Permalink
Cannot retrieve contributors at this time
62 lines (48 sloc)
2.14 KB
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
codeql-action/node_modules/es-abstract/2023/IteratorClose.js
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
'use strict'; | |
var GetIntrinsic = require('get-intrinsic'); | |
var $TypeError = GetIntrinsic('%TypeError%'); | |
var Call = require('./Call'); | |
var CompletionRecord = require('./CompletionRecord'); | |
var GetMethod = require('./GetMethod'); | |
var IsCallable = require('./IsCallable'); | |
var Type = require('./Type'); | |
var assertRecord = require('../helpers/assertRecord'); | |
// https://262.ecma-international.org/14.0/#sec-iteratorclose | |
module.exports = function IteratorClose(iteratorRecord, completion) { | |
assertRecord(Type, 'Iterator Record', 'iteratorRecord', iteratorRecord); | |
if (Type(iteratorRecord['[[Iterator]]']) !== 'Object') { | |
throw new $TypeError('Assertion failed: iteratorRecord.[[Iterator]] must be an Object'); // step 1 | |
} | |
if (!IsCallable(completion) && !(completion instanceof CompletionRecord)) { // step 2 | |
throw new $TypeError('Assertion failed: completion is not a thunk representing a Completion Record, nor a Completion Record instance'); | |
} | |
var completionThunk = completion instanceof CompletionRecord ? function () { return completion['?'](); } : completion; | |
var iterator = iteratorRecord['[[Iterator]]']; // step 3 | |
var iteratorReturn; | |
try { | |
iteratorReturn = GetMethod(iterator, 'return'); // step 4 | |
} catch (e) { | |
completionThunk(); // throws if `completion` is a throw completion // step 6 | |
completionThunk = null; // ensure it's not called twice. | |
throw e; // step 7 | |
} | |
if (typeof iteratorReturn === 'undefined') { | |
return completionThunk(); // step 5.a - 5.b | |
} | |
var innerResult; | |
try { | |
innerResult = Call(iteratorReturn, iterator, []); | |
} catch (e) { | |
// if we hit here, then "e" is the innerResult completion that needs re-throwing | |
completionThunk(); // throws if `completion` is a throw completion // step 6 | |
completionThunk = null; // ensure it's not called twice. | |
// if not, then return the innerResult completion | |
throw e; // step 7 | |
} | |
var completionRecord = completionThunk(); // if innerResult worked, then throw if the completion does | |
completionThunk = null; // ensure it's not called twice. | |
if (Type(innerResult) !== 'Object') { | |
throw new $TypeError('iterator .return must return an object'); | |
} | |
return completionRecord; | |
}; |