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