hey c++ users…what does this do??

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def h(n) : return (lambda f: (lambda x: f(f, x)) (lambda f, x: n if x 0 else x f(f, x – 1) (f) )) (lambda f, x: n if x 0 else x f(f, x – 1) (f)) if n 0 else (lambda f: (lambda x: f(f, x)) (lambda f, x: -n if x 0 else x f(f, x – 1) (f) )) (lambda f, x: -n if x 0 else f (f, X – 1) (f) ) ProgrammerHumo