From: Gabe Boyer <gboyer@...>
Date: 2006-08-04T01:48:55+09:00
Subject: Re: Creating Classes at runtime

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On 8/3/06, Gabe Boyer <gboyer@gmail.com> wrote:
>
> On 8/3/06, David Stokar <stodavid@student.ethz.ch> wrote:
> >
> > Hi everybody,
> > this is my first post and allready a nifty question ;-)
> >
> > What I want:
> > Create a NAMED class at runtime. Adding functions is clear.
> >
> >
> > E.g. somthing like that: (ClassGenerator is an existing module)
> > module ClassGenerator
> >   def self.generate_new_class ( Parent_Class_Name, Name )
> >   def self.add_method( source )
> > end
> >
> > somewhere else:
> >
> > ClassGenerator::generate_new_class( Fixnum, MyInt );
> > ClassGenerator:: MyInt.add_method( %{ def special_one
> >                        return 2
> >                    }%
> >                  )
> >
> > Thanks,
> > David Stokar
> >
> > --
> > Posted via http://www.ruby-forum.com/ .
> >
> >
>
> Something like the following should accomplish what you want:
>
> module ClassGenerator
>   def self.generate_new_class(name, parent = Object)
>     const_set(name, Class.new(parent))
>   end
> end
>
> - Gabe
>


Sorry David, I should have added a usage example. 'name' should be a symbol:

ClassGenerator.generate_new_class(:MyInt, Fixnum)

- Gabe

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