-module(gleam@option).
-compile(no_auto_import).

-export([is_some/1, is_none/1, to_result/2, from_result/1, unwrap/2]).

is_some(Option) ->
    Option /= none.

is_none(Option) ->
    Option =:= none.

to_result(Option, E) ->
    case Option of
        {some, A} ->
            {ok, A};

        _ ->
            {error, E}
    end.

from_result(Result) ->
    case Result of
        {ok, A} ->
            {some, A};

        _ ->
            none
    end.

unwrap(Option, Default) ->
    case Option of
        {some, X} ->
            X;

        none ->
            Default
    end.