array-elision-iter-nrml-close-err.js (1489B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-assignment/array-elision-iter-nrml-close-err.case 3 // - src/dstr-assignment/error/assignment-expr.template 4 /*--- 5 description: Abrupt completion returned from IteratorClose (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 : [ Elision ] 19 20 1. Let iterator be GetIterator(value). 21 [...] 22 5. If iteratorRecord.[[done]] is false, return IteratorClose(iterator, 23 result). 24 6. Return result. 25 26 ---*/ 27 var nextCount = 0; 28 var returnCount = 0; 29 var iterable = {}; 30 var iterator = { 31 next: function() { 32 nextCount += 1; 33 // Set an upper-bound to limit unnecessary iteration in non-conformant 34 // implementations 35 return { done: nextCount > 10 }; 36 }, 37 return: function() { 38 returnCount += 1; 39 throw new Test262Error(); 40 } 41 }; 42 iterable[Symbol.iterator] = function() { 43 return iterator; 44 }; 45 46 assert.throws(Test262Error, function() { 47 0, [ , ] = iterable; 48 }); 49 50 assert.sameValue(nextCount, 1); 51 assert.sameValue(returnCount, 1); 52 53 reportCompare(0, 0);