Hi,

In message "Re: Kernel#eval and class definition"
    on Wed, 12 Jan 2005 18:26:23 +0900, "Robert Klemme" <bob.news / gmx.net> writes:

|>     def f ; class C ; end ; end
|>     def f ; eval "class C ; end", binding ; end
|
|Well eval "..." is just an expression and "eval" evaluates everyhing it
|get's that's syntactically correct.  The ruby code in the string
|expression is not syntactically located in method f.  It's parsed at
|runtime while the line above is completely evaluated at compile time.

Thanks for explanation.  class definition in the method is prohibited
by syntax just to detect errors.  And class definition in eval is
allowed as a back door.  Besides, scope management also is a reason,
but it's an implementation matter.

							matz.