From: transfire@...
Date: 2006-06-03T03:04:44+09:00
Subject: Re: object::foo syntax -- get a Method object?

This is taken from facet/kernel/method.rb:

#--
# NOTES:
#
#   First Class Methods
#
#   I think the best solution would be using the notation
#   <tt>::ameth</tt>. This would require some minor changes
#   to Ruby, but with few backward incompatabilites if
#   parantheticals revert back to the actual method invocation.
#   Although this later stipulation means capitalized methods
#   would not be accessible in this way b/c they would intefere with
#   constant lookup. It's a trade off.
#
#                   Current           Proposed           Alternate
#                   ----------------- ------------------
-------------------
#     Foo.Bar()     method call       method call        method call
#     Foo.Bar       method call       method call        method call
#     Foo.bar()     method call       method call        method call
#     Foo.bar       method call       method call        method call
#     Foo::Bar()    method call       method call        1st class
method
#     Foo::Bar      constant lookup   constant lookup    constant
lookup
#     Foo::bar()    method call       method call        1st class
method
#     Foo::bar      method call       1st class method   1st class
method
#
#   Then again this dosen't address bound versus unbound!!!
#
#   Which do you prefer?
#++

class Object

  # Easy access to method as objects, and they retain state!
  #
  #   def hello
  #     puts "Hello World!"
  #   end
  #   p method!(:hello)   #=> <Method: #hello>
  #
  def method!(s)
    ( @__methods__ ||= {} )[s] ||= method(s)
  end

end