b6449cae87
* `lib_stdlib`: basic extended OCaml stdlib and generic data structures
* `lib_data_encoding`: almost independant 'Data_encoding'
* `lib_error_monad`: almost independant 'Error_monad'
* `lib_stdlib_lwt`: extended Lwt library
* `lib_crypto`: all the crypto stuff (hashing, signing, cryptobox).
* `lib_base`:
- basic type definitions (Block_header, Operation, ...)
- a module `TzPervasives` to bind them all and to be the
single module opened everywhere.
In the process, I splitted `Tezos_data` and `Hash` in multiple
submodules, thus removing a lot of `-open`.
The following two modules may not have found their place yet:
- Base58 (currently in `lib_crypto`)
- Cli_entries (currently in `lib_stdlib_lwt`)
35 lines
1.0 KiB
OCaml
35 lines
1.0 KiB
OCaml
(**************************************************************************)
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(* *)
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(* Copyright (c) 2014 - 2017. *)
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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 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 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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