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class LazyModule < Module
def self.new(&blk)
# passing no-op block overrides &blk
m = super{ }
class << m
include ClassMethods
end
m.lazy_evaluated_body = blk
m
end
module ClassMethods
attr_accessor :lazy_evaluated_body
def included(host)
host.class_eval(&@lazy_evaluated_body)
end
end
end