From: Alexandre Mutel <alexandre_mutel@...>
Date: 2009-12-02T03:32:47+09:00
Subject: Re: Ruby should support consistent constant lookup (and dynamic)

Walton Hoops wrote:
> irb(main):012:0> A::B.foo do
> irb(main):013:1* puts eval('BAR')
> irb(main):014:1> end
> 1
> => nil
> 
> Done.  A more experienced Rubist may be able to do it without eval, but
> that works.

Oh, thanks, at least the eval is working on constants with 1.9, this is 
good to know.

> 
>> Should'nt this constant lookup be consistent between static and
>> const_get?
> 
> No, that's not what const_get is for.  It's operating on a class
> not a scope.  That's why it's an instance method.  The way you
> calling it is literally equivalent too:
> 
> A::B.const_get(:BAR)
> 
> In other words, you are asking for _B's_ constants.  Since B,
> nor any of its ancestors have the constant BAR, an error occurs.

I understand the current const_get behavior, but still, it would be nice 
to have something equivalent to fully resolving a constant in a faster 
way without going through the eval way.

I was thinking about a const_get with an aditionnal parameter like
def const_get(symbol, check_module_hierarchy=false) {}, still living 
this method in the module.

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