Ironruby core - Nov 2008 - StackOverflowException when accessing object properties

Hello all,

Why does the stack overflow?

class Program
{
    static void Main(string[] args)
    {
        ScriptRuntime runtime = Ruby.CreateRuntime();
        ScriptEngine engine = runtime.GetRubyEngine();

        ScriptScope scope = engine.CreateScope();
        scope.SetVariable("my_var", new TestClass() { Text =
"Hello
world!", Number = 42 });

        ScriptSource source
engine.CreateScriptSourceFromString("my_var.text");
        Console.WriteLine(source.Execute<object>(scope));
    }
}

class TestClass
{
    public string Text;
    public int Number;
}

If I set "my_var" to a string and query it''s Length property,
no
problem. I''m sure I''m missing something?I came up with this
code by
reading a PDF found on the IronRuby site
(http://ironruby.net/@api/deki/files/1/=dlr-spec-hosting.pdf --
redirects to Amazon S3) because I couldn''t find any examples. Maybe I
need to somehow import TestClass'' namespace into the scope?

Thanks a lot, and apologies in advance for formatting problems (can''t
find a preview post option).

benjamin
-- 
Posted via http://www.ruby-forum.com/.

I think this is because you need to reference the IronRuby.Libraries dll.
Strange error I know.

On Sat, Nov 15, 2008 at 7:33 PM, Benjamin Van der veen <lists at
ruby-forum.com
> wrote:
> Hello all,
>
> Why does the stack overflow?
>
> class Program
> {
>    static void Main(string[] args)
>    {
>        ScriptRuntime runtime = Ruby.CreateRuntime();
>        ScriptEngine engine = runtime.GetRubyEngine();
>
>        ScriptScope scope = engine.CreateScope();
>        scope.SetVariable("my_var", new TestClass() { Text =
"Hello
> world!", Number = 42 });
>
>        ScriptSource source >
engine.CreateScriptSourceFromString("my_var.text");
>        Console.WriteLine(source.Execute<object>(scope));
>    }
> }
>
> class TestClass
> {
>    public string Text;
>    public int Number;
> }
>
> If I set "my_var" to a string and query it''s Length
property, no
> problem. I''m sure I''m missing something?I came up with
this code by
> reading a PDF found on the IronRuby site
> (http://ironruby.net/@api/deki/files/1/=dlr-spec-hosting.pdf --
> redirects to Amazon S3) because I couldn''t find any examples.
Maybe I
> need to somehow import TestClass'' namespace into the scope?
>
> Thanks a lot, and apologies in advance for formatting problems
(can''t
> find a preview post option).
>
> benjamin
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
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Hello Andrew,

Andrew Peters wrote:
> I think this is because you need to reference the IronRuby.Libraries 
> dll.
> Strange error I know.
> 
> On Sat, Nov 15, 2008 at 7:33 PM, Benjamin Van der veen 
> <lists at ruby-forum.com
Ah, yes, this fixed the stack overflow error. Strange indeed?thanks for 
the tip! However, it''s still not properly resolving the property 
correctly:

MissingMethodException: undefined method `text'' for 
#<My::Namespace::TestClass:0x000005c>

I tried changing TestClass'' fields to properties so that they would get
compiled as methods:

class TestClass
{
    public string Text { get; set; }
    public int Number { get; set; }
}

but no dice. Also tried capitalizing "Text". Still works with 
String.Length though (whether I reference it as "my_var.length" or 
"my_var.Length". Any ideas?

(Also, as somewhat of a side-note, is there a different syntax for 
accessing field on CLR objects in IronRuby? Is this possible or must 
they be properties?)

Thanks again,
benjamin

-- 
Posted via http://www.ruby-forum.com/.

Isn''t the class internal? (We should improve error reporting related to
visibility)
Try to make it public. Public fields should be accessible in the same way
properties are.

Tomas

-----Original Message-----
From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Benjamin van der Veen
Sent: Saturday, November 15, 2008 2:16 PM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] StackOverflowException when accessing object
properties

Hello Andrew,

Andrew Peters wrote:
> I think this is because you need to reference the IronRuby.Libraries
> dll.
> Strange error I know.
>
> On Sat, Nov 15, 2008 at 7:33 PM, Benjamin Van der veen
> <lists at ruby-forum.com
Ah, yes, this fixed the stack overflow error. Strange indeed?thanks for
the tip! However, it''s still not properly resolving the property
correctly:

MissingMethodException: undefined method `text'' for
#<My::Namespace::TestClass:0x000005c>

I tried changing TestClass'' fields to properties so that they would get
compiled as methods:

class TestClass
{
    public string Text { get; set; }
    public int Number { get; set; }
}

but no dice. Also tried capitalizing "Text". Still works with
String.Length though (whether I reference it as "my_var.length" or
"my_var.Length". Any ideas?

(Also, as somewhat of a side-note, is there a different syntax for
accessing field on CLR objects in IronRuby? Is this possible or must
they be properties?)

Thanks again,
benjamin

--
Posted via http://www.ruby-forum.com/.
_______________________________________________
Ironruby-core mailing list
Ironruby-core at rubyforge.org
http://rubyforge.org/mailman/listinfo/ironruby-core

Tomas Matousek wrote:
> Isn''t the class internal? (We should improve error reporting
related to
> visibility)
> Try to make it public. Public fields should be accessible in the same 
> way properties are.
> 
> Tomas
Yep, that was the problem. Declared it public and it works now.

Thanks,
benjamin
-- 
Posted via http://www.ruby-forum.com/.