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// Copyright (C) 2017 André Bargull. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-runtime-semantics-forin-div-ofbodyevaluation-lhs-stmt-iterator-lhskind-labelset
description: >
Generators should be closed via their `return` method when iteration is
interrupted via a `continue` statement.
info: |
13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation ( lhs, stmt, iteratorRecord, iterationKind, lhsKind, labelSet )
...
5. Repeat,
...
i. Let result be the result of evaluating stmt.
...
k. If LoopContinues(result, labelSet) is false, then
i. If iterationKind is enumerate, then
...
ii. Else,
1. Assert: iterationKind is iterate.
2. Return ? IteratorClose(iteratorRecord, UpdateEmpty(result, V)).
...
features: [generators]
---*/
var startedCount = 0;
var finallyCount = 0;
var iterationCount = 0;
function* values() {
startedCount += 1;
try {
yield;
throw new Test262Error('This code is unreachable (within `try` block)');
} finally {
finallyCount += 1;
}
throw new Test262Error('This code is unreachable (following `try` statement)');
}
var iterable = values();
assert.sameValue(
startedCount, 0, 'Generator is initialized in suspended state'
);
L: do {
for (var x of iterable) {
assert.sameValue(
startedCount, 1, 'Generator executes prior to first iteration'
);
assert.sameValue(
finallyCount, 0, 'Generator is paused during first iteration'
);
iterationCount += 1;
continue L;
}
} while (false);
assert.sameValue(
startedCount, 1, 'Generator does not restart following interruption'
);
assert.sameValue(iterationCount, 1, 'A single iteration occurs');
assert.sameValue(
finallyCount, 1, 'Generator is closed after `continue` statement'
);
reportCompare(0, 0);
|
