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retired
A standard library for the Gleam programming language
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Files
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Files
src/gleam@result.erl
-module(gleam@result).
-compile(no_auto_import).
-export([is_ok/1, is_error/1, map/2, map_error/2, flatten/1, then/2, unwrap/2, lazy_unwrap/2, unwrap_error/2, unwrap_both/1, nil_error/1, 'or'/2, lazy_or/2, all/1, replace/2, replace_error/2, values/1]).
-spec is_ok({ok, any()} | {error, any()}) -> boolean().
is_ok(Result) ->
case Result of
{error, _@1} ->
false;
{ok, _@2} ->
true
end.
-spec is_error({ok, any()} | {error, any()}) -> boolean().
is_error(Result) ->
case Result of
{ok, _@1} ->
false;
{error, _@2} ->
true
end.
-spec map({ok, ALY} | {error, ALZ}, fun((ALY) -> AMC)) -> {ok, AMC} |
{error, ALZ}.
map(Result, Fun) ->
case Result of
{ok, X} ->
{ok, Fun(X)};
{error, E} ->
{error, E}
end.
-spec map_error({ok, AMF} | {error, AMG}, fun((AMG) -> AMJ)) -> {ok, AMF} |
{error, AMJ}.
map_error(Result, Fun) ->
case Result of
{ok, X} ->
{ok, X};
{error, Error} ->
{error, Fun(Error)}
end.
-spec flatten({ok, {ok, AMM} | {error, AMN}} | {error, AMN}) -> {ok, AMM} |
{error, AMN}.
flatten(Result) ->
case Result of
{ok, X} ->
X;
{error, Error} ->
{error, Error}
end.
-spec then({ok, AMU} | {error, AMV}, fun((AMU) -> {ok, AMY} | {error, AMV})) -> {ok,
AMY} |
{error, AMV}.
then(Result, Fun) ->
case Result of
{ok, X} ->
Fun(X);
{error, E} ->
{error, E}
end.
-spec unwrap({ok, AND} | {error, any()}, AND) -> AND.
unwrap(Result, Default) ->
case Result of
{ok, V} ->
V;
{error, _@1} ->
Default
end.
-spec lazy_unwrap({ok, ANH} | {error, any()}, fun(() -> ANH)) -> ANH.
lazy_unwrap(Result, Default) ->
case Result of
{ok, V} ->
V;
{error, _@1} ->
Default()
end.
-spec unwrap_error({ok, any()} | {error, ANM}, ANM) -> ANM.
unwrap_error(Result, Default) ->
case Result of
{ok, _@1} ->
Default;
{error, E} ->
E
end.
-spec unwrap_both({ok, ANP} | {error, ANP}) -> ANP.
unwrap_both(Result) ->
case Result of
{ok, A} ->
A;
{error, A@1} ->
A@1
end.
-spec nil_error({ok, ANS} | {error, any()}) -> {ok, ANS} | {error, nil}.
nil_error(Result) ->
map_error(Result, fun(_) -> nil end).
-spec 'or'({ok, ANY} | {error, ANZ}, {ok, ANY} | {error, ANZ}) -> {ok, ANY} |
{error, ANZ}.
'or'(First, Second) ->
case First of
{ok, _@1} ->
First;
{error, _@2} ->
Second
end.
-spec lazy_or({ok, AOG} | {error, AOH}, fun(() -> {ok, AOG} | {error, AOH})) -> {ok,
AOG} |
{error, AOH}.
lazy_or(First, Second) ->
case First of
{ok, _@1} ->
First;
{error, _@2} ->
Second()
end.
-spec all(list({ok, AOO} | {error, AOP})) -> {ok, list(AOO)} | {error, AOP}.
all(Results) ->
gleam@list:try_map(Results, fun(X) -> X end).
-spec replace({ok, any()} | {error, AOX}, APA) -> {ok, APA} | {error, AOX}.
replace(Result, Value) ->
case Result of
{ok, _@1} ->
{ok, Value};
{error, Error} ->
{error, Error}
end.
-spec replace_error({ok, APD} | {error, any()}, APH) -> {ok, APD} | {error, APH}.
replace_error(Result, Error) ->
case Result of
{ok, X} ->
{ok, X};
{error, _@1} ->
{error, Error}
end.
-spec values(list({ok, APK} | {error, any()})) -> list(APK).
values(Results) ->
gleam@list:filter_map(Results, fun(R) -> R end).