13.0, System.Double[](5.0, 4.0, 0.0), System.Double[](0.0, 0.0,
-3.062<br>
5), System.Double[](0.0, 0.0, 0.0), System.Double[](0.0, 0.0625, 0.375))<o:p></o:p></span></p>
</div>
<blockquote style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>----- Original Message ----- <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>From:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'> <a href="mailto:dinov@exchange.microsoft.com"
title="mailto:dinov@exchange.microsoft.com">Dino Viehland</a> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>To:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'> <a href="mailto:users@lists.ironpython.com"
title="mailto:users@lists.ironpython.com">Discussion of IronPython</a> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>Sent:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'> Friday, August 25, 2006 5:00 PM<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>Subject:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'> Re: [IronPython] c# function that passes arguments by reference<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'><o:p> </o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>You can do:</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>import System</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>import clr</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>clr.Reference[System.Array[int]]( System.Array[int]( (1,2,3) ) )</span><span
style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>This breaks down into the array creation:</span><span
style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>System.Array[int]( (1,2,3) )</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>And then passing that to the new instance of
clr.Reference. </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Segoe UI","sans-serif";
color:black'>From:</span></b><span style='font-size:9.0pt;font-family:"Segoe UI","sans-serif";
color:black'> <a href="mailto:users-bounces@lists.ironpython.com"
title="mailto:users-bounces@lists.ironpython.com">users-bounces@lists.ironpython.com</a>
[mailto:users-bounces@lists.ironpython.com] <b>On Behalf Of </b>Frank Kampas<br>
<b>Sent:</b> Friday, August 25, 2006 1:43 PM<br>
<b>To:</b> Discussion of IronPython<br>
<b>Subject:</b> Re: [IronPython] c# function that passes arguments by reference</span><span
style='color:black'><o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><span style='color:black'> <o:p></o:p></span></p>
<div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>how to I create an array to pass by reference? I assume that
your example is creating an integer with a value of 3 to pass by reference.</span><span
style='color:black'><o:p></o:p></span></p>
</div>
<blockquote style='border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>----- Original Message ----- </span><span style='color:black'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>From:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'> <a href="mailto:dinov@exchange.microsoft.com"
title="mailto:dinov@exchange.microsoft.com">Dino Viehland</a> </span><span
style='color:black'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>To:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'> <a href="mailto:users@lists.ironpython.com"
title="mailto:users@lists.ironpython.com">Discussion of IronPython</a> </span><span
style='color:black'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>Sent:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'> Friday, August 25, 2006 4:06 PM</span><span style='color:black'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>Subject:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'> Re: [IronPython] c# function that passes arguments by reference</span><span
style='color:black'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'> </span><span style='color:black'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>This is the “easy” way to call functions that are passing values
by reference. You should be able to pass non-zero values as well as
non-empty arrays. The only thing that should disallow this is if there
were multiple overloads that resulted in an ambiguous method resolution. </span><span
style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>For these cases there is a generic Reference type defined in the
CLR module. You can use this:</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>import clr</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>x = clr.Reference[int](3)</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>someObj.someFunction(x)</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>print x.Value</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>and Value will be updated after the call.</span><span
style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:9.0pt;font-family:"Segoe UI","sans-serif";
color:black'>From:</span></b><span style='font-size:9.0pt;font-family:"Segoe UI","sans-serif";
color:black'> users-bounces@lists.ironpython.com
[mailto:users-bounces@lists.ironpython.com] <b>On Behalf Of </b>Frank Kampas<br>
<b>Sent:</b> Friday, August 25, 2006 12:58 PM<br>
<b>To:</b> users@lists.ironpython.com<br>
<b>Subject:</b> [IronPython] c# function that passes arguments by reference</span><span
style='color:black'><o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><span style='color:black'> <o:p></o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>If I import a c# function that passes its arguments (integers and
arrays)</span><span style='color:black'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>by reference, the only way I can get it to work is pass zeroes for
the integers and</span><span style='color:black'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>arrays of zero for the arrays. The results for the
variables passed by reference return with the function</span><span
style='color:black'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>return. Is that what is supposed to occur? </span><span
style='color:black'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>_______________________________________________<br>
users mailing list<br>
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title="mailto:users@lists.ironpython.com">users@lists.ironpython.com</a><br>
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title="http://lists.ironpython.com/listinfo.cgi/users-ironpython.com">http://lists.ironpython.com/listinfo.cgi/users-ironpython.com</a></span><span
style='color:black'><o:p></o:p></span></p>
</blockquote>
</div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>_______________________________________________<br>
users mailing list<br>
<a href="mailto:users@lists.ironpython.com">users@lists.ironpython.com</a><br>
<a href="http://lists.ironpython.com/listinfo.cgi/users-ironpython.com">http://lists.ironpython.com/listinfo.cgi/users-ironpython.com</a><o:p></o:p></span></p>
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