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module Concurrent
# Methods form module A included to a module B, which is already included into class C,
# will not be visible in the C class. If this module is extended to B then A's methods
# are correctly made visible to C.
#
# @example
# module A
# def a
# :a
# end
# end
#
# module B1
# end
#
# class C1
# include B1
# end
#
# module B2
# extend Concurrent::ReInclude
# end
#
# class C2
# include B2
# end
#
# B1.send :include, A
# B2.send :include, A
#
# C1.new.respond_to? :a # => false
# C2.new.respond_to? :a # => true
module ReInclude
# @!visibility private
def included(base)
(@re_include_to_bases ||= []) << [:include, base]
super(base)
end
# @!visibility private
def extended(base)
(@re_include_to_bases ||= []) << [:extend, base]
super(base)
end
# @!visibility private
def include(*modules)
result = super(*modules)
modules.reverse.each do |module_being_included|
(@re_include_to_bases ||= []).each do |method, mod|
mod.send method, module_being_included
end
end
result
end
end
end
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