62 lines
1.4 KiB
Plaintext
62 lines
1.4 KiB
Plaintext
/**
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* @typedef { import('estree').Node} Node
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* @typedef {{
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* skip: () => void;
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* remove: () => void;
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* replace: (node: Node) => void;
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* }} WalkerContext
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*/
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export class WalkerBase {
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constructor() {
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/** @type {boolean} */
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this.should_skip = false;
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/** @type {boolean} */
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this.should_remove = false;
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/** @type {Node | null} */
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this.replacement = null;
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/** @type {WalkerContext} */
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this.context = {
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skip: () => (this.should_skip = true),
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remove: () => (this.should_remove = true),
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replace: (node) => (this.replacement = node)
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};
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}
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/**
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* @template {Node} Parent
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* @param {Parent | null | undefined} parent
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* @param {keyof Parent | null | undefined} prop
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* @param {number | null | undefined} index
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* @param {Node} node
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*/
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replace(parent, prop, index, node) {
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if (parent && prop) {
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if (index != null) {
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/** @type {Array<Node>} */ (parent[prop])[index] = node;
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} else {
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/** @type {Node} */ (parent[prop]) = node;
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}
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}
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}
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/**
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* @template {Node} Parent
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* @param {Parent | null | undefined} parent
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* @param {keyof Parent | null | undefined} prop
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* @param {number | null | undefined} index
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*/
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remove(parent, prop, index) {
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if (parent && prop) {
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if (index !== null && index !== undefined) {
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/** @type {Array<Node>} */ (parent[prop]).splice(index, 1);
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} else {
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delete parent[prop];
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}
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}
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}
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}
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