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77 lines
2.0 KiB
77 lines
2.0 KiB
'use strict';
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var $TypeError = require('es-errors/type');
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var callBound = require('call-bound');
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var hasOwn = require('hasown');
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var isRegExpRecord = require('../helpers/records/regexp-record');
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var $charAt = callBound('String.prototype.charAt');
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// https://262.ecma-international.org/16.0/#sec-updatemodifiers
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module.exports = function UpdateModifiers(rer, add, remove) {
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if (!isRegExpRecord(rer)) {
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throw new $TypeError('Assertion failed: `rer` must be a RegExp Record');
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}
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if (typeof add !== 'string') {
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throw new $TypeError('Assertion failed: `add` must be a string');
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}
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if (typeof remove !== 'string') {
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throw new $TypeError('Assertion failed: `remove` must be a string');
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}
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// 1. Assert: add and remove have no elements in common.
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var adds = { __proto__: null };
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var removes = { __proto__: null };
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for (var i = 0; i < add.length; i++) {
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var toAdd = $charAt(add, i);
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adds[toAdd] = true;
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}
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for (var j = 0; j < remove.length; j++) {
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var toRemove = $charAt(remove, j);
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if (hasOwn(adds, toRemove)) {
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throw new $TypeError('Assertion failed: `add` and `remove` have elements in common');
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}
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removes[toRemove] = true;
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}
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var ignoreCase = rer['[[IgnoreCase]]']; // step 2
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var multiline = rer['[[Multiline]]']; // step 3
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var dotAll = rer['[[DotAll]]']; // step 4
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var unicode = rer['[[Unicode]]']; // step 5
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var unicodeSets = rer['[[UnicodeSets]]']; // step 6
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var capturingGroupsCount = rer['[[CapturingGroupsCount]]']; // step 7
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if (hasOwn(removes, 'i')) {
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ignoreCase = false; // step 8
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} else if (hasOwn(adds, 'i')) {
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ignoreCase = true; // step 9
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}
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if (hasOwn(removes, 'm')) {
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multiline = false; // step 10
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} else if (hasOwn(adds, 'm')) {
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multiline = true; // step 11
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}
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if (hasOwn(removes, 's')) {
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dotAll = false; // step 12
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} else if (hasOwn(adds, 's')) {
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dotAll = true; // step 13
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}
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return {
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'[[IgnoreCase]]': !!ignoreCase,
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'[[Multiline]]': !!multiline,
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'[[DotAll]]': !!dotAll,
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'[[Unicode]]': !!unicode,
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'[[UnicodeSets]]': !!unicodeSets,
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'[[CapturingGroupsCount]]': capturingGroupsCount
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}; // step 14
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};
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