7820380e
 “wangming”
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// @ts-check
/** @typedef { import('estree').BaseNode} BaseNode */
/** @typedef {{
skip: () => void;
remove: () => void;
replace: (node: BaseNode) => void;
}} WalkerContext */
export class WalkerBase {
constructor() {
/** @type {boolean} */
this.should_skip = false;
/** @type {boolean} */
this.should_remove = false;
/** @type {BaseNode | null} */
this.replacement = null;
/** @type {WalkerContext} */
this.context = {
skip: () => (this.should_skip = true),
remove: () => (this.should_remove = true),
replace: (node) => (this.replacement = node)
};
}
/**
*
* @param {any} parent
* @param {string} prop
* @param {number} index
* @param {BaseNode} node
*/
replace(parent, prop, index, node) {
if (parent) {
if (index !== null) {
parent[prop][index] = node;
} else {
parent[prop] = node;
}
}
}
/**
*
* @param {any} parent
* @param {string} prop
* @param {number} index
*/
remove(parent, prop, index) {
if (parent) {
if (index !== null) {
parent[prop].splice(index, 1);
} else {
delete parent[prop];
}
}
}
}
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