Err<T extends Object> class final

A Monad that represents the failure case of a Result, containing an error value.

Inheritance
Implemented types
Available extensions

Constructors

Err(Object value, {int? statusCode})
Creates a new Err from value and an optional statusCode.
Err.fromModel(ErrModel model)
Creates an Err from an ErrModel.
factory

Properties

error → Object
no setter
hashCode → int
The hash code for this object.
no setterinherited
props → List<Object?>
The list of properties that will be used to determine whether two instances are equal.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
stackTrace → Trace
The stack trace captured when the Err was created.
final
statusCode → Option<int>
An optional HTTP status code associated with the error.
final
stringify → bool?
If set to true, the toString method will be overridden to output this instance's props.
no setterinherited
value → Object
no setteroverride

Methods

asResult() → Result<T>
Returns this as a base Result type.
inherited
asVoid() → Err<void>
Transforms the contained value to void.
override
end() → void
Suppresses the linter error must_use_monad.
inherited
err() → Some<Err<T>>
Safely gets the Err instance. Returns a Some on Err, or a None on Ok.
override
errOr(Result<T> other) → Result<T>
Returns this if it's Err, otherwise returns the other Result.
override
flatMap<R extends Object>(Result<R> noFuturesAllowed(T value)) → Result<R>
Maps a Result<T> to Result<R> by applying a function that returns another Result.
override
flatten() → Result<T>

Available on Result<Result<Result<Result<Result<Result<Result<Result<Result<T>>>>>>>>>, provided by the FlattenResult9 extension

flatten() → Result<T>

Available on Result<Result<T>>, provided by the FlattenResult2 extension

flatten() → Result<T>

Available on Result<Result<Result<T>>>, provided by the FlattenResult3 extension

flatten() → Result<T>

Available on Result<Result<Result<Result<T>>>>, provided by the FlattenResult4 extension

flatten() → Result<T>

Available on Result<Result<Result<Result<Result<T>>>>>, provided by the FlattenResult5 extension

flatten() → Result<T>

Available on Result<Result<Result<Result<Result<Result<T>>>>>>, provided by the FlattenResult6 extension

flatten() → Result<T>

Available on Result<Result<Result<Result<Result<Result<Result<T>>>>>>>, provided by the FlattenResult7 extension

flatten() → Result<T>

Available on Result<Result<Result<Result<Result<Result<Result<Result<T>>>>>>>>, provided by the FlattenResult8 extension

flatten2() → Result<T>

Available on Result<Result<T>>, provided by the FlattenResult2 extension

flatten3() → Result<T>

Available on Result<Result<Result<T>>>, provided by the FlattenResult3 extension

flatten4() → Result<T>

Available on Result<Result<Result<Result<T>>>>, provided by the FlattenResult4 extension

flatten5() → Result<T>

Available on Result<Result<Result<Result<Result<T>>>>>, provided by the FlattenResult5 extension

flatten6() → Result<T>

Available on Result<Result<Result<Result<Result<Result<T>>>>>>, provided by the FlattenResult6 extension

flatten7() → Result<T>

Available on Result<Result<Result<Result<Result<Result<Result<T>>>>>>>, provided by the FlattenResult7 extension

flatten8() → Result<T>

Available on Result<Result<Result<Result<Result<Result<Result<Result<T>>>>>>>>, provided by the FlattenResult8 extension

flatten9() → Result<T>

Available on Result<Result<Result<Result<Result<Result<Result<Result<Result<T>>>>>>>>>, provided by the FlattenResult9 extension

fold(Result<Object>? onOk(Ok<T> ok), Result<Object>? onErr(Err<T> err)) → Result<Object>
Folds the two cases of this Result into a single new Result.
override
ifErr(void noFuturesAllowed(Err<T> err)) → Err<T>
Performs a side-effect with the contained error if this is an Err.
override
ifOk(void noFuturesAllowed(Ok<T> ok)) → Err<T>
Performs a side-effect with the contained value if this is an Ok.
override
isErr() → bool
Returns true if this Result is an Err.
override
isOk() → bool
Returns true if this Result is an Ok.
override
map<R extends Object>(R noFuturesAllowed(T value)) → Err<R>
Transforms the contained value using the mapper function noFuturesAllowed while preserving the Monad's structure.
override
map10<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Object>>>>>>>>>>, provided by the MapMonad10 extension

map11<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Object>>>>>>>>>>>, provided by the MapMonad11 extension

map12<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Object>>>>>>>>>>>>, provided by the MapMonad12 extension

map13<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Object>>>>>>>>>>>>>, provided by the MapMonad13 extension

map14<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Object>>>>>>>>>>>>>>, provided by the MapMonad14 extension

map15<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Object>>>>>>>>>>>>>>>, provided by the MapMonad15 extension

map16<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Object>>>>>>>>>>>>>>>>, provided by the MapMonad16 extension

