| 'use strict'; |
| |
| var classof = require('./_classof'); |
| var builtinExec = RegExp.prototype.exec; |
| |
| // `RegExpExec` abstract operation |
| // https://tc39.github.io/ecma262/#sec-regexpexec |
| module.exports = function (R, S) { |
| var exec = R.exec; |
| if (typeof exec === 'function') { |
| var result = exec.call(R, S); |
| if (typeof result !== 'object') { |
| throw new TypeError('RegExp exec method returned something other than an Object or null'); |
| } |
| return result; |
| } |
| if (classof(R) !== 'RegExp') { |
| throw new TypeError('RegExp#exec called on incompatible receiver'); |
| } |
| return builtinExec.call(R, S); |
| }; |