mirror of https://github.com/tc39/test262.git
64 lines
1.8 KiB
JavaScript
64 lines
1.8 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-assignment/array-elem-trlg-iter-elision-iter-abpt.case
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// - src/dstr-assignment/error/assignment-expr.template
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/*---
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description: Abrupt completion returned during evaluation of elision (AssignmentExpression)
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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: [Symbol.iterator, 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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ArrayAssignmentPattern :
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[ AssignmentElementList , Elisionopt AssignmentRestElementopt ]
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[...]
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6. If Elision is present, then
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a. Let status be the result of performing
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IteratorDestructuringAssignmentEvaluation of Elision with
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iteratorRecord as the argument.
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b. If status is an abrupt completion, then
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i. If iteratorRecord.[[done]] is false, return
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IteratorClose(iterator, status).
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ii. Return Completion(status).
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---*/
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var nextCount = 0;
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var returnCount = 0;
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var iterable = {};
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var x;
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var iterator = {
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next: function() {
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nextCount += 1;
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if (nextCount === 2) {
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throw new Test262Error();
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}
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// Set an upper-bound to limit unnecessary iteration in non-conformant
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// implementations
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return { done: nextCount > 10 };
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},
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return: function() {
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returnCount += 1;
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}
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};
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iterable[Symbol.iterator] = function() {
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return iterator;
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};
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assert.throws(Test262Error, function() {
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0, [ x , , ] = iterable;
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});
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assert.sameValue(nextCount, 2);
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assert.sameValue(returnCount, 0);
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