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//// [recursiveArrayNotCircular.ts]
type Action<T, P> = P extends void ? { type : T } : { type: T, payload: P }
enum ActionType {
Foo,
Bar,
Baz,
Batch
}
type ReducerAction =
| Action<ActionType.Bar, number>
| Action<ActionType.Baz, boolean>
| Action<ActionType.Foo, string>
| Action<ActionType.Batch, ReducerAction[]>
function assertNever(a: never): never {
throw new Error("Unreachable!");
}
function reducer(action: ReducerAction): void {
switch(action.type) {
case ActionType.Bar:
const x: number = action.payload;
break;
case ActionType.Baz:
const y: boolean = action.payload;
break;
case ActionType.Foo:
const z: string = action.payload;
break;
case ActionType.Batch:
action.payload.map(reducer);
break;
default: return assertNever(action);
}
}
//// [recursiveArrayNotCircular.js]
var ActionType;
(function (ActionType) {
ActionType[ActionType["Foo"] = 0] = "Foo";
ActionType[ActionType["Bar"] = 1] = "Bar";
ActionType[ActionType["Baz"] = 2] = "Baz";
ActionType[ActionType["Batch"] = 3] = "Batch";
})(ActionType || (ActionType = {}));
function assertNever(a) {
throw new Error("Unreachable!");
}
function reducer(action) {
switch (action.type) {
case ActionType.Bar:
var x = action.payload;
break;
case ActionType.Baz:
var y = action.payload;
break;
case ActionType.Foo:
var z = action.payload;
break;
case ActionType.Batch:
action.payload.map(reducer);
break;
default: return assertNever(action);
}
}
|
