array-elem-iter-nrml-close.js (1885B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-assignment/array-elem-iter-nrml-close.case 3 // - src/dstr-assignment/default/assignment-expr.template 4 /*--- 5 description: IteratorClose is called when assignment evaluation has not exhausted the iterator (AssignmentExpression) 6 esid: sec-variable-statement-runtime-semantics-evaluation 7 features: [Symbol.iterator, destructuring-binding] 8 flags: [generated] 9 info: | 10 VariableDeclaration : BindingPattern Initializer 11 12 1. Let rhs be the result of evaluating Initializer. 13 2. Let rval be GetValue(rhs). 14 3. ReturnIfAbrupt(rval). 15 4. Return the result of performing BindingInitialization for 16 BindingPattern passing rval and undefined as arguments. 17 18 ArrayAssignmentPattern : [ AssignmentElementList ] 19 20 [...] 21 5. If iteratorRecord.[[done]] is false, return IteratorClose(iterator, 22 result). 23 6. Return result. 24 25 7.4.6 IteratorClose( iterator, completion ) 26 27 [...] 28 6. Let innerResult be Call(return, iterator, « »). 29 [...] 30 31 ---*/ 32 var nextCount = 0; 33 var returnCount = 0; 34 var thisValue = null; 35 var args = null; 36 var _; 37 var iterable = {}; 38 var iterator = { 39 next: function() { 40 nextCount += 1; 41 // Set an upper-bound to limit unnecessary iteration in non-conformant 42 // implementations 43 return { done: nextCount > 10 }; 44 }, 45 return: function() { 46 returnCount += 1; 47 thisValue = this; 48 args = arguments; 49 return {}; 50 } 51 }; 52 iterable[Symbol.iterator] = function() { 53 return iterator; 54 }; 55 56 var result; 57 var vals = iterable; 58 59 result = [ _ ] = vals; 60 61 assert.sameValue(nextCount, 1); 62 assert.sameValue(returnCount, 1); 63 assert.sameValue(thisValue, iterator, 'correct `this` value'); 64 assert(!!args, 'arguments object provided'); 65 assert.sameValue(args.length, 0, 'zero arguments specified'); 66 67 assert.sameValue(result, vals); 68 69 reportCompare(0, 0);