RegExpExec.jsā¢830 B
'use strict';
var $TypeError = require('es-errors/type');
var isObject = require('es-object-atoms/isObject');
var regexExec = require('call-bound')('RegExp.prototype.exec');
var Call = require('./Call');
var Get = require('./Get');
var IsCallable = require('./IsCallable');
// https://262.ecma-international.org/6.0/#sec-regexpexec
module.exports = function RegExpExec(R, S) {
if (!isObject(R)) {
throw new $TypeError('Assertion failed: `R` must be an Object');
}
if (typeof S !== 'string') {
throw new $TypeError('Assertion failed: `S` must be a String');
}
var exec = Get(R, 'exec');
if (IsCallable(exec)) {
var result = Call(exec, R, [S]);
if (result === null || isObject(result)) {
return result;
}
throw new $TypeError('"exec" method must return `null` or an Object');
}
return regexExec(R, S);
};