forked from lix-project/lix-website
27 lines
884 B
JavaScript
27 lines
884 B
JavaScript
'use strict';
|
|
|
|
var $TypeError = require('es-errors/type');
|
|
|
|
var substring = require('./substring');
|
|
|
|
var isMatchRecord = require('../helpers/records/match-record');
|
|
|
|
// https://262.ecma-international.org/13.0/#sec-getmatchstring
|
|
|
|
module.exports = function GetMatchString(S, match) {
|
|
if (typeof S !== 'string') {
|
|
throw new $TypeError('Assertion failed: `S` must be a String');
|
|
}
|
|
if (!isMatchRecord(match)) {
|
|
throw new $TypeError('Assertion failed: `match` must be a Match Record');
|
|
}
|
|
|
|
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]]']);
|
|
};
|