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// 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: [generators, 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"');
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