Last change
on this file since ceaed42 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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Property mode
set to
100644
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File size:
2.3 KB
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[6a3a178] | 1 | "use strict";
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| 2 |
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| 3 | function _createForOfIteratorHelperLoose(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; return function () { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } it = o[Symbol.iterator](); return it.next.bind(it); }
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| 4 |
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| 5 | function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
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| 6 |
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| 7 | function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
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| 8 |
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| 9 | function last(array) {
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| 10 | return array[array.length - 1];
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| 11 | }
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| 12 |
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| 13 | var brackets = {
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| 14 | /**
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| 15 | * Parse string to nodes tree
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| 16 | */
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| 17 | parse: function parse(str) {
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| 18 | var current = [''];
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| 19 | var stack = [current];
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| 20 |
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| 21 | for (var _iterator = _createForOfIteratorHelperLoose(str), _step; !(_step = _iterator()).done;) {
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| 22 | var sym = _step.value;
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| 23 |
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| 24 | if (sym === '(') {
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| 25 | current = [''];
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| 26 | last(stack).push(current);
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| 27 | stack.push(current);
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| 28 | continue;
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| 29 | }
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| 30 |
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| 31 | if (sym === ')') {
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| 32 | stack.pop();
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| 33 | current = last(stack);
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| 34 | current.push('');
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| 35 | continue;
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| 36 | }
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| 37 |
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| 38 | current[current.length - 1] += sym;
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| 39 | }
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| 40 |
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| 41 | return stack[0];
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| 42 | },
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| 43 |
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| 44 | /**
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| 45 | * Generate output string by nodes tree
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| 46 | */
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| 47 | stringify: function stringify(ast) {
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| 48 | var result = '';
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| 49 |
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| 50 | for (var _iterator2 = _createForOfIteratorHelperLoose(ast), _step2; !(_step2 = _iterator2()).done;) {
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| 51 | var i = _step2.value;
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| 52 |
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| 53 | if (typeof i === 'object') {
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| 54 | result += "(" + brackets.stringify(i) + ")";
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| 55 | continue;
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| 56 | }
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| 57 |
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| 58 | result += i;
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| 59 | }
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| 60 |
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| 61 | return result;
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| 62 | }
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| 63 | };
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| 64 | module.exports = brackets; |
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