AsyncState<T> class sealed

============================================================================ ASYNC STATE<T> - PURE DART ASYNC STATE REPRESENTATION

A sealed class representing the state of an async operation.

This is a pure Dart alternative to Flutter's AsyncSnapshot, enabling business logic to remain framework-agnostic.

Pattern Matching (Dart 3.0+)

final state = asyncSignal.state;
switch (state) {
  case AsyncLoading():
    return CircularProgressIndicator();
  case AsyncData(:final value):
    return Text('Data: $value');
  case AsyncError(:final error):
    return Text('Error: $error');
}
Implementers

Properties

dataOrNull → T?
The data value, or null if not in data state.
no setter
errorOrNull → Object?
The error, or null if not in error state.
no setter
hasData → bool
Whether this state has data.
no setter
hasError → bool
Whether this state has an error.
no setter
hashCode → int
The hash code for this object.
no setterinherited
isLoading → bool
Whether this state represents loading.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
stackTraceOrNull → StackTrace?
The stack trace, or null if not in error state.
no setter

Methods

maybeWhen<R>({R loading()?, R data(T value)?, R onError(Object error, StackTrace? stackTrace)?, required R orElse()}) → R
Maps this state with optional fallback for unhandled states.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited
when<R>({required R loading(), required R data(T value), required R onError(Object error, StackTrace? stackTrace)}) → R
Maps this state to a value using the provided callbacks.

Operators

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