mirror of https://github.com/tc39/test262.git
72 lines
2.2 KiB
JavaScript
72 lines
2.2 KiB
JavaScript
|
// Copyright (C) 2016 the V8 project authors. All rights reserved.
|
||
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
||
|
|
/*---
|
||
|
|
esid: sec-generator-function-definitions-runtime-semantics-evaluation
|
||
|
|
es6id: 14.4.14
|
||
|
|
description: Value received from invocation of generator's `return` method
|
||
|
|
info: |
|
||
|
|
YieldExpression : yield * AssignmentExpression
|
||
|
|
|
||
|
|
1. Let exprRef be the result of evaluating AssignmentExpression.
|
||
|
|
2. Let value be ? GetValue(exprRef).
|
||
|
|
3. Let iterator be ? GetIterator(value).
|
||
|
|
4. Let received be NormalCompletion(undefined).
|
||
|
|
5. Repeat
|
||
|
|
a. If received.[[Type]] is normal, then
|
||
|
|
[...]
|
||
|
|
b. Else if received.[[Type]] is throw, then
|
||
|
|
[...]
|
||
|
|
c. Else,
|
||
|
|
i. Assert: received.[[Type]] is return.
|
||
|
|
ii. Let return be ? GetMethod(iterator, "return").
|
||
|
|
iii. If return is undefined, return Completion(received).
|
||
|
|
iv. Let innerReturnResult be ? Call(return, iterator, «
|
||
|
|
received.[[Value]] »).
|
||
|
|
v. If Type(innerReturnResult) is not Object, throw a TypeError
|
||
|
|
exception.
|
||
|
|
vi. Let done be ? IteratorComplete(innerReturnResult).
|
||
|
|
vii. If done is true, then
|
||
|
|
1. Let value be ? IteratorValue(innerReturnResult).
|
||
|
|
2. Return Completion{[[Type]]: return, [[Value]]: value,
|
||
|
|
[[Target]]: empty}.
|
||
|
|
viii. Let received be GeneratorYield(innerReturnResult).
|
||
|
|
|
||
|
|
features: [Symbol.iterator]
|
||
|
|
---*/
|
||
|
|
|
||
|
|
var quickIter = {};
|
||
|
|
var normalCompletion = false;
|
||
|
|
var errorCompletion = false;
|
||
|
|
var delegationComplete = false;
|
||
|
|
var iter, returnReceived;
|
||
|
|
quickIter[Symbol.iterator] = function() {
|
||
|
|
return {
|
||
|
|
next: function() {
|
||
|
|
return { done: false };
|
||
|
|
},
|
||
|
|
return: function(x) {
|
||
|
|
returnReceived = x;
|
||
|
|
return { done: true, value: 3333 };
|
||
|
|
}
|
||
|
|
};
|
||
|
|
};
|
||
|
|
function* g() {
|
||
|
|
try {
|
||
|
|
yield * quickIter;
|
||
|
|
normalCompletion = true;
|
||
|
|
} catch (e) {
|
||
|
|
errorCompletion = true;
|
||
|
|
} finally {
|
||
|
|
delegationComplete = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
iter = g();
|
||
|
|
|
||
|
|
iter.next();
|
||
|
|
iter.return(2222);
|
||
|
|
assert.sameValue(returnReceived, 2222);
|
||
|
|
assert.sameValue(delegationComplete, true, 'delegation complete');
|
||
|
|
assert.sameValue(normalCompletion, false, 'completion was abrupt');
|
||
|
|
assert.sameValue(errorCompletion, false, 'completion was not of type "throw"');
|