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<div>About documentation, the bottom of <a href="http://ironpython.net/documentation/dotnet/">
http://ironpython.net/documentation/dotnet/</a> has this placeholder :(</div>
<div> </div>
<div> Appendix - Rules for Type parameter inference while invoking generic methods<br>
<font style="BACKGROUND-COLOR: #ffff00">TODO</font><br>
</div>
<div> </div>
<div>Jim, Dino had added tests for IronPython, and you should be able to leverage those for IronRuby</div>
<div> </div>
<div><a href="http://ironruby.codeplex.com/WorkItem/View.aspx?WorkItemId=3395">http://ironruby.codeplex.com/WorkItem/View.aspx?WorkItemId=3395</a> also tracks the issues with generic inference.</div>
<div> </div>
<div style="FONT-FAMILY: Times New Roman; COLOR: #000000; FONT-SIZE: 16px">
<hr tabindex="-1">
<div style="DIRECTION: ltr" id="divRpF885513"><font color="#000000" size="2" face="Tahoma"><b>From:</b> ironruby-core-bounces@rubyforge.org [ironruby-core-bounces@rubyforge.org] on behalf of Jim Deville [jdeville@microsoft.com]<br>
<b>Sent:</b> Friday, February 12, 2010 9:06 AM<br>
<b>To:</b> ironruby-core@rubyforge.org<br>
<b>Subject:</b> Re: [Ironruby-core] Calling a C# method with a byref parameter<br>
</font><br>
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<div></div>
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<div class="WordSection1">
<p class="MsoNormal"><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Generic type inference should work like it does in C#. I’ll get some more tests in there and get Jimmy to update the docs.</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"></span> </p>
<p class="MsoNormal"><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">JD</span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"></span> </p>
<p class="MsoNormal"><b><span style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt">From:</span></b><span style="FONT-FAMILY: 'Tahoma','sans-serif'; FONT-SIZE: 10pt"> ironruby-core-bounces@rubyforge.org [mailto:ironruby-core-bounces@rubyforge.org]
<b>On Behalf Of </b>Ryan Riley<br>
<b>Sent:</b> Thursday, February 11, 2010 9:56 AM<br>
<b>To:</b> ironruby-core@rubyforge.org<br>
<b>Subject:</b> Re: [Ironruby-core] Calling a C# method with a byref parameter</span></p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">On what types will IR be able to infer the types? Is that documented on the site and I just didn't see it?</p>
<div>
<p style="MARGIN-BOTTOM: 12pt" class="MsoNormal"><br clear="all">
Ryan Riley<br>
<br>
</p>
<div>
<p class="MsoNormal">On Thu, Feb 11, 2010 at 9:55 AM, Jim Deville <<a href="mailto:jdeville@microsoft.com" target="_blank">jdeville@microsoft.com</a>> wrote:</p>
<div>
<div>
<p class="MsoNormal"><span style="COLOR: #1f497d; FONT-SIZE: 11pt">That call actually should (usually) be able to infer the type. Please file a bug on codeplex that Generic Type inference isn’t working with ByRef types.</span></p>
<p class="MsoNormal"><span style="COLOR: #1f497d; FONT-SIZE: 11pt"></span> </p>
<p class="MsoNormal"><span style="COLOR: #1f497d; FONT-SIZE: 11pt">JD</span></p>
<p class="MsoNormal"><span style="COLOR: #1f497d; FONT-SIZE: 11pt"></span> </p>
<p class="MsoNormal"><b><span style="FONT-SIZE: 10pt">From:</span></b><span style="FONT-SIZE: 10pt">
<a href="mailto:ironruby-core-bounces@rubyforge.org" target="_blank">ironruby-core-bounces@rubyforge.org</a> [mailto:<a href="mailto:ironruby-core-bounces@rubyforge.org" target="_blank">ironruby-core-bounces@rubyforge.org</a>]
<b>On Behalf Of </b>Shay Friedman<br>
<b>Sent:</b> Thursday, February 11, 2010 6:53 AM<br>
<b>To:</b> <a href="mailto:ironruby-core@rubyforge.org" target="_blank">ironruby-core@rubyforge.org</a><br>
<b>Subject:</b> Re: [Ironruby-core] Calling a C# method with a byref parameter</span></p>
<div>
<div>
<p class="MsoNormal"> </p>
<div>
<p class="MsoNormal">You should call generic methods a bit differently. </p>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">The next code works:</p>
<div>
<p class="MsoNormal">ret_val = c.method(:do_something_else).of(String).call(str)</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Shay.</p>
</div>
<div>
<p style="MARGIN-BOTTOM: 12pt" class="MsoNormal">--------------------------------------------------------<br>
Shay Friedman | .NET Technologies Expert | Author of IronRuby Unleashed | Sela Technology Center<br>
Blog: <a href="http://IronShay.com" target="_blank">http://IronShay.com</a> | Twitter:
<a href="http://twitter.com/ironshay" target="_blank">http://twitter.com/ironshay</a>
</p>
<div>
<p class="MsoNormal">On Thu, Feb 11, 2010 at 4:44 PM, Michael Erasmus <<a href="mailto:michaelerasmus@gmail.com" target="_blank">michaelerasmus@gmail.com</a>> wrote:</p>
<p class="MsoNormal">Thanks Shay.</p>
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<p class="MsoNormal"> </p>
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<div>
<p class="MsoNormal">OK your code works. But my trouble seems to come in with the Generic method. </p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">When I do:</p>
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<p class="MsoNormal"> </p>
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<div>
<div>
<div>
<div>
<p class="MsoNormal">public class Class1</p>
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<div>
<p class="MsoNormal"> {</p>
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<div>
<p class="MsoNormal"> public string DoSomething(ref string test)</p>
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<div>
<p class="MsoNormal"> {</p>
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<div>
<p class="MsoNormal"> test = test + "tamtamtam";</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal"> return "return value";</p>
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<div>
<p class="MsoNormal"> }</p>
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<div>
<p class="MsoNormal"> </p>
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<div>
<p class="MsoNormal"> public string DoSomethingElse<T>(ref T test)</p>
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<div>
<p class="MsoNormal"> {</p>
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<p class="MsoNormal"> return test.ToString(); </p>
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<p class="MsoNormal"> }</p>
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<div>
<p class="MsoNormal"> }</p>
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<div>
<p class="MsoNormal"> </p>
</div>
<p class="MsoNormal">and then call it from IR:</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<div>
<div>
<p class="MsoNormal">>>> c = TestClass::Class1.new</p>
</div>
<div>
<p class="MsoNormal">=> TestClass.Class1</p>
</div>
<div>
<p class="MsoNormal">>>> c.do_something("Bla")</p>
</div>
<div>
<p class="MsoNormal">=> ['return value', 'Blatamtamtam']</p>
</div>
<div>
<p class="MsoNormal">>>> c.do_something_else("Bla")</p>
</div>
<div>
<div>
<p class="MsoNormal">Microsoft.Scripting.Core:0:in `Bind': Expression of type 'IronRuby.Builtins.Muta</p>
</div>
<div>
<p class="MsoNormal">bleString&' cannot be used for parameter of type 'IronRuby.Builtins.MutableStrin</p>
</div>
</div>
<div>
<p class="MsoNormal">g' of method 'System.String DoSomethingElse[MutableString](IronRuby.Builtins.Mut</p>
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<div>
<p class="MsoNormal">ableString ByRef)' (ArgumentError)</p>
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<div>
<div>
<p class="MsoNormal"> from Microsoft.Scripting.Core:0:in `BindCore'</p>
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<div>
<p class="MsoNormal"> from :0</p>
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<p class="MsoNormal"> </p>
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<p class="MsoNormal"> </p>
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<p class="MsoNormal"> </p>
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<p class="MsoNormal"> </p>
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<div>
<p class="MsoNormal">On Thu, Feb 11, 2010 at 4:12 PM, Shay Friedman <<a href="mailto:shay.friedman@gmail.com" target="_blank">shay.friedman@gmail.com</a>> wrote:</p>
<div>
<div>
<p class="MsoNormal">It returns another return value with the new ref value.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">For example, if you have the next c# class:</p>
</div>
<div>
<div>
<p class="MsoNormal">public class Class1</p>
</div>
<div>
<p class="MsoNormal">{</p>
</div>
<div>
<p class="MsoNormal"> public string DoSomething(ref string test)</p>
</div>
<div>
<p class="MsoNormal"> {</p>
</div>
<div>
<p class="MsoNormal"> test = test + "tamtamtam";</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal"> return "return value";</p>
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<div>
<p class="MsoNormal"> }</p>
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<div>
<p class="MsoNormal">}</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">This is the IronRuby code you can write to use it:</p>
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<div>
<div>
<p class="MsoNormal">>>> require 'c:\dev\TestApps\TestClass\TestClass\bin\Debug\TestClass.dll'</p>
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<div>
<p class="MsoNormal">=> true</p>
</div>
<div>
