Like this:
module M
def self.before(*names)
names.each do |name|
m = instance_method(name)
define_method(name) do |*args, &block|
yield
m.bind(self).(*args, &block)
end
end
end
end
module M
def hello
puts "yo"
end
def bye
puts "bum"
end
before(*instance_methods) { puts "start" }
end
class C
include M
end
C.new.bye #=> "start" "bum"
C.new.hello #=> "start" "yo"