[add] slot1

src/CatanEngine/CoroutineV2/CancellationTokenSource.ts

@@ -0,0 +1,43 @@
+const CANCEL = Symbol();
+
+export interface CancellationToken {
+    readonly IsCancellationRequested: boolean;
+    ThrowIfCancellationRequested(): void;
+}
+
+export class CancellationTokenSource {
+    readonly Token: CancellationToken;
+
+    constructor() {
+        this.Token = new CancellationTokenImpl();
+    }
+
+    Cancel() {
+        this.Token[CANCEL]();
+    }
+}
+
+export class TaskCancelledException extends Error {
+    constructor() {
+        super("Task Cancelled");
+        Reflect.setPrototypeOf(this, TaskCancelledException.prototype);
+    }
+}
+
+class CancellationTokenImpl implements CancellationToken {
+    IsCancellationRequested: boolean;
+
+    constructor() {
+        this.IsCancellationRequested = false;
+    }
+
+    ThrowIfCancellationRequested() {
+        if (this.IsCancellationRequested) {
+            throw new TaskCancelledException();
+        }
+    }
+
+    [CANCEL]() {
+        this.IsCancellationRequested = true;
+    }
+}