From: Daniel Finnie <dan@...>
Date: 2008-05-08T01:03:06+09:00
Subject: Re: Reading from file, create a class with variables

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Hi,

I think that the Doodle Rubygem might be a good fit for this purpose, unless
this is just an exercise to further your Ruby-fu.

To make sure something is a string, you can use the kind_of? or is_a?
methods.  I would use kind_of? in this case (for the differences, check
http://ruby-doc.org/core/classes/Object.html#M000371 ).

Then, you just have to make sure things set with object.name = "ssdfd" are
Strings using define_method:

attr_name = :age
attr_type = Fixnum

klass.class_eval do
  define_method "#{attr_name}=" do |arg|
    self.instance_variable_set("@#{attr_name}", arg) if arg.type_of?
attr_type
  end
end

And something similar for the initialize method.

Dan

On 5/7/08, Claes Rembrandt <kackihamas@hotmail.com> wrote:
>
> Pelle Strul wrote:
> > Hi, I'm trying to load a file with specifications like:
> >
> > title     :Person
> > attribute :name, String
> > attribute :age,  Fixnum
> > constraint :name, 'name != nil'
> > constraint :name, 'name.size > 0'
> > constraint :name, 'name =~ /^[A-Z]/'
> > constraint :age, 'age >= 0'
>
>
> Im also curious about how this could be solved...
> --
> Posted via http://www.ruby-forum.com/.
>
>

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