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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * Copyright INRIA, CNRS and contributors *)
(* <O___,, * (see version control and CREDITS file for authors & dates) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
(* Some of the below functions are inspired by ocaml-extlib *)
Require Import Ltac2.Init.
Require Import Ltac2.Control.
Ltac2 may (f : 'a -> unit) (ov : 'a option) :=
match ov with
| Some v => f v
| None => ()
end.
Ltac2 map (f : 'a -> 'b) (ov : 'a option) :=
match ov with
| Some v => Some (f v)
| None => None
end.
Ltac2 default (def : 'a) (ov : 'a option) :=
match ov with
| Some v => v
| None => def
end.
Ltac2 map_default (f : 'a -> 'b) (def : 'b) (ov : 'a option) :=
match ov with
| Some v => f v
| None => def
end.
Ltac2 get (ov : 'a option) :=
match ov with
| Some v => v
| None => Control.throw No_value
end.
Ltac2 get_bt (ov : 'a option) :=
match ov with
| Some v => v
| None => Control.zero No_value
end.
Ltac2 bind (x : 'a option) (f : 'a -> 'b option) :=
match x with
| Some x => f x
| None => None
end.
Ltac2 ret (x : 'a) := Some x.
Ltac2 lift (f : 'a -> 'b) (x : 'a option) := map f x.
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