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| "use strict";
|
| Object.defineProperty(exports, "__esModule", {
| value: true
| });
| exports.default = traverse;
|
| var _definitions = require("../definitions");
|
| function traverse(node, handlers, state) {
| if (typeof handlers === "function") {
| handlers = {
| enter: handlers
| };
| }
|
| const {
| enter,
| exit
| } = handlers;
| traverseSimpleImpl(node, enter, exit, state, []);
| }
|
| function traverseSimpleImpl(node, enter, exit, state, ancestors) {
| const keys = _definitions.VISITOR_KEYS[node.type];
| if (!keys) return;
| if (enter) enter(node, ancestors, state);
|
| for (const key of keys) {
| const subNode = node[key];
|
| if (Array.isArray(subNode)) {
| for (let i = 0; i < subNode.length; i++) {
| const child = subNode[i];
| if (!child) continue;
| ancestors.push({
| node,
| key,
| index: i
| });
| traverseSimpleImpl(child, enter, exit, state, ancestors);
| ancestors.pop();
| }
| } else if (subNode) {
| ancestors.push({
| node,
| key
| });
| traverseSimpleImpl(subNode, enter, exit, state, ancestors);
| ancestors.pop();
| }
| }
|
| if (exit) exit(node, ancestors, state);
| }
|
|
