Add Disposable and DisposableList

src/lang/Disposable.ts

@@ -0,0 +1,24 @@
+import IDisposable from "./IDisposable";
+
+export default class Disposable implements IDisposable {
+  private readonly _cleanup: () => void;
+  private _isDisposed: boolean;
+
+  constructor(cleanup: () => void) {
+    this._cleanup = cleanup;
+    this._isDisposed = false;
+  }
+
+  get isDisposed() {
+    return this._isDisposed;
+  }
+
+  public dispose(): void {
+    if (this._isDisposed) {
+      return;
+    }
+
+    this._cleanup();
+    this._isDisposed = true;
+  }
+}

src/lang/DisposableList.ts

@@ -0,0 +1,21 @@
+import IDisposable from "./IDisposable";
+
+export default class DisposableList implements IDisposable {
+  private readonly _list: IDisposable[];
+
+  constructor() {
+    this._list = [];
+  }
+
+  public add(disposable: IDisposable): void {
+    this._list.push(disposable);
+  }
+
+  public dispose(): void {
+    while (this._list.length) {
+      const disposable = this._list.shift();
+
+      disposable.dispose();
+    }
+  }
+}

src/lang/IDisposable.ts

@@ -0,0 +1,3 @@
+export default interface IDisposable {
+  dispose(): void;
+}