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// This file was procedurally generated from the following sources:
// - src/dstr-assignment/array-rest-iter-thrw-close-err.case
// - src/dstr-assignment/error/for-of.template
/*---
description: IteratorClose is called when reference evaluation produces a "throw" completion (For..of statement)
esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation
features: [Symbol.iterator, destructuring-binding]
flags: [generated]
info: |
IterationStatement :
for ( LeftHandSideExpression of AssignmentExpression ) Statement
1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« »,
AssignmentExpression, iterate).
2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement,
keyResult, assignment, labelSet).
13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
[...]
4. If destructuring is true and if lhsKind is assignment, then
a. Assert: lhs is a LeftHandSideExpression.
b. Let assignmentPattern be the parse of the source text corresponding to
lhs using AssignmentPattern as the goal symbol.
[...]
ArrayAssignmentPattern : [ Elisionopt AssignmentRestElement ]
[...]
5. Let result be the result of performing
IteratorDestructuringAssignmentEvaluation of AssignmentRestElement with
iteratorRecord as the argument
6. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
result).
AssignmentRestElement[Yield] : ... DestructuringAssignmentTarget
1. If DestructuringAssignmentTarget is neither an ObjectLiteral nor an
ArrayLiteral, then
a. Let lref be the result of evaluating DestructuringAssignmentTarget.
b. ReturnIfAbrupt(lref).
---*/
var nextCount = 0;
var returnCount = 0;
var x;
function ReturnError() {}
var iterable = {};
var iterator = {
next: function() {
nextCount += 1;
// Set an upper-bound to limit unnecessary iteration in non-conformant
// implementations
return { done: nextCount > 10 };
},
return: function() {
returnCount += 1;
// This value should be discarded.
throw new ReturnError();
}
};
var thrower = function() {
throw new Test262Error();
};
iterable[Symbol.iterator] = function() {
return iterator;
};
var counter = 0;
assert.throws(Test262Error, function() {
for ([...{}[thrower()]] of [iterable]) {
counter += 1;
}
counter += 1;
});
assert.sameValue(counter, 0);
assert.sameValue(nextCount, 0);
assert.sameValue(returnCount, 1);
reportCompare(0, 0);
|
