mirror of https://github.com/tc39/test262.git
76 lines
2.1 KiB
JavaScript
76 lines
2.1 KiB
JavaScript
// This file was procedurally generated from the following sources:
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// - src/dstr-assignment/array-elem-trlg-iter-elision-iter-nrml-close.case
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// - src/dstr-assignment/default/assignment-expr.template
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/*---
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description: IteratorClose invoked when elision does not exhaust the iterator (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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[...]
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8. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
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status).
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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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[...]
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---*/
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var nextCount = 0;
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var returnCount = 0;
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var thisValue = null;
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var args = null;
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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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// 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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thisValue = this;
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args = arguments;
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return {};
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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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var result;
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var vals = iterable;
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result = [ x , , ] = vals;
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assert.sameValue(nextCount, 2);
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assert.sameValue(returnCount, 1);
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assert.sameValue(thisValue, iterator, 'correct `this` value');
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assert(!!args, 'arguments object provided');
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assert.sameValue(args.length, 0, 'zero arguments specified');
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assert.sameValue(result, vals);
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