spread-err-mult-err-iter-get-value.js (1642B)
1 // This file was procedurally generated from the following sources: 2 // - src/spread/mult-err-iter-get-value.case 3 // - src/spread/error/array.template 4 /*--- 5 description: Spread operator following other arguments when GetIterator fails (@@iterator function return value) (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 : ArgumentList , ... AssignmentExpression 27 28 1. Let precedingArgs be the result of evaluating ArgumentList. 29 2. Let spreadRef be the result of evaluating AssignmentExpression. 30 3. Let iterator be GetIterator(GetValue(spreadRef) ). 31 4. ReturnIfAbrupt(iterator). 32 33 7.4.1 GetIterator ( obj, method ) 34 35 [...] 36 2. Let iterator be ? Call(method, obj). 37 3. If Type(iterator) is not Object, throw a TypeError exception. 38 ---*/ 39 var iter = {}; 40 Object.defineProperty(iter, Symbol.iterator, { 41 get: function() { 42 return null; 43 } 44 }); 45 46 assert.throws(TypeError, function() { 47 [0, ...iter]; 48 }); 49 50 reportCompare(0, 0);