Err<T extends Object, E extends Object> class

A type that represent a err TaskResult.

Inheritance

• Object
• TaskResult<T, E>
• Err

Constructors

Err(E error)

Creates an err result with given error.

const

Properties

data → T?

Returns the data of the result, this value will not be null if isOk is true.

no setter, inherited

error → E?

Returns the error of the result, this value will not be null if isErr is true.

no setter, inherited

hashCode → int

The hash code for this object.

no setter, inherited

isErr → bool

Returns true if the result is err, which means error is not null.

no setter, inherited

isOk → bool

Returns true if the result is ok, which means data is not null.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

and<U extends Object>(TaskResult<U, E> res) → TaskResult<U, E>

Returns res if ok, otherwise returns error in corresponding type.

inherited

andThen<U extends Object>(TaskResult<U, E> op(T data)) → TaskResult<U, E>

Returns the result computed by op, otherwise returns error in corresponding type.

inherited

andThenAsync<U extends Object>(FutureOr<TaskResult<U, E>> op(T data)) → Future<TaskResult<U, E>>

This is the async version of andThen.

inherited

expect(Object msg) → T

Unwraps the result, returns data if ok, otherwise throws given msg.

inherited

expectErr(Object msg) → E

Unwraps the result, returns error if err, otherwise throws given msg.

inherited

inspect(void op(T data)) → TaskResult<T, E>

Calls given op if ok and returns the result as is.

inherited

inspectAsync(FutureOr<void> op(T data)) → Future<TaskResult<T, E>>

This is the async version of inspect.

inherited

inspectErr(void op(E error)) → TaskResult<T, E>

Calls given op if err and returns the result as is.

inherited

inspectErrAsync(FutureOr<void> op(E error)) → Future<TaskResult<T, E>>

This is the async version of inspectErr.

inherited

map<U extends Object>(U op(T data)) → TaskResult<U, E>

Maps the result to result with data computed by given op.

inherited

mapAsync<U extends Object>(FutureOr<U> op(T data)) → Future<TaskResult<U, E>>

This is the async version of map.

inherited

mapErr<F extends Object>(F op(E error)) → TaskResult<T, F>

Maps the result to result with target error computed by given op.

inherited

mapErrAsync<F extends Object>(FutureOr<F> op(E error)) → Future<TaskResult<T, F>>

This is the async version of mapOrElse.

inherited

mapOr<U extends Object>(U defaultValue, U op(T data)) → TaskResult<U, E>

Maps the result to result with data computed by given defaultValue value and op.

inherited

mapOrAsync<U extends Object>(U defaultValue, FutureOr<U> op(T data)) → Future<TaskResult<U, E>>

This is the async version of mapOr.

inherited

mapOrElse<U extends Object>(U defaultValue(E error), U op(T data)) → TaskResult<U, E>

Maps the result to result with data computed by given defaultValue and op.

inherited

mapOrElseAsync<U extends Object>(FutureOr<U> defaultValue(E error), FutureOr<U> op(T data)) → Future<TaskResult<U, E>>

This is the async version of mapOrElse.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

or<F extends Object>(TaskResult<T, F> res) → TaskResult<T, F>

Returns res if err, otherwise returns data in corresponding type.

inherited

orElse<F extends Object>(TaskResult<T, F> op(E error)) → TaskResult<T, F>

Returns the result computed by op, otherwise returns data in corresponding type.

inherited

orElseAsync<F extends Object>(FutureOr<TaskResult<T, F>> op(E error)) → Future<TaskResult<T, F>>

This is the async version of orElse.

inherited

toString() → String

A string representation of this object.

inherited

unwrap() → T

Unwraps the result, returns data if ok, otherwise throws error.

inherited

unwrapErr() → E

Unwraps the result, returns error if err, otherwise throws data.

inherited

unwrapOr(T defaultValue) → T

Unwraps the result, returns data if ok, otherwise returns given defaultValue.

inherited

unwrapOrElse(T op(E error)) → T

Unwraps the result, returns data if ok, otherwise computes it from given op.

inherited

unwrapOrElseAsync(FutureOr<T> op(E error)) → Future<T>

This is the async version of unwrapOrElse.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited