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Contents
module Pancake
module Hooks
module InheritableInnerClasses
def self.extended(base)
base.class_eval do
class_inheritable_reader :_inhertiable_inner_classes
@_inhertiable_inner_classes = []
end
end # extended
# Declare inner classes to be inherited when the outer class in inherited
# The best way to show this is by example:
#
# @example
# class Foo
# inheritable_inner_class :Bar
#
# class Bar
# end
# end
#
# class Baz < Foo
# # When Foo is inherited, the following occurs
# class Bar < Foo::Bar; end
# end
#
# This provides a more organic inheritance where the child gets their own
# version of the inner class which is actually inherited from the parents inner class.
# The inheritance chain remains intact.
#
# @api public
# @since 0.1.0
# @author Daniel Neighman
def inheritable_inner_classes(*classes)
_inhertiable_inner_classes
unless classes.empty?
_inhertiable_inner_classes << classes
_inhertiable_inner_classes.flatten!
end
_inhertiable_inner_classes
end
# The inherited hook that sets up inherited inner classes. Remember if you overwrite this method, you should
# call super!
#
# @api private
# @since 0.1.0
# @author Daniel Neighman
def inherited(base)
super
class_defs = inheritable_inner_classes.map do |klass|
"class #{klass} < superclass::#{klass}; end\n"
end
# puts "#{base.name} is INHERITING INNER CLASSES #{class_defs.inspect}"
base.class_eval(class_defs.join)
end
end # InheritableInnerClasses
end # Hooks
end # Pancake
Version data entries
18 entries across 18 versions & 2 rubygems