// Copyright (C) 2016 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- desc: > IteratorClose is invoked when evaluation of AssignmentElementList completes without exhausting the iterator info: | 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, « »). [...] features: [Symbol.iterator] template: default es6id: 12.14.5.2 esid: sec-runtime-semantics-destructuringassignmentevaluation ---*/ //- setup var nextCount = 0; var returnCount = 0; var thisValue = null; var args = null; var iterable = {}; var x; 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; thisValue = this; args = arguments; return {}; } }; iterable[Symbol.iterator] = function() { return iterator; }; //- elems [ x , ] //- vals iterable //- body assert.sameValue(nextCount, 1); assert.sameValue(returnCount, 1); assert.sameValue(thisValue, iterator, 'correct `this` value'); assert(!!args, 'arguments object provided'); assert.sameValue(args.length, 0, 'zero arguments specified');