From: Ryan Davis <ryand-ruby@...>
Date: 2010-02-24T07:56:21+09:00
Subject: [ruby-core:28321] Re: [Bug #2782] Binding#eval not completely indicative of its binding


On Feb 23, 2010, at 05:18 , Thomas Sawyer wrote:

> Bug #2782: Binding#eval not completely indicative of its binding
> http://redmine.ruby-lang.org/issues/show/2782
> 
> Author: Thomas Sawyer
> Status: Open, Priority: Normal
> Category: core
> ruby -v: 1.9.1
> 
> binding.eval("__FILE__") does not return the file from which the binding was created.
> 
> Given the purpose of binding it should hold that:
> 
>  __FILE__ == binding.eval("__FILE__")

Just my two cents: (yen?)

__FILE__ is expanded at parse time directly into the parse tree. As such, it isn't really a variable or a constant, just a placeholder. I don't think it is going to be easy to make it act like a constant for Binding#eval.