this repo has no description
noway.gabb.fr
1"use strict";
2Object.defineProperty(exports, "__esModule", { value: true });
3exports.RewindableValue = void 0;
4const clone_1 = require("./clone");
5/* eslint-disable no-underscore-dangle */
6/**
7 * A lightweight wrapper around a primitive value which allows its state
8 * to saved and later restored.
9 */
10class RewindableValue {
11 /**
12 * Create a rewindable value.
13 *
14 * @param initialValue - The initial value for the new instance.
15 */
16 constructor(initialValue) {
17 this._values = [initialValue];
18 }
19 /**
20 * Returns the current value of this instance.
21 */
22 get() {
23 return this._values[this._values.length - 1];
24 }
25 /**
26 * Replace the current value of this instance.
27 *
28 * @param newValue - The value to assign this instance.
29 */
30 set(newValue) {
31 this._values[this._values.length - 1] = newValue;
32 }
33 /**
34 * Save the current state of this value.
35 *
36 * Calls to this method should be balanced by calls to `restore`.
37 */
38 save() {
39 this._values.push(this._values[this._values.length - 1]);
40 }
41 /**
42 * Restore a previously saved value.
43 */
44 restore() {
45 if (this._values.length === 1) {
46 throw new RangeError("Calls to restore must balance previous calls to save");
47 }
48 this._values.pop();
49 }
50 // section Cloneable
51 clone() {
52 const copy = (0, clone_1.shallowCloneOf)(this);
53 copy._values = this._values.slice();
54 return copy;
55 }
56}
57exports.RewindableValue = RewindableValue;
58//# sourceMappingURL=rewindable-value.js.map