[MacRuby-devel] [MacRuby] #208: Making #binding public returns wrong binding.

16 Jan 2009

      #208: Making #binding public returns wrong binding.
-------------------------------------+--------------------------------------
 Reporter:  eloy.de.enige@…          |       Owner:  lsansonetti@…        
     Type:  defect                   |      Status:  new                  
 Priority:  blocker                  |   Milestone:                       
Component:  MacRuby                  |    Keywords:                       
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 Making the binding instance method of a class public does not return the
 expected binding. Rather it returns the binding from where the caller.

 Adding a public instance method which returns its private binding works as
 expected though. So I'm guessing it goes wrong somewhere in the ‘making a
 method public’ process.

 Consider:

 {{{
 class Foo
   def name
     "foo"
   end

   def b
     binding
   end
 end

 # untitled:13:in `eval': undefined local variable or method `name' for
 main:NSObject (NameError)
 #
 # p eval("name", Foo.new.send(:binding))

 # untitled:17:in `eval': undefined local variable or method `name' for
 main:NSObject (NameError)
 #
 # Foo.send(:public, :binding)
 # p eval("name", Foo.new.binding)

 # "foo"
 p eval("name", Foo.new.b)
 }}}

 And here you can see that it in fact returns the binding of the caller,
 not the Foo instance:

 {{{
 lvar = "lvar"
 Foo.send(:public, :binding)
 p eval("local_variables", Foo.new.binding) # => [:lvar]
 }}}

-- 
Ticket URL: <http://www.macruby.org/trac/ticket/208>
MacRuby <http://macruby.org/>