While I can certainly see the elegance of the 'of' suggestion, it can't help but to trip my "code smell" warning, because 'of' implies 'typeof', and it treats the types as method arguments.

I can't help but think that every new programmer, seeing this:
myTexture = content.load( of(Texture2D), "mytexture" )
is going to wrongly infer that it's calling this CLR method
content.Load( typeof(Texture2D), "mytexture" )
The relative lack of such counter-intuitive assumptions is IMHO one of the best things about ruby. I'd really like to see IronRuby keep this up

Perhaps it would be more clear if 'of' was 'T' ?? -  eg:
myTexture = content.load( T(Texture2D), "mytexture" )
But that doesn't really solve the 'types aren't method arguments' problem

How about this:
myTexture = content.load[Texture2D]( "mytexture" )
myTexture = content.load[Texture2D] "mytexture"
Both of these produce a syntax error in MRI, which IMHO is a good thing as it means IronRuby is not breaking any existing functionality.
MRI is never going to have to call generics, and as far as I can tell there won't be any overlaps with existing ruby syntax  (eg Proc#[], etc), so it seems safe.
It also is consistent with the existing syntax for instantiating generic classes.

The deal-breaker I guess would be how hard (or possible) this syntax is to implement with the IronRuby parser, etc.



Tomas Matousek wrote:
I'm thinking of something like:

myTexture = content.load of(Texture2D), "mytexture"

I.e. we would add Kernel#of method that takes a list of classes/modules and returns a special object representing generic parameters that binder would use for selecting the right method.

We are open for more ideas.

Tomas

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Dudu Baião
Sent: Wednesday, November 26, 2008 10:49 AM
To: ironruby-core@rubyforge.org
Subject: Re: [Ironruby-core] IronRuby and XNA. Super and Generics

Thanks John!

I will do that.

Just for curiosity, what will be the syntax to call generic methods? :)


2008/11/26 John Lam (IRONRUBY) <[EMAIL PROTECTED]>:
  
We can't consume generic methods today. It's on the list of things to do though.

You can work around this by defining a concrete method in C# that calls the appropriate generic method and call the concrete method from IronRuby.

Thanks,
-John

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Dudu Baião
Sent: Tuesday, November 25, 2008 6:26 PM
To: ironruby-core@rubyforge.org
Subject: [Ironruby-core] IronRuby and XNA. Super and Generics

Hi guys!

Im playing with XNA trying to run the simplest xna example: To show a
SpriteBatch on screen.

After some tests I found some problems:

1- The "Microsoft::Xna::Framework::Game" expects that we implement
some methods like "Update", "Drawn" etc, and inside the method we have
to call the base class (super) actual method passing some parameters.

If I try to do this:

   def update(game_time)
     super(game_time)
   end

I get this error:

my_game.rb:23:in `update': wrong number or type of arguments for
`update' (ArgumentError)
   from Snippets.scripting:0:in `Update'
   from Microsoft.Xna.Framework.Game:0:in `Run'
   from program.rb:23:in `main'
   from :0

2- XNA uses generic functions to load the game contents. How can I
convert the code above to IronRuby?

// This is a texture we can render.
Texture2D myTexture;

protected override void LoadContent()
{
   myTexture = Content.Load<Texture2D>("mytexture");
}

Can IronRuby consume generics?

Thanks!
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