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retired
A standard library for the Gleam programming language
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Files
src/gleam@result.erl
-module(gleam@result).
-compile([no_auto_import, nowarn_unused_vars]).
-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, BBZ} | {error, BCA}, fun((BBZ) -> BCD)) -> {ok, BCD} |
{error, BCA}.
map(Result, Fun) ->
case Result of
{ok, X} ->
{ok, Fun(X)};
{error, E} ->
{error, E}
end.
-spec map_error({ok, BCG} | {error, BCH}, fun((BCH) -> BCK)) -> {ok, BCG} |
{error, BCK}.
map_error(Result, Fun) ->
case Result of
{ok, X} ->
{ok, X};
{error, Error} ->
{error, Fun(Error)}
end.
-spec flatten({ok, {ok, BCN} | {error, BCO}} | {error, BCO}) -> {ok, BCN} |
{error, BCO}.
flatten(Result) ->
case Result of
{ok, X} ->
X;
{error, Error} ->
{error, Error}
end.
-spec then({ok, BCV} | {error, BCW}, fun((BCV) -> {ok, BCZ} | {error, BCW})) -> {ok,
BCZ} |
{error, BCW}.
then(Result, Fun) ->
case Result of
{ok, X} ->
Fun(X);
{error, E} ->
{error, E}
end.
-spec unwrap({ok, BDE} | {error, any()}, BDE) -> BDE.
unwrap(Result, Default) ->
case Result of
{ok, V} ->
V;
{error, _} ->
Default
end.
-spec lazy_unwrap({ok, BDI} | {error, any()}, fun(() -> BDI)) -> BDI.
lazy_unwrap(Result, Default) ->
case Result of
{ok, V} ->
V;
{error, _} ->
Default()
end.
-spec unwrap_error({ok, any()} | {error, BDN}, BDN) -> BDN.
unwrap_error(Result, Default) ->
case Result of
{ok, _} ->
Default;
{error, E} ->
E
end.
-spec unwrap_both({ok, BDQ} | {error, BDQ}) -> BDQ.
unwrap_both(Result) ->
case Result of
{ok, A} ->
A;
{error, A@1} ->
A@1
end.
-spec nil_error({ok, BDT} | {error, any()}) -> {ok, BDT} | {error, nil}.
nil_error(Result) ->
map_error(Result, fun(_) -> nil end).
-spec 'or'({ok, BDZ} | {error, BEA}, {ok, BDZ} | {error, BEA}) -> {ok, BDZ} |
{error, BEA}.
'or'(First, Second) ->
case First of
{ok, _} ->
First;
{error, _} ->
Second
end.
-spec lazy_or({ok, BEH} | {error, BEI}, fun(() -> {ok, BEH} | {error, BEI})) -> {ok,
BEH} |
{error, BEI}.
lazy_or(First, Second) ->
case First of
{ok, _} ->
First;
{error, _} ->
Second()
end.
-spec all(list({ok, BEP} | {error, BEQ})) -> {ok, list(BEP)} | {error, BEQ}.
all(Results) ->
gleam@list:try_map(Results, fun(X) -> X end).
-spec replace({ok, any()} | {error, BEY}, BFB) -> {ok, BFB} | {error, BEY}.
replace(Result, Value) ->
case Result of
{ok, _} ->
{ok, Value};
{error, Error} ->
{error, Error}
end.
-spec replace_error({ok, BFE} | {error, any()}, BFI) -> {ok, BFE} | {error, BFI}.
replace_error(Result, Error) ->
case Result of
{ok, X} ->
{ok, X};
{error, _} ->
{error, Error}
end.
-spec values(list({ok, BFL} | {error, any()})) -> list(BFL).
values(Results) ->
gleam@list:filter_map(Results, fun(R) -> R end).