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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, AWI} | {error, AWJ}, fun((AWI) -> AWM)) -> {ok, AWM} |
{error, AWJ}.
map(Result, Fun) ->
case Result of
{ok, X} ->
{ok, Fun(X)};
{error, E} ->
{error, E}
end.
-spec map_error({ok, AWP} | {error, AWQ}, fun((AWQ) -> AWT)) -> {ok, AWP} |
{error, AWT}.
map_error(Result, Fun) ->
case Result of
{ok, X} ->
{ok, X};
{error, Error} ->
{error, Fun(Error)}
end.
-spec flatten({ok, {ok, AWW} | {error, AWX}} | {error, AWX}) -> {ok, AWW} |
{error, AWX}.
flatten(Result) ->
case Result of
{ok, X} ->
X;
{error, Error} ->
{error, Error}
end.
-spec then({ok, AXE} | {error, AXF}, fun((AXE) -> {ok, AXI} | {error, AXF})) -> {ok,
AXI} |
{error, AXF}.
then(Result, Fun) ->
case Result of
{ok, X} ->
Fun(X);
{error, E} ->
{error, E}
end.
-spec unwrap({ok, AXN} | {error, any()}, AXN) -> AXN.
unwrap(Result, Default) ->
case Result of
{ok, V} ->
V;
{error, _@1} ->
Default
end.
-spec lazy_unwrap({ok, AXR} | {error, any()}, fun(() -> AXR)) -> AXR.
lazy_unwrap(Result, Default) ->
case Result of
{ok, V} ->
V;
{error, _@1} ->
Default()
end.
-spec unwrap_error({ok, any()} | {error, AXW}, AXW) -> AXW.
unwrap_error(Result, Default) ->
case Result of
{ok, _@1} ->
Default;
{error, E} ->
E
end.
-spec unwrap_both({ok, AXZ} | {error, AXZ}) -> AXZ.
unwrap_both(Result) ->
case Result of
{ok, A} ->
A;
{error, A@1} ->
A@1
end.
-spec nil_error({ok, AYC} | {error, any()}) -> {ok, AYC} | {error, nil}.
nil_error(Result) ->
map_error(Result, fun(_) -> nil end).
-spec 'or'({ok, AYI} | {error, AYJ}, {ok, AYI} | {error, AYJ}) -> {ok, AYI} |
{error, AYJ}.
'or'(First, Second) ->
case First of
{ok, _@1} ->
First;
{error, _@2} ->
Second
end.
-spec lazy_or({ok, AYQ} | {error, AYR}, fun(() -> {ok, AYQ} | {error, AYR})) -> {ok,
AYQ} |
{error, AYR}.
lazy_or(First, Second) ->
case First of
{ok, _@1} ->
First;
{error, _@2} ->
Second()
end.
-spec all(list({ok, AYY} | {error, AYZ})) -> {ok, list(AYY)} | {error, AYZ}.
all(Results) ->
gleam@list:try_map(Results, fun(X) -> X end).
-spec replace({ok, any()} | {error, AZH}, AZK) -> {ok, AZK} | {error, AZH}.
replace(Result, Value) ->
case Result of
{ok, _@1} ->
{ok, Value};
{error, Error} ->
{error, Error}
end.
-spec replace_error({ok, AZN} | {error, any()}, AZR) -> {ok, AZN} | {error, AZR}.
replace_error(Result, Error) ->
case Result of
{ok, X} ->
{ok, X};
{error, _@1} ->
{error, Error}
end.
-spec values(list({ok, AZU} | {error, any()})) -> list(AZU).
values(Results) ->
gleam@list:filter_map(Results, fun(R) -> R end).