Action

Base class for all actions. Extend this to create type-safe actions with pattern matching.

Example:

// Define your actions as a sealed hierarchy in YOUR code
sealed class CounterAction extends Action {}
final class Increment extends CounterAction {}
final class Decrement extends CounterAction {}
final class SetValue extends CounterAction {
const SetValue(this.value);
final int value;
}
final class Reset extends CounterAction {}
// Reducer uses exhaustive pattern matching - no strings!
int counterReducer(int state, Action action) => switch (action) {
Increment() => state + 1,
Decrement() => state - 1,
SetValue(:final value) => value,
Reset() => 0,
_ => state, // Handle system actions
};