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Stored size: 1.68 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/9.0/#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 new $Promise(function (resolve) {
var ret = GetMethod(iterator, 'return'); // step 4
if (typeof ret === 'undefined') {
resolve(completion); // step 5
} else {
resolve($then(
new $Promise(function (resolve2) {
// process.exit(42);
resolve2(Call(ret, iterator, [])); // step 6
}),
function (innerResult) {
if (Type(innerResult) !== 'Object') {
throw new $TypeError('`innerResult` must be an Object'); // step 10
}
return completion;
},
function (e) {
if (completion.type() === 'throw') {
completion['?'](); // step 8
} else {
throw e; // step 9
}
}
));
}
});
};
Version data entries
81 entries across 27 versions & 2 rubygems