map17<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Object>>>>>>>>>>>>>>>>>, provided by the MapMonad17 extension

map18<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Object>>>>>>>>>>>>>>>>>>, provided by the MapMonad18 extension

map2<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Object>>, provided by the MapMonad2 extension

map3<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Object>>>, provided by the MapMonad3 extension

map4<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Object>>>>, provided by the MapMonad4 extension

map5<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Object>>>>>, provided by the MapMonad5 extension

map6<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Monad<Object>>>>>>, provided by the MapMonad6 extension

map7<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Monad<Monad<Object>>>>>>>, provided by the MapMonad7 extension

map8<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Object>>>>>>>>, provided by the MapMonad8 extension

map9<R extends Object>(R mapper(T)) → TReduced<Object>

Available on Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Monad<Object>>>>>>>>>, provided by the MapMonad9 extension

mapErr(Err<T> noFuturesAllowed(Err<T> err)) → Err<T>
Transforms the inner Err instance if this is an Err.
override
mapOk(Ok<T> noFuturesAllowed(Ok<T> ok)) → Err<T>
Transforms the inner Ok instance if this is an Ok.
override
matchError<E extends Object>() → Option<E>
Returns an Option containing the error if its type matches E.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
ok() → None<Ok<T>>
Safely gets the Ok instance. Returns a Some on Ok, or a None on Err.
override
okOr(Result<T> other) → Result<T>
Returns this if it's Ok, otherwise returns the other Result.
override
orNull() → T?
Returns the contained Ok value or null.
override
reduce<R extends Object>() → Resolvable<Option<R>>
Reduces the monad to a Resolvable of an Option of type R.
inherited
swap() → Async<Err<T>>

Available on Err<Async<T>>, provided by the ErrAsyncSwapX extension

swap() → None<Err<T>>

Available on Err<None<T>>, provided by the ErrNoneSwapX extension

swap() → Sync<Result<T>>

Available on Result<Sync<T>>, provided by the ResultSyncSwapX extension

swap() → Some<Result<T>>

Available on Result<Some<T>>, provided by the ResultSomeSwapX extension

swap() → Ok<Err<T>>

Available on Err<Ok<T>>, provided by the ErrOkSwapX extension

swap() → Resolvable<Result<T>>

Available on Result<Resolvable<T>>, provided by the ResultResolvableSwapX extension

swap() → Option<Err<T>>

Available on Err<Option<T>>, provided by the ErrOptionSwapX extension

swap() → Resolvable<Err<T>>

Available on Err<Resolvable<T>>, provided by the ErrResolvableSwapX extension

swap() → Result<Err<T>>

Available on Err<Result<T>>, provided by the ErrResultSwapX extension

swap() → Ok<Result<T>>

Available on Result<Ok<T>>, provided by the ResultOkSwapX extension

swap() → Sync<Err<T>>

Available on Err<Sync<T>>, provided by the ErrSyncSwapX extension

swap() → Option<Result<T>>

Available on Result<None<T>>, provided by the ResultNoneSwapX extension

swap() → Option<Result<T>>

Available on Result<Option<T>>, provided by the ResultOptionSwapX extension

swap() → Result<T>

Available on Result<Err<T>>, provided by the ResultErrSwapX extension

swap() → Async<Result<T>>

Available on Result<Async<T>>, provided by the ResultAsyncSwapX extension

swap() → Some<Err<T>>

Available on Err<Some<T>>, provided by the ErrSomeSwapX extension

toJson() → Map<String, dynamic>
Converts this Err to a JSON map.
toModel() → ErrModel
Converts this Err to a data model for serialization.
toString() → String
A string representation of this object.
override
toUnit() → Result<Unit>

Available on Result<Object>, provided by the ToUnitOnObjectResult extension

toUnit() → Err<Unit>

Available on Err<Object>, provided by the ToUnitOnObjectErr extension

toUnit() → Monad<Unit>

Available on Monad<Object>, provided by the ToUnitOnObjectMonad extension

transf<R extends Object>([R noFuturesAllowed(T e)?]) → Err<R>
Transforms the Monad's generic type from T to R.
override
transfErr<R extends Object>() → Err<R>
Transforms the Err's generic type from T to R while preserving the contained error.
unwrap() → T
Unsafely returns the contained value. Throws Err the Monad is an Err or None.
override
unwrapOr(T fallback) → T
Returns the contained value, or the fallback if the Monad is in an Err or None state.
override
wrapAsync() → Async<Err<T>>
Wraps this Monad in an Async.
override
wrapOk() → Ok<Err<T>>
Wraps this Monad in an Ok.
override
wrapResolvable() → Resolvable<Err<T>>
Wraps this Monad in a Resolvable.
override
wrapSome() → Some<Err<T>>
Wraps this Monad in a Some.
override
wrapSync() → Sync<Err<T>>
Wraps this Monad in a Sync.
override

Operators

operator ==(Object other) → bool
The equality operator.
inherited