From: Greg Hauptmann <greg.hauptmann.ruby@...>
Date: 2008-06-15T22:55:23+09:00
Subject: Re: why can't an instance instantiated within a class method access a protected instance method?

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On Sun, Jun 15, 2008 at 11:29 PM, Robert Klemme <shortcutter@googlemail.com>
wrote:

> On 15.06.2008 15:17, Greg Hauptmann wrote:
>
>> Thanks - can I ask:
>>
>
> Guess so.
>
>  (a) what do you mean by "explicit" - just to understand
>>
>
> no_explicit_receiver()
> self.has_explicit_receiver()
>
>  (b) is there a way I can adjust my code so that I can leave methods like
>> "reconcile_one" private or protected, i.e. not really to be available to
>> the
>> outside world (except in this case where I'm calling it from with an
>> instance of the class really, but it's just the logistics of Ruby that
>> isn't
>> allowing it to work...if I've understood things correctly)
>>
>
> You can use #send or #instance_eval, e.g.
>
> irb(main):001:0> class F
> irb(main):002:1> protected
> irb(main):003:1> def x;1 end
> irb(main):004:1> end
> => nil
> irb(main):005:0> f=F.new
> => #<F:0x7ff94460>
> irb(main):006:0> f.x
> NoMethodError: protected method `x' called for #<F:0x7ff94460>
>        from (irb):6
>        from :0
> irb(main):007:0> f.instance_eval { x }
> => 1
> irb(main):008:0> f.send :x
> => 1
> irb(main):009:0>
>
> Cheers
>
>        robert
>

Thanks Robert - do you understand why Ruby allows the "send :x" method to
work here, but not the ".x" out of curiosity?  Does this make sense to
people it should do this?
Greg

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