Ironruby core - Mar 2009 - Casting Objects (COM Interop) addendum

As a follow up to my last message, I wrote a small util method, as follows:
public static class Util
{
  public static T Cast<T>(object o)
  {
    return (T)o;
  }
}

And then try to call it from ruby:

x = Util.method(:cast).of(ICanDoStuff).call(mycomobject)

However, the Util.method(:cast).of(ICanDoStuff) fails with this error:

c:\NB\DLR\18015\Languages\Ruby\Src\IronRuby.Libraries\Protocols.cs:405:in
`ToType'': invalid value for Class: ProxyLi
b::ICanDoStuff (ArgumentError)
        from
c:\NB\DLR\18015\Languages\Ruby\Src\IronRuby.Libraries\Protocols.cs:386:in
`ToTypes''
        from
c:\NB\DLR\18015\Languages\Ruby\Src\IronRuby.Libraries\Builtins\MethodOps.cs:75:in
`BindGenericParameters''
        from :0:in `of''
        from :0

Util.method(:cast).of(String) works fine however - is this because I''m
trying to pass in a .NET interface (which lives in an auto-generated interop
dll built by tlbimp) rather than a class?

Any help is much appreciated
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COM Interop is not supported in IronRuby. COM objects are not easily
reflectable. It *can* be supported. See
http://blogs.msdn.com/shrib/archive/2008/07/30/idispatch-support-on-in-ironpython-beta-4.aspx
for how IronPython does it. However, IronRuby has not done the equivalent work
yet. We will get to it at some point, but as noted in
http://www.ironruby.net/About/Roadmap, its low priority for now as there are
more important scenarios we need to nail first.

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Orion Edwards
Sent: Thursday, March 26, 2009 3:22 PM
To: ironruby-core at rubyforge.org
Subject: [Ironruby-core] Casting Objects (COM Interop) addendum

As a follow up to my last message, I wrote a small util method, as follows:

public static class Util
{
  public static T Cast<T>(object o)
  {
    return (T)o;
  }
}

And then try to call it from ruby:

x = Util.method(:cast).of(ICanDoStuff).call(mycomobject)

However, the Util.method(:cast).of(ICanDoStuff) fails with this error:

c:\NB\DLR\18015\Languages\Ruby\Src\IronRuby.Libraries\Protocols.cs:405:in
`ToType'': invalid value for Class: ProxyLi
b::ICanDoStuff (ArgumentError)
        from
c:\NB\DLR\18015\Languages\Ruby\Src\IronRuby.Libraries\Protocols.cs:386:in
`ToTypes''
        from
c:\NB\DLR\18015\Languages\Ruby\Src\IronRuby.Libraries\Builtins\MethodOps.cs:75:in
`BindGenericParameters''
        from :0:in `of''
        from :0

Util.method(:cast).of(String) works fine however - is this because I''m
trying to pass in a .NET interface (which lives in an auto-generated interop dll
built by tlbimp) rather than a class?

Any help is much appreciated
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