Source code
Revision control
Copy as Markdown
Other Tools
// This file was procedurally generated from the following sources:
// - src/dstr-assignment/array-elem-trlg-iter-list-thrw-close.case
// - src/dstr-assignment/error/assignment-expr.template
/*---
description: IteratorClose is invoked when evaluation of AssignmentElementList returns a "throw" completion and the iterator has not been marked as "done" (AssignmentExpression)
esid: sec-variable-statement-runtime-semantics-evaluation
features: [Symbol.iterator, destructuring-binding]
flags: [generated]
info: |
VariableDeclaration : BindingPattern Initializer
1. Let rhs be the result of evaluating Initializer.
2. Let rval be GetValue(rhs).
3. ReturnIfAbrupt(rval).
4. Return the result of performing BindingInitialization for
BindingPattern passing rval and undefined as arguments.
ArrayAssignmentPattern :
[ AssignmentElementList , Elisionopt AssignmentRestElementopt ]
[...]
3. Let iteratorRecord be Record {[[iterator]]: iterator, [[done]]: false}.
4. Let status be the result of performing
IteratorDestructuringAssignmentEvaluation of AssignmentElementList using
iteratorRecord as the argument.
5. If status is an abrupt completion, then
a. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
status).
b. Return Completion(status).
7.4.6 IteratorClose( iterator, completion )
[...]
6. Let innerResult be Call(return, iterator, « »).
[...]
---*/
var nextCount = 0;
var returnCount = 0;
var thisValue = null;
var args = null;
var iterable = {};
var thrower = function() {
throw new Test262Error();
};
var iterator = {
next: function() {
nextCount += 1;
return { done: true };
},
return: function() {
returnCount += 1;
thisValue = this;
args = arguments;
}
};
iterable[Symbol.iterator] = function() {
return iterator;
};
assert.throws(Test262Error, function() {
0, [ {}[thrower()] , ] = iterable;
});
assert.sameValue(nextCount, 0);
assert.sameValue(returnCount, 1);
assert.sameValue(thisValue, iterator, 'correct `this` value');
assert(!!args, 'arguments object provided');
assert.sameValue(args.length, 0, 'zero arguments specified');
reportCompare(0, 0);