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A standard library for the Gleam programming language

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gleam_stdlib src gleam@option.erl
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src/gleam@option.erl 

-module(gleam@option).

-compile([no_auto_import, nowarn_unused_vars, nowarn_unused_function, nowarn_nomatch]).



-export([all/1, is_some/1, is_none/1, to_result/2, from_result/1, unwrap/2, lazy_unwrap/2, map/2, flatten/1, then/2, 'or'/2, lazy_or/2, values/1]).

-export_type([option/1]).



-type option(FZ) :: {some, FZ} | none.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 44).

-spec all_loop(list(option(GF)), list(GF)) -> option(list(GF)).

all_loop(List, Acc) ->

    case List of

        [] ->

            {some, Acc};



        [X | Rest] ->

            Accumulate = fun(Acc@1, Item) -> case {Acc@1, Item} of

                    {{some, Values}, {some, Value}} ->

                        {some, [Value | Values]};



                    {_, _} ->

                        none

                end end,

            Accumulate(all_loop(Rest, Acc), X)

    end.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 40).

-spec all(list(option(GA))) -> option(list(GA)).

all(List) ->

    all_loop(List, []).



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 73).

-spec is_some(option(any())) -> boolean().

is_some(Option) ->

    Option /= none.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 91).

-spec is_none(option(any())) -> boolean().

is_none(Option) ->

    Option =:= none.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 109).

-spec to_result(option(GP), GS) -> {ok, GP} | {error, GS}.

to_result(Option, E) ->

    case Option of

        {some, A} ->

            {ok, A};



        _ ->

            {error, E}

    end.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 130).

-spec from_result({ok, GV} | {error, any()}) -> option(GV).

from_result(Result) ->

    case Result of

        {ok, A} ->

            {some, A};



        _ ->

            none

    end.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 151).

-spec unwrap(option(HA), HA) -> HA.

unwrap(Option, Default) ->

    case Option of

        {some, X} ->

            X;



        none ->

            Default

    end.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 172).

-spec lazy_unwrap(option(HC), fun(() -> HC)) -> HC.

lazy_unwrap(Option, Default) ->

    case Option of

        {some, X} ->

            X;



        none ->

            Default()

    end.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 197).

-spec map(option(HE), fun((HE) -> HG)) -> option(HG).

map(Option, Fun) ->

    case Option of

        {some, X} ->

            {some, Fun(X)};



        none ->

            none

    end.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 223).

-spec flatten(option(option(HI))) -> option(HI).

flatten(Option) ->

    case Option of

        {some, X} ->

            X;



        none ->

            none

    end.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 262).

-spec then(option(HM), fun((HM) -> option(HO))) -> option(HO).

then(Option, Fun) ->

    case Option of

        {some, X} ->

            Fun(X);



        none ->

            none

    end.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 293).

-spec 'or'(option(HR), option(HR)) -> option(HR).

'or'(First, Second) ->

    case First of

        {some, _} ->

            First;



        none ->

            Second

    end.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 324).

-spec lazy_or(option(HV), fun(() -> option(HV))) -> option(HV).

lazy_or(First, Second) ->

    case First of

        {some, _} ->

            First;



        none ->

            Second()

    end.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 345).

-spec values_loop(list(option(ID)), list(ID)) -> list(ID).

values_loop(List, Acc) ->

    case List of

        [] ->

            Acc;



        [First | Rest] ->

            Accumulate = fun(Acc@1, Item) -> case Item of

                    {some, Value} ->

                        [Value | Acc@1];



                    none ->

                        Acc@1

                end end,

            Accumulate(values_loop(Rest, Acc), First)

    end.



-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 341).

-spec values(list(option(HZ))) -> list(HZ).

values(Options) ->

    values_loop(Options, []).