spread-err-sngl-err-itr-step.js (1839B)
1 // This file was procedurally generated from the following sources: 2 // - src/spread/sngl-err-itr-step.case 3 // - src/spread/error/array.template 4 /*--- 5 description: Spread operator applied to the only argument when IteratorStep fails (Array initializer) 6 esid: sec-runtime-semantics-arrayaccumulation 7 features: [Symbol.iterator] 8 flags: [generated] 9 info: | 10 SpreadElement : ...AssignmentExpression 11 12 1. Let spreadRef be the result of evaluating AssignmentExpression. 13 2. Let spreadObj be ? GetValue(spreadRef). 14 3. Let iterator be ? GetIterator(spreadObj). 15 4. Repeat 16 a. Let next be ? IteratorStep(iterator). 17 b. If next is false, return nextIndex. 18 c. Let nextValue be ? IteratorValue(next). 19 d. Let status be CreateDataProperty(array, ToString(ToUint32(nextIndex)), 20 nextValue). 21 e. Assert: status is true. 22 f. Let nextIndex be nextIndex + 1. 23 24 12.3.6.1 Runtime Semantics: ArgumentListEvaluation 25 26 ArgumentList : ... AssignmentExpression 27 28 1. Let list be an empty List. 29 2. Let spreadRef be the result of evaluating AssignmentExpression. 30 3. Let spreadObj be GetValue(spreadRef). 31 4. Let iterator be GetIterator(spreadObj). 32 5. ReturnIfAbrupt(iterator). 33 6. Repeat 34 a. Let next be IteratorStep(iterator). 35 b. ReturnIfAbrupt(next). 36 37 7.4.5 IteratorStep ( iterator ) 38 39 1. Let result be IteratorNext(iterator). 40 2. ReturnIfAbrupt(result). 41 42 7.4.2 IteratorNext ( iterator, value ) 43 44 1. If value was not passed, then 45 a. Let result be Invoke(iterator, "next", « »). 46 [...] 47 3. ReturnIfAbrupt(result). 48 ---*/ 49 var iter = {}; 50 iter[Symbol.iterator] = function() { 51 return { 52 next: function() { 53 throw new Test262Error(); 54 } 55 }; 56 }; 57 58 assert.throws(Test262Error, function() { 59 [...iter]; 60 }); 61 62 reportCompare(0, 0);