Result<R, S> class

Result class that can either contain a value on success, or an error on failure

Annotations

• @immutable

Constructors

Result.err(S error)

Create a Result with an error

const

Result.ok([R? _value])

Create a result with a value

const

Properties

error → S

Get the error from this Result. This will throw error if this Result has a value instead. Check isError before accessing this.

no setter

hashCode → int

The hash code for this object.

no setter, override

isError → bool

Check if this Result contains an error

no setter

isNotError → bool

Opposite of isError

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

value → R

Get the value from this Result. This will throw error if this Result is an error. Check isError before accessing this.

no setter

Methods

flatMap<U>(Result<U, S> f(R)) → Result<U, S>

The flatMap function allows chaining of operations that return a Result. If this Result is value, it applies f to the value inside. If this Result is error, it returns the error.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

override

Static Methods

fromAsyncCallback<R, S>(Future<R> future(), {required S error(dynamic e, StackTrace s)}) → Future<Result<R, S>>

Create a Result from a callback that returns a Future.

fromFuture<R, S>(Future<R> future, {required S error(dynamic e, StackTrace s)}) → Future<Result<R, S>>

Create a Result from a Future.