<p class="MsoNormal">>>> c = Class1.new</p>
</div>
<div>
<p class="MsoNormal">=> TestClass.Class1</p>
</div>
<div>
<p class="MsoNormal">>>> str = "hello"</p>
</div>
<div>
<p class="MsoNormal">=> "hello"</p>
</div>
<div>
<p class="MsoNormal">>>> result = c.do_something(str)</p>
</div>
<div>
<p class="MsoNormal">=> ['return value', 'hellotamtamtam']</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Pay attention that the result variable is an array that contains the method return value as the first item and the ref value as the second parameter.</p>
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<div>
<p class="MsoNormal"> </p>
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<div>
<p class="MsoNormal">Shay.</p>
</div>
</div>
</div>
<p style="MARGIN-BOTTOM: 12pt" class="MsoNormal">--------------------------------------------------------<br>
Shay Friedman | .NET Technologies Expert | Author of IronRuby Unleashed | Sela Technology Center<br>
Blog: <a href="http://IronShay.com" target="_blank">http://IronShay.com</a> | Twitter:
<a href="http://twitter.com/ironshay" target="_blank">http://twitter.com/ironshay</a>
</p>
<div>
<div>
<div>
<p class="MsoNormal">On Thu, Feb 11, 2010 at 3:44 PM, Michael Erasmus <<a href="mailto:michaelerasmus@gmail.com" target="_blank">michaelerasmus@gmail.com</a>> wrote:</p>
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<blockquote style="BORDER-BOTTOM: medium none; BORDER-LEFT: #cccccc 1pt solid; PADDING-BOTTOM: 0in; MARGIN: 5pt 0in 5pt 4.8pt; PADDING-LEFT: 6pt; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in">
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<p class="MsoNormal">Hi Everyone,</p>
<div>
<p class="MsoNormal"> </p>
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<div>
<p class="MsoNormal">I'm trying to write a IronRuby script that interops with a a .NET assembly written in C#. </p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">It has a class that derives from a base class in the .NET assembly. One of the base class protected methods looks like this:</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<div>
<p class="MsoNormal">protected void OnNotifyPropertyChanged<T>(string name, ref T localmember, T value)</p>
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<div>
<p class="MsoNormal"> {</p>
</div>
<div>
<p class="MsoNormal"> ......</p>
</div>
<div>
<p class="MsoNormal"> }</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">I can't for the life of me figure out how to call this method from IR in my derived class.</p>
</div>
<div>
<p class="MsoNormal">The documentation mentions that you can call <b>out </b>parameters without using them as arguments, but I can't seem to find anything about
<b>ref </b>params.</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">If I just try calling the method like this:</p>
</div>
<div>
<p class="MsoNormal"> </p>
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<div>
<p class="MsoNormal">OnNotifyPropertyChanged(property_name, value, value)</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">I get this error:</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<div>
<p class="MsoNormal"><i>Microsoft.Scripting.Core:0:in `Bind': Expression of type 'IronRuby.Builtins.Muta</i></p>
</div>
<div>
<p class="MsoNormal"><i>bleString&' cannot be used for parameter of type 'IronRuby.Builtins.MutableStrin</i></p>
</div>
<div>
<p class="MsoNormal"><i>g' of method 'Void #base#OnNotifyPropertyChanged[MutableString](System.String, I</i></p>
</div>
<div>
<p class="MsoNormal"><i>ronRuby.Builtins.MutableString ByRef, IronRuby.Builtins.MutableString)' (Argumen</i></p>
</div>
<div>
<p class="MsoNormal"><i>tError)</i></p>
</div>
<div>
<p class="MsoNormal"><i> from Microsoft.Scripting.Core:0:in `BindCore'</i></p>
</div>
<div>
<p class="MsoNormal"><i> from ./dynamic_event_item.rb:22:in `method_missing'</i></p>
</div>
<div>
<p class="MsoNormal"><i> from :0</i></p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Am I missing something?</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Thanks</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">Michael Erasmus</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
</div>
</div>
<p class="MsoNormal"> </p>
</div>
</div>
<p style="MARGIN-BOTTOM: 12pt" class="MsoNormal">_______________________________________________<br>
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</blockquote>
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<p class="MsoNormal"> </p>
</div>
<p style="MARGIN-BOTTOM: 12pt" class="MsoNormal"><br>
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<p class="MsoNormal"> </p>
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