The .NET method can't accept normal IronRuby objects, because of the new() constraint.
IronRuby objects behind the scenes are all instances of A .NET class called RubyObject - you can see it's code here: https://github.com/IronLanguages/main/blob/master/Languages/Ruby/Ruby/Builtins/RubyObject.cs RubyObject has 2 constructors, both of which require parameters... Your new() constraint says "I can only accept methods with public zero-argument constructors"... RubyObject doesn't satisfy this (and neither do many many other .NET classes), so it simply doesn't work. If you remove the new() constraint, you can pass Ruby objects to the Store method. There is another way to do this also. If you create a blank .NET class with a default constructor, and have your ruby classes derive from it, then IronRuby will create instances of those classes instead of RubyObject. You can then call the Store method and use the .NET class as the T. Remember, C# can't see any of the ruby methods, but it will also allow you to "store" the object. Here's my example code: C#: public static class Demo { public static void Store<T>(T obj) where T : class, new() { Console.WriteLine("Storing {0}", obj); } } public class SimpleObject { public SimpleObject() { } } IronRuby: class X < SimpleObject; end x_instance = X.new Demo.method(:Store).of(SimpleObject).call x_instance # This prints "Storing IronRuby.Classes.SimpleObject$1" If it's ok, can I ask what you're trying to do here? Normal .NET code can't really interact with ruby objects unless it's built to use the C# 4 dynamic keyword, or has special knowledge of the Dynamic Language Runtime API's... If you're just putting ruby objects in a list so that ruby code can retrieve them later that will be fine, but if you're trying to do other things, you may run into problems... ______________________________________________________ Orion Edwards | Technical Leader PHONE +64 7 838 9800 | FAX +64 7 838 9801 | EMAIL orion.edwa...@gallagher.co | WEB www.gallagher.co From: Alexander Ranger <li...@ruby-forum.com> To: ironruby-core@rubyforge.org Date: 18/07/2012 06:23 p.m. Subject: [Ironruby-core] Calling .Net generic method with Ruby object Sent by: ironruby-core-boun...@rubyforge.org Hello. I've got this problem: I'm having a .Net method with generics like this: void Store<T>(T obj) where T : class, new(); And I'm trying to call it from IronRuby project with Ruby object as an argument. comp = Computer.new session.method(:Store).of(Computer).call(comp) #session is another user created .Net object, which has the method Store And when I'm running the project an error pops up "GenericArguments[0], "IronRuby.Builtins.RubyObject", in "Void Store[T](T)" does not satisfy the restriction of the type parameter "T"" I guess that .Net generic just can't accept RubyObject as an argument. But can I somehow bypass that restriction? -- Posted via http://www.ruby-forum.com/. _______________________________________________ Ironruby-core mailing list Ironruby-core@rubyforge.org http://rubyforge.org/mailman/listinfo/ironruby-core
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