| "use strict"; |
| /** |
| * Copyright 2023 Google LLC. |
| * Copyright (c) Microsoft Corporation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| Object.defineProperty(exports, "__esModule", { value: true }); |
| exports.DefaultMap = void 0; |
| /** |
| * A subclass of Map whose functionality is almost the same as its parent |
| * except for the fact that DefaultMap never returns undefined. It provides a |
| * default value for keys that do not exist. |
| */ |
| class DefaultMap extends Map { |
| /** The default value to return whenever a key is not present in the map. */ |
| #getDefaultValue; |
| constructor(getDefaultValue, entries) { |
| super(entries); |
| this.#getDefaultValue = getDefaultValue; |
| } |
| get(key) { |
| if (!this.has(key)) { |
| this.set(key, this.#getDefaultValue(key)); |
| } |
| return super.get(key); |
| } |
| } |
| exports.DefaultMap = DefaultMap; |
| //# sourceMappingURL=DefaultMap.js.map |
