I’m having trouble understanding why this is:
module A
module B
end
end
A.module_eval “B” -> A::B
A.module_eval do B end -> ERROR!
A.module_eval do self::B end => A::B
Why does the second one error out? If its actually being evaluated
within the scope of the module, it should work…no?
Could someone explain this to me. Is there a trick I’m not doing?
On 11.01.2010 21:42, Aryk G. wrote:
Why does the second one error out? If its actually being evaluated
within the scope of the module, it should work…no?
Could someone explain this to me. Is there a trick I’m not doing?
What version of Ruby did you use? IIRC in 1.8 versions the lookup of
the constant was statically scoped so - since there is no B around - you
get an error. With the other approaches you explicitly start the lookup
at module A. We had a recent discussion about this where I collected
some links about the topic:
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/354034
Kind regards
robert