Sha256: 4f080eccd6808007c493b3b0ca4ac22e5c9fbd83f20494fd97c8ec5a74c93b20
Contents?: true
Size: 1.09 KB
Versions: 10
Compression:
Stored size: 1.09 KB
Contents
class Class
# Prepend an "aspect module" to a class.
#
# class Firetruck
# def put_out_fire(option)
# "Put out #{option}"
# end
# end
#
# module FastFiretruck
# def put_out_fire(option)
# super("very #{option}!")
# end
# end
#
# Firetruck.prepend(FastFiretruck)
#
# ft = Firetruck.new
# ft.put_out_fire('fast') #=> "Put out very fast!"
#
# Implementation of this method has some limitations,
# in that it works by overriding #new and #allocate.
#
# CREDIT: Trans
#
# TODO: Perhaps rename this to preallocate, b/c of
# the way it works. It is not really a clean
# prepend, like that of Module#prepend.
def prepend( aspect )
_new = method(:new)
_allocate = method(:allocate)
(class << self; self; end).class_eval do
define_method(:new) do |*args|
o = _new.call(*args)
o.extend aspect
o
end
define_method(:allocate) do |*args|
o = _allocate.call(*args)
o.extend aspect
o
end
end
end
#alias_method :preallocate, :prepend
end
Version data entries
10 entries across 10 versions & 1 rubygems