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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| import { Container } from '@/base/index'; | ||
|
|
||
| /** | ||
| * @description The iterator type including `NORMAL` and `REVERSE`. | ||
| */ | ||
| export const enum ITERATOR_TYPE { | ||
| NORMAL = 0, | ||
| REVERSE = 1 | ||
| } | ||
|
|
||
| export abstract class Iterator<T> { | ||
| /** | ||
| * @description The container pointed to by the iterator. | ||
| */ | ||
| abstract readonly container: Container<T>; | ||
| /** | ||
| * @internal | ||
| */ | ||
| abstract _node: unknown; | ||
| /** | ||
| * @description Iterator's type. | ||
| * @example | ||
| * console.log(container.end().type === ITERATOR_TYPE.NORMAL); // true | ||
| */ | ||
| readonly type: ITERATOR_TYPE; | ||
| /** | ||
| * @internal | ||
| */ | ||
| protected constructor(props: { | ||
| type?: ITERATOR_TYPE | ||
| } = {}) { | ||
| const { type = ITERATOR_TYPE.NORMAL } = props; | ||
| this.type = type; | ||
| } | ||
| /** | ||
| * @param iter - The other iterator you want to compare. | ||
| * @returns Whether this equals to obj. | ||
| * @example | ||
| * container.find(1).equals(container.end()); | ||
| */ | ||
| equals(iter: Iterator<T>) { | ||
| return this._node === iter._node; | ||
| } | ||
| /** | ||
| * @description Pointers to item. | ||
| * @returns The value of the pointer's item. | ||
| * @example | ||
| * const val = container.begin().pointer; | ||
| */ | ||
| abstract get pointer(): T; | ||
| /** | ||
| * @description Set pointer's value (some containers are unavailable). | ||
| * @param newValue - The new value you want to set. | ||
| * @example | ||
| * (<LinkList<number>>container).begin().pointer = 1; | ||
| */ | ||
| abstract set pointer(newValue: T); | ||
| /** | ||
| * @description Move `this` iterator to pre. | ||
| * @returns The iterator's self. | ||
| * @example | ||
| * const iter = container.find(1); // container = [0, 1] | ||
| * const pre = iter.pre(); | ||
| * console.log(pre === iter); // true | ||
| * console.log(pre.equals(iter)); // true | ||
| * console.log(pre.pointer, iter.pointer); // 0, 0 | ||
| */ | ||
| abstract pre(): this; | ||
| /** | ||
| * @description Move `this` iterator to next. | ||
| * @returns The iterator's self. | ||
| * @example | ||
| * const iter = container.find(1); // container = [1, 2] | ||
| * const next = iter.next(); | ||
| * console.log(next === iter); // true | ||
| * console.log(next.equals(iter)); // true | ||
| * console.log(next.pointer, iter.pointer); // 2, 2 | ||
| */ | ||
| abstract next(): this; | ||
| /** | ||
| * @description Get a copy of itself. | ||
| * @returns The copy of self. | ||
| * @example | ||
| * const iter = container.find(1); // container = [1, 2] | ||
| * const next = iter.copy().next(); | ||
| * console.log(next === iter); // false | ||
| * console.log(next.equals(iter)); // false | ||
| * console.log(next.pointer, iter.pointer); // 2, 1 | ||
| */ | ||
| abstract copy(): Iterator<T>; | ||
| } |
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