array-elem-iter-nrml-close-err.js (1901B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-assignment/array-elem-iter-nrml-close-err.case 3 // - src/dstr-assignment/error/for-of.template 4 /*--- 5 description: Abrupt completion returned from IteratorClose (For..of statement) 6 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 7 features: [Symbol.iterator, destructuring-binding] 8 flags: [generated] 9 info: | 10 IterationStatement : 11 for ( LeftHandSideExpression of AssignmentExpression ) Statement 12 13 1. Let keyResult be the result of performing ? ForIn/OfHeadEvaluation(« », 14 AssignmentExpression, iterate). 15 2. Return ? ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement, 16 keyResult, assignment, labelSet). 17 18 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 19 20 [...] 21 4. If destructuring is true and if lhsKind is assignment, then 22 a. Assert: lhs is a LeftHandSideExpression. 23 b. Let assignmentPattern be the parse of the source text corresponding to 24 lhs using AssignmentPattern as the goal symbol. 25 [...] 26 27 ArrayAssignmentPattern : [ AssignmentElementList ] 28 29 [...] 30 5. If iteratorRecord.[[done]] is false, return IteratorClose(iterator, result). 31 32 ---*/ 33 var nextCount = 0; 34 var returnCount = 0; 35 var _; 36 var iterable = {}; 37 var iterator = { 38 next: function() { 39 nextCount += 1; 40 // Set an upper-bound to limit unnecessary iteration in non-conformant 41 // implementations 42 return { done: nextCount > 10 }; 43 }, 44 return: function() { 45 returnCount += 1; 46 throw new Test262Error(); 47 } 48 }; 49 iterable[Symbol.iterator] = function() { 50 return iterator; 51 }; 52 53 var counter = 0; 54 55 assert.throws(Test262Error, function() { 56 for ([ _ ] of [iterable]) { 57 counter += 1; 58 } 59 counter += 1; 60 }); 61 62 assert.sameValue(counter, 0); 63 64 assert.sameValue(nextCount, 1); 65 assert.sameValue(returnCount, 1); 66 67 reportCompare(0, 0);