// This file was procedurally generated from the following sources: // - src/dstr-assignment/array-elem-iter-rtrn-close.case // - src/dstr-assignment/default/for-of.template /*--- description: IteratorClose is called when reference evaluation produces a "return" completion (For..of statement) esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation features: [Symbol.iterator, generators, 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 : [ AssignmentElementList ] [...] 5. If iteratorRecord.[[done]] is false, return IteratorClose(iterator, result). 6. Return result. 7.4.6 IteratorClose( iterator, completion ) [...] 6. Let innerResult be Call(return, iterator, « »). 7. If completion.[[type]] is throw, return Completion(completion). 8. If innerResult.[[type]] is throw, return Completion(innerResult). ---*/ var nextCount = 0; var returnCount = 0; var unreachable = 0; var thisValue = null; var args = null; var iterator = { next: function() { nextCount += 1; return {done: false, value: undefined}; }, return: function() { returnCount += 1; thisValue = this; args = arguments; return {}; } }; var iterable = {}; iterable[Symbol.iterator] = function() { return iterator; }; function* g() { var counter = 0; for ([ {} = yield ] of [iterable]) { unreachable += 1; counter += 1; } assert.sameValue(counter, 1); } var iter = g(); iter.next(); assert.sameValue(nextCount, 1); assert.sameValue(returnCount, 0); var result = iter.return(777); assert.sameValue(nextCount, 1); assert.sameValue(returnCount, 1); assert.sameValue(unreachable, 0, 'Unreachable statement was not executed'); assert.sameValue(result.value, 777); assert(result.done, 'Iterator correctly closed'); assert.sameValue(thisValue, iterator, 'correct `this` value'); assert(!!args, 'arguments object provided'); assert.sameValue(args.length, 0, 'zero arguments specified'); reportCompare(0, 0);