| 'use strict'; |
| |
| var GetIntrinsic = require('get-intrinsic'); |
| |
| var $TypeError = GetIntrinsic('%TypeError%'); |
| |
| var regexExec = require('call-bind/callBound')('RegExp.prototype.exec'); |
| |
| var Call = require('./Call'); |
| var Get = require('./Get'); |
| var IsCallable = require('./IsCallable'); |
| var Type = require('./Type'); |
| |
| // https://ecma-international.org/ecma-262/6.0/#sec-regexpexec |
| |
| module.exports = function RegExpExec(R, S) { |
| if (Type(R) !== 'Object') { |
| throw new $TypeError('Assertion failed: `R` must be an Object'); |
| } |
| if (Type(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 || Type(result) === 'Object') { |
| return result; |
| } |
| throw new $TypeError('"exec" method must return `null` or an Object'); |
| } |
| return regexExec(R, S); |
| }; |