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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, _} ->
false;
{ok, _} ->
true
end.
-spec is_error({ok, any()} | {error, any()}) -> boolean().
is_error(Result) ->
case Result of
{ok, _} ->
false;
{error, _} ->
true
end.
-spec map({ok, BBX} | {error, BBY}, fun((BBX) -> BCB)) -> {ok, BCB} |
{error, BBY}.
map(Result, Fun) ->
case Result of
{ok, X} ->
{ok, Fun(X)};
{error, E} ->
{error, E}
end.
-spec map_error({ok, BCE} | {error, BCF}, fun((BCF) -> BCI)) -> {ok, BCE} |
{error, BCI}.
map_error(Result, Fun) ->
case Result of
{ok, X} ->
{ok, X};
{error, Error} ->
{error, Fun(Error)}
end.
-spec flatten({ok, {ok, BCL} | {error, BCM}} | {error, BCM}) -> {ok, BCL} |
{error, BCM}.
flatten(Result) ->
case Result of
{ok, X} ->
X;
{error, Error} ->
{error, Error}
end.
-spec then({ok, BCT} | {error, BCU}, fun((BCT) -> {ok, BCX} | {error, BCU})) -> {ok,
BCX} |
{error, BCU}.
then(Result, Fun) ->
case Result of
{ok, X} ->
Fun(X);
{error, E} ->
{error, E}
end.
-spec unwrap({ok, BDC} | {error, any()}, BDC) -> BDC.
unwrap(Result, Default) ->
case Result of
{ok, V} ->
V;
{error, _} ->
Default
end.
-spec lazy_unwrap({ok, BDG} | {error, any()}, fun(() -> BDG)) -> BDG.
lazy_unwrap(Result, Default) ->
case Result of
{ok, V} ->
V;
{error, _} ->
Default()
end.
-spec unwrap_error({ok, any()} | {error, BDL}, BDL) -> BDL.
unwrap_error(Result, Default) ->
case Result of
{ok, _} ->
Default;
{error, E} ->
E
end.
-spec unwrap_both({ok, BDO} | {error, BDO}) -> BDO.
unwrap_both(Result) ->
case Result of
{ok, A} ->
A;
{error, A@1} ->
A@1
end.
-spec nil_error({ok, BDR} | {error, any()}) -> {ok, BDR} | {error, nil}.
nil_error(Result) ->
map_error(Result, fun(_) -> nil end).
-spec 'or'({ok, BDX} | {error, BDY}, {ok, BDX} | {error, BDY}) -> {ok, BDX} |
{error, BDY}.
'or'(First, Second) ->
case First of
{ok, _} ->
First;
{error, _} ->
Second
end.
-spec lazy_or({ok, BEF} | {error, BEG}, fun(() -> {ok, BEF} | {error, BEG})) -> {ok,
BEF} |
{error, BEG}.
lazy_or(First, Second) ->
case First of
{ok, _} ->
First;
{error, _} ->
Second()
end.
-spec all(list({ok, BEN} | {error, BEO})) -> {ok, list(BEN)} | {error, BEO}.
all(Results) ->
gleam@list:try_map(Results, fun(X) -> X end).
-spec replace({ok, any()} | {error, BEW}, BEZ) -> {ok, BEZ} | {error, BEW}.
replace(Result, Value) ->
case Result of
{ok, _} ->
{ok, Value};
{error, Error} ->
{error, Error}
end.
-spec replace_error({ok, BFC} | {error, any()}, BFG) -> {ok, BFC} | {error, BFG}.
replace_error(Result, Error) ->
case Result of
{ok, X} ->
{ok, X};
{error, _} ->
{error, Error}
end.
-spec values(list({ok, BFJ} | {error, any()})) -> list(BFJ).
values(Results) ->
gleam@list:filter_map(Results, fun(R) -> R end).