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Contents
require 'facets/class/hierarchically'
module Kernel
# Send a message to each ancestor in an object's class hierarchy.
# The method will only be called if the method is defined for the
# ancestor.
#
# This can be very useful for setting up a `preinitialize` system.
#
# m = Module.new do
# attr :a
# def preinitialize
# @a = 1
# end
# end
#
# c = Class.new do
# include m
# def initialize
# hierarchical_send(:preinitialize)
# end
# end
#
# c.new.a #=> 1
#
# @todo Include singleton class?
def hierarchical_send(method_name, *args, &block)
method_name = method_name.to_s if RUBY_VERSION < '1.9'
this = self
self.class.hierarchically do |anc|
## is there really no better way to check for the method?
if anc.instance_methods(false).include?(method_name) or
anc.public_instance_methods(false).include?(method_name) or
anc.private_instance_methods(false).include?(method_name) or
anc.protected_instance_methods(false).include?(method_name)
im = anc.instance_method(method_name)
##im.arity == 0 ? im.bind(this).call(&block) : im.bind(this).call(*args, &block)
im.bind(this).call(*args, &block)
end
end
end
end
Version data entries
4 entries across 4 versions & 2 rubygems