Am Mittwoch, 12. Jan 2005, 05:06:36 +0900 schrieb E S:
> > LçÉettçËäº Bertram Scharpf <lists / bertram-scharpf.de>
> > Aihe: Kernel#eval and class definition
> > 
> > Hi,
> > 
> > I try to understand more deeply what Ruby does.
> > Why here is the first line forbidden, the second allowed?
> > 
> >     def f ; class C ; end ; end
> >     def f ; eval "class C ; end", binding ; end
> > 
> > Thanks for your answers in advance.
> 
> I'm assuming you have something passed to the function that you need
> the binding for? Are you getting an error? You may want to try to 
> establish the binding before the eval call and see if that helps.

That shouldn't make a difference and, as far as I see, it
doesn't.

irb(main):001:0> def f ; class C ; end ; end
SyntaxError: compile error
(irb):1: class definition in method body
def f ; class C ; end ; end
                 ^
        from (irb):1
irb(main):002:0> def f ; eval "class C ; end", binding ; end
=> nil
irb(main):003:0> def f x ; y = x ; eval "class C ; end", binding ; end
=> nil
irb(main):004:0> 

Bertram

-- 
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de