46 lines
1.2 KiB
OCaml
46 lines
1.2 KiB
OCaml
(**************************************************************************)
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(* *)
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(* Copyright (c) 2014 - 2018. *)
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(* Dynamic Ledger Solutions, Inc. <contact@tezos.com> *)
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(* *)
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(* All rights reserved. No warranty, explicit or implicit, provided. *)
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(* *)
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(**************************************************************************)
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let map ~f = function
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| None -> None
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| Some x -> Some (f x)
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let apply ~f = function
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| None -> None
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| Some x -> f x
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let (>>=) x f = apply ~f x
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let (>>|) x f = map ~f x
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let iter ~f = function
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| None -> ()
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| Some x -> f x
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let unopt ~default = function
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| None -> default
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| Some x -> x
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let unopt_map ~f ~default = function
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| None -> default
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| Some x -> f x
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let unopt_exn err = function
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| Some x -> x
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| _ -> raise err
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let first_some a b = match a, b with
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| None, None -> None
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| None, Some v -> Some v
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| Some v, _ -> Some v
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let try_with f =
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try Some (f ()) with _ -> None
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let some x = Some x
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