From: Joel VanderWerf <joelvanderwerf@...>
Date: 2013-03-27T03:19:02+09:00
Subject: Re: Need help on Kernel#eval

On 03/25/2013 11:33 PM, Love U Ruby wrote:
>  From the link -> http://www.ruby-doc.org/core-2.0/Binding.html
> 	
> Objects of class Binding encapsulate the execution context at some
> particular place in the code and retain this context for future use. The
> variables, ***methods, value of self, and possibly an iterator block
> that can be accessed in this context are all retained***. Binding
> objects can be created using Kernel#binding, and **are made available to
> the callback of Kernel#set_trace_func**.

Here's an example of getting the iterator block from the binding, but 
there is something puzzling:

def foo; binding; end
bi = foo {|x| p(x+1)}

bi.eval "yield 2"       # ==> 3
eval "yield 2", binding # ==> LocalJumpError


The puzzle is: why does Binding#eval call the block, but Kernel#eval 
does not? Anyone...?