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gleam_stdlib
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retired
A standard library for the Gleam programming language
Current section
Files
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Files
gen/src/gleam@option.erl
-module(gleam@option).
-compile(no_auto_import).
-export([is_some/1, is_none/1, to_result/2, from_result/1, unwrap/2, map/2, flatten/1, then/2, 'or'/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.
map(Option, Fun) ->
case Option of
{some, X} ->
{some, Fun(X)};
none ->
none
end.
flatten(Option) ->
case Option of
{some, X} ->
X;
none ->
none
end.
then(Option, Fun) ->
case Option of
{some, X} ->
Fun(X);
none ->
none
end.
'or'(First, Second) ->
case First of
{some, _} ->
First;
none ->
Second
end.