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32 lines
827 B
32 lines
827 B
'use strict';
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var $TypeError = require('es-errors/type');
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var regexExec = require('call-bound')('RegExp.prototype.exec');
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var Call = require('./Call');
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var Get = require('./Get');
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var IsCallable = require('./IsCallable');
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var isObject = require('../helpers/isObject');
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// https://262.ecma-international.org/6.0/#sec-regexpexec
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module.exports = function RegExpExec(R, S) {
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if (!isObject(R)) {
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throw new $TypeError('Assertion failed: `R` must be an Object');
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}
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if (typeof S !== 'string') {
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throw new $TypeError('Assertion failed: `S` must be a String');
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}
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var exec = Get(R, 'exec');
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if (IsCallable(exec)) {
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var result = Call(exec, R, [S]);
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if (result === null || isObject(result)) {
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return result;
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}
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throw new $TypeError('"exec" method must return `null` or an Object');
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}
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return regexExec(R, S);
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};
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