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53 lines
1.3 KiB
JavaScript
53 lines
1.3 KiB
JavaScript
var parse = require('acorn').parse;
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module.exports = function (src, opts) {
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if (!opts) opts = {}
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var ast = src;
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if (typeof src === 'string') {
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try {
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ast = parse(src, {
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ecmaVersion: opts.ecmaVersion || 8,
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allowReturnOutsideFunction: true
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})
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}
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catch (err) { ast = parse('(' + src + ')') }
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}
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return function (cb) {
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walk(ast, undefined, cb);
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};
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};
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function walk (node, parent, cb) {
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var keys = objectKeys(node);
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for (var i = 0; i < keys.length; i++) {
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var key = keys[i];
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if (key === 'parent') continue;
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var child = node[key];
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if (isArray(child)) {
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for (var j = 0; j < child.length; j++) {
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var c = child[j];
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if (c && typeof c.type === 'string') {
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c.parent = node;
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walk(c, node, cb);
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}
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}
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}
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else if (child && typeof child.type === 'string') {
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child.parent = node;
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walk(child, node, cb);
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}
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}
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cb(node);
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}
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var isArray = Array.isArray || function (xs) {
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return Object.prototype.toString.call(xs) === '[object Array]';
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};
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var objectKeys = Object.keys || function (obj) {
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var keys = [];
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for (var key in obj) keys.push(key);
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return keys;
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};
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