24 lines
564 B
OCaml
Executable File
24 lines
564 B
OCaml
Executable File
open General
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let return (x : 'a) : 'a option = Some x
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let ( ~= ) = return
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let bind (x : 'a option) (f : 'a -> 'b option) : 'b option =
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match x with
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| None -> None
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| Some a -> f a
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let ( >>= ) = bind
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let binary_operator (x : 'a option) (y : 'b option) (f : 'a -> 'b -> 'c) : 'c option =
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x >>= (fun a -> y >>= (fun b -> ~= (f a b)))
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let map (x : 'a option) (f : 'a -> 'b) : 'b option =
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x >>= (fun a -> ~= (f a))
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let compose (f : 'a -> 'b option) (g : 'b -> 'c option) : 'a -> 'c option =
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(fun x -> f x >>= g)
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let ( >=> ) = compose |