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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.
/*---
desc: >
IteratorClose is called when AssignmentRestEvaluation produces a "throw"
completion due to reference evaluation
info: |
ArrayAssignmentPattern :
[ AssignmentElementList , Elisionopt AssignmentRestElementopt ]
[...]
7. If AssignmentRestElement is present, then
a. Let status be the result of performing
IteratorDestructuringAssignmentEvaluation of AssignmentRestElement
with iteratorRecord as the argument.
8. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
status).
9. Return Completion(status).
7.4.6 IteratorClose( iterator, completion )
[...]
7. If completion.[[type]] is throw, return Completion(completion)
features: [Symbol.iterator]
template: error
es6id: 12.14.5.2
esid: sec-runtime-semantics-destructuringassignmentevaluation
---*/
//- setup
var nextCount = 0;
var returnCount = 0;
var x;
function ReturnError() {}
var iterable = {};
var iterator = {
next: function() {
nextCount += 1;
// Set an upper-bound to limit unnecessary iteration in non-conformant
// implementations
return { done: nextCount > 10 };
},
return: function() {
returnCount += 1;
// This value should be discarded.
throw new ReturnError();
}
};
var thrower = function() {
throw new Test262Error();
};
iterable[Symbol.iterator] = function() {
return iterator;
};
//- error
Test262Error
//- elems
[ x , ...{}[thrower()] ]
//- vals
iterable
//- teardown
assert.sameValue(nextCount, 1);
assert.sameValue(returnCount, 1);
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