71 lines
1.9 KiB
JavaScript
71 lines
1.9 KiB
JavaScript
'use strict';
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var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
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var last = function last(array) {
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return array[array.length - 1];
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};
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var brackets = {
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/**
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* Parse string to nodes tree
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*/
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parse: function parse(str) {
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var current = [''];
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var stack = [current];
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for (var i = 0; i < str.length; i++) {
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var sym = str[i];
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if (sym === '(') {
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current = [''];
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last(stack).push(current);
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stack.push(current);
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continue;
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}
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if (sym === ')') {
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stack.pop();
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current = last(stack);
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current.push('');
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continue;
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}
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current[current.length - 1] += sym;
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}
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return stack[0];
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},
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/**
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* Generate output string by nodes tree
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*/
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stringify: function stringify(ast) {
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var result = '';
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for (var _iterator = ast, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
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var _ref;
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if (_isArray) {
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if (_i >= _iterator.length) break;
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_ref = _iterator[_i++];
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} else {
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_i = _iterator.next();
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if (_i.done) break;
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_ref = _i.value;
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}
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var i = _ref;
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if ((typeof i === 'undefined' ? 'undefined' : _typeof(i)) === 'object') {
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result += '(' + brackets.stringify(i) + ')';
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continue;
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}
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result += i;
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}
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return result;
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}
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};
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module.exports = brackets; |