Sha256: 4cc0861d7179740f1e142b3bd66fa84cb9e616d6f81f3672355452b75ffa1572
Contents?: true
Size: 1.81 KB
Versions: 81
Compression:
Stored size: 1.81 KB
Contents
'use strict';
var GetIntrinsic = require('get-intrinsic');
var $SyntaxError = GetIntrinsic('%SyntaxError%');
var $TypeError = GetIntrinsic('%TypeError%');
var $Promise = GetIntrinsic('%Promise%', true);
var Call = require('./Call');
var CompletionRecord = require('./CompletionRecord');
var GetMethod = require('./GetMethod');
var Type = require('./Type');
var assertRecord = require('../helpers/assertRecord');
var callBound = require('call-bind/callBound');
var $then = callBound('Promise.prototype.then', true);
// https://262.ecma-international.org/12.0/#sec-asynciteratorclose
module.exports = function AsyncIteratorClose(iteratorRecord, completion) {
assertRecord(Type, 'Iterator Record', 'iteratorRecord', iteratorRecord); // step 1
if (!(completion instanceof CompletionRecord)) {
throw new $TypeError('Assertion failed: completion is not a Completion Record instance'); // step 2
}
if (!$then) {
throw new $SyntaxError('This environment does not support Promises.');
}
var iterator = iteratorRecord['[[Iterator]]']; // step 3
return $then(
$then(
$then(
new $Promise(function (resolve) {
resolve(GetMethod(iterator, 'return')); // step 4
// resolve(Call(ret, iterator, [])); // step 6
}),
function (returnV) { // step 5.a
if (typeof returnV === 'undefined') {
return completion; // step 5.b
}
return Call(returnV, iterator); // step 5.c, 5.d.
}
),
null,
function (e) {
if (completion.type() === 'throw') {
completion['?'](); // step 6
} else {
throw e; // step 7
}
}
),
function (innerResult) { // step 8
if (completion.type() === 'throw') {
completion['?'](); // step 6
}
if (Type(innerResult) !== 'Object') {
throw new $TypeError('`innerResult` must be an Object'); // step 10
}
return completion;
}
);
};
Version data entries
81 entries across 27 versions & 2 rubygems