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46 lines
1.5 KiB
JavaScript
46 lines
1.5 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-binding/ary-ptrn-rest-id-iter-step-err.case
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// - src/dstr-binding/error/var-stmt.template
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/*---
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description: Error forwarding when IteratorStep returns an abrupt completion (`var` statement)
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esid: sec-variable-statement-runtime-semantics-evaluation
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es6id: 13.3.2.4
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features: [generators, destructuring-binding]
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flags: [generated]
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info: |
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VariableDeclaration : BindingPattern Initializer
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1. Let rhs be the result of evaluating Initializer.
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2. Let rval be GetValue(rhs).
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3. ReturnIfAbrupt(rval).
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4. Return the result of performing BindingInitialization for
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BindingPattern passing rval and undefined as arguments.
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13.3.3.6 Runtime Semantics: IteratorBindingInitialization
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BindingRestElement : ... BindingIdentifier
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1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
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environment).
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2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
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a. If iteratorRecord.[[done]] is false,
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i. Let next be IteratorStep(iteratorRecord.[[iterator]]).
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ii. If next is an abrupt completion, set iteratorRecord.[[done]] to
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true.
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iii. ReturnIfAbrupt(next).
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---*/
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var first = 0;
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var second = 0;
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var iter = function*() {
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first += 1;
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throw new Test262Error();
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second += 1;
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}();
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assert.throws(Test262Error, function() {
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var [...x] = iter;
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});
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iter.next();
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assert.sameValue(first, 1);
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assert.sameValue(second, 0, 'Iterator is closed following abrupt completion.');
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