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- 'use strict';
- var GetIntrinsic = require('get-intrinsic');
- var $TypeError = GetIntrinsic('%TypeError%');
- var substring = require('./substring');
- var Type = require('./Type');
- var assertRecord = require('../helpers/assertRecord');
- // https://ecma-international.org/ecma-262/13.0/#sec-getmatchstring
- module.exports = function GetMatchString(S, match) {
- if (Type(S) !== 'String') {
- throw new $TypeError('Assertion failed: `S` must be a String');
- }
- assertRecord(Type, 'Match Record', 'match', match);
- if (!(match['[[StartIndex]]'] <= S.length)) {
- throw new $TypeError('`match` [[StartIndex]] must be a non-negative integer <= the length of S');
- }
- if (!(match['[[EndIndex]]'] <= S.length)) {
- throw new $TypeError('`match` [[EndIndex]] must be an integer between [[StartIndex]] and the length of S, inclusive');
- }
- return substring(S, match['[[StartIndex]]'], match['[[EndIndex]]']);
- };
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