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|
# = Prepend
#
# This is a module prepend system, which provides an elegant
# way to prepend code to the class hierarchy rather then append
# it (a la #include).
#
# class C
# def f
# "f"
# end
# end
#
# module M
# def f
# '{' + super + '}'
# end
# end
#
# class C
# prepend M
# end
#
# c = C.new
# c.f #=> "{f}"
#
# This works by overriding Class#new so that all prepended modules
# extend new instances of the class upon instantiation.
#
# If needed the original #new method has been aliased as #init.
class Class
#
def prepend(*mods)
@prepend ||= []
@prepend.concat(mods)
@prepend
end
alias_method :init, :new
def new(*args, &blk)
o = allocate
prepend.each do |mod|
o.extend(mod)
end
o.__send__(:initialize, *args, &blk) #if private_method_defined?(:initialize)
o
end
end
|
