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retired
A standard library for the Gleam programming language
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Files
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(GA) :: {some, GA} | none.
-file("/Users/louis/src/gleam/stdlib/src/gleam/option.gleam", 44).
-spec all_loop(list(option(GG)), list(GG)) -> option(list(GG)).
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(GB))) -> option(list(GB)).
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(GQ), GT) -> {ok, GQ} | {error, GT}.
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, GW} | {error, any()}) -> option(GW).
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(HB), HB) -> HB.
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(HD), fun(() -> HD)) -> HD.
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(HF), fun((HF) -> HH)) -> option(HH).
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(HJ))) -> option(HJ).
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(HN), fun((HN) -> option(HP))) -> option(HP).
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(HS), option(HS)) -> option(HS).
'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(HW), fun(() -> option(HW))) -> option(HW).
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(IE)), list(IE)) -> list(IE).
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(IA))) -> list(IA).
values(Options) ->
values_loop(Options, []).