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The files in this patch are organized according to the following naming scheme: Prefix | Grammar production -------------------|------------------- `array-empty-` | ArrayAssignmentPattern : [ ] `array-elision-` | ArrayAssignmentPattern : [ Elision ] `array-rest-` | ArrayAssignmentPattern : [ Elisionopt AssignmentRestElement ] `array-elem-` | ArrayAssignmentPattern : [ AssignmentElementList ] `array-elem-trlg-` | ArrayAssignmentPattern : [ AssignmentElementList , Elisionopt AssignmentRestElementopt ] Suffix | Intent -------------------|------- `-abpt-close-err` | The assignment evaluation returns an abrupt completion, and the iterator's `return` method throws an error `-abpt-close-skip` | The assignment evaluation returns an abrupt completion, but IteratorClose is not invoked `-abpt-close` | The assignment evaluation returns an abrupt completion, and IteratorClose is invoked as specified `-get-err` | Abrupt completion returned from GetIterator `-nrml-close-err` | The assignment evaluation completes, and the iterator's `return` method throws an error `-nrml-close-null` | The assignment evaluation completes, and the iterator's `return` method returns a non-Object value (there is no corresponding `-abpt-` suffix because the algorithm does not reference the return value in those cases) `-nrml-close-skip` | The assignment evaluation completes, but IteratorClose is not invoked `-nrml-close` | The assignment evaluation completes, and IteratorClose is invoked as specified Not all suffixes are appropriate for all productions. Suffixes have been simplified in cases where less specificity is necessary to disambiguate test cases.
64 lines
1.7 KiB
JavaScript
64 lines
1.7 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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description: >
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IteratorClose is called when reference evaluation produces a "return"
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completion
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info: |
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ArrayAssignmentPattern : [ Elisionopt AssignmentRestElement ]
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[...]
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5. Let result be the result of performing
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IteratorDestructuringAssignmentEvaluation of AssignmentRestElement with
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iteratorRecord as the argument
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6. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
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result).
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AssignmentRestElement[Yield] : ... DestructuringAssignmentTarget
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1. If DestructuringAssignmentTarget is neither an ObjectLiteral nor an
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ArrayLiteral, then
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a. Let lref be the result of evaluating DestructuringAssignmentTarget.
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b. ReturnIfAbrupt(lref).
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7.4.6 IteratorClose( iterator, completion )
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[...]
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6. Let innerResult be Call(return, iterator, « »).
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7. If completion.[[type]] is throw, return Completion(completion).
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8. If innerResult.[[type]] is throw, return Completion(innerResult).
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features: [Symbol.iterator, generators]
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es6id: 12.14.5.2
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esid: sec-runtime-semantics-destructuringassignmentevaluation
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---*/
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var returnCount = 0;
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var unreachable = 0;
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function ReturnError() {}
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var iterable = {};
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var iterator = {
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return: function() {
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returnCount += 1;
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throw new Test262Error();
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}
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};
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var iter;
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iterable[Symbol.iterator] = function() {
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return iterator;
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};
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function* g() {
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[...{}[yield]] = iterable;
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unreachable += 1;
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}
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iter = g();
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iter.next();
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assert.throws(Test262Error, function() {
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iter.return();
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});
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assert.sameValue(returnCount, 1);
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assert.sameValue(unreachable, 0, 'Unreachable statement was not executed');
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