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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, CCW} | {error, CCX}, fun((CCW) -> CDA)) -> {ok, CDA} |
{error, CCX}.
map(Result, Fun) ->
case Result of
{ok, X} ->
{ok, Fun(X)};
{error, E} ->
{error, E}
end.
-spec map_error({ok, CDD} | {error, CDE}, fun((CDE) -> CDH)) -> {ok, CDD} |
{error, CDH}.
map_error(Result, Fun) ->
case Result of
{ok, X} ->
{ok, X};
{error, Error} ->
{error, Fun(Error)}
end.
-spec flatten({ok, {ok, CDK} | {error, CDL}} | {error, CDL}) -> {ok, CDK} |
{error, CDL}.
flatten(Result) ->
case Result of
{ok, X} ->
X;
{error, Error} ->
{error, Error}
end.
-spec then({ok, CDS} | {error, CDT}, fun((CDS) -> {ok, CDW} | {error, CDT})) -> {ok,
CDW} |
{error, CDT}.
then(Result, Fun) ->
case Result of
{ok, X} ->
Fun(X);
{error, E} ->
{error, E}
end.
-spec unwrap({ok, CEB} | {error, any()}, CEB) -> CEB.
unwrap(Result, Default) ->
case Result of
{ok, V} ->
V;
{error, _@1} ->
Default
end.
-spec lazy_unwrap({ok, CEF} | {error, any()}, fun(() -> CEF)) -> CEF.
lazy_unwrap(Result, Default) ->
case Result of
{ok, V} ->
V;
{error, _@1} ->
Default()
end.
-spec unwrap_error({ok, any()} | {error, CEK}, CEK) -> CEK.
unwrap_error(Result, Default) ->
case Result of
{ok, _@1} ->
Default;
{error, E} ->
E
end.
-spec unwrap_both({ok, CEN} | {error, CEN}) -> CEN.
unwrap_both(Result) ->
case Result of
{ok, A} ->
A;
{error, A@1} ->
A@1
end.
-spec nil_error({ok, CEQ} | {error, any()}) -> {ok, CEQ} | {error, nil}.
nil_error(Result) ->
map_error(Result, fun(_) -> nil end).
-spec 'or'({ok, CEW} | {error, CEX}, {ok, CEW} | {error, CEX}) -> {ok, CEW} |
{error, CEX}.
'or'(First, Second) ->
case First of
{ok, _@1} ->
First;
{error, _@2} ->
Second
end.
-spec lazy_or({ok, CFE} | {error, CFF}, fun(() -> {ok, CFE} | {error, CFF})) -> {ok,
CFE} |
{error, CFF}.
lazy_or(First, Second) ->
case First of
{ok, _@1} ->
First;
{error, _@2} ->
Second()
end.
-spec all(list({ok, CFM} | {error, CFN})) -> {ok, list(CFM)} | {error, CFN}.
all(Results) ->
gleam@list:try_map(Results, fun(X) -> X end).
-spec replace({ok, any()} | {error, CFV}, CFY) -> {ok, CFY} | {error, CFV}.
replace(Result, Value) ->
case Result of
{ok, _@1} ->
{ok, Value};
{error, Error} ->
{error, Error}
end.
-spec replace_error({ok, CGB} | {error, any()}, CGF) -> {ok, CGB} | {error, CGF}.
replace_error(Result, Error) ->
case Result of
{ok, X} ->
{ok, X};
{error, _@1} ->
{error, Error}
end.
-spec values(list({ok, CGI} | {error, any()})) -> list(CGI).
values(Results) ->
gleam@list:filter_map(Results, fun(R) -> R end).