var-ary-ptrn-elision-step-err.js (2033B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-elision-step-err.case 3 // - src/dstr-binding/error/for-of-var.template 4 /*--- 5 description: Elision advances iterator and forwards abrupt completions (for-of statement) 6 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 7 features: [generators, destructuring-binding] 8 flags: [generated] 9 info: | 10 IterationStatement : 11 for ( var ForBinding of AssignmentExpression ) Statement 12 13 [...] 14 3. Return ForIn/OfBodyEvaluation(ForBinding, Statement, keyResult, 15 varBinding, labelSet). 16 17 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 18 19 [...] 20 3. Let destructuring be IsDestructuring of lhs. 21 [...] 22 5. Repeat 23 [...] 24 h. If destructuring is false, then 25 [...] 26 i. Else 27 i. If lhsKind is assignment, then 28 [...] 29 ii. Else if lhsKind is varBinding, then 30 1. Assert: lhs is a ForBinding. 31 2. Let status be the result of performing BindingInitialization 32 for lhs passing nextValue and undefined as the arguments. 33 [...] 34 35 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 36 37 ArrayBindingPattern : [ Elision ] 38 39 1. Return the result of performing 40 IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord 41 as the argument. 42 43 12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation 44 45 Elision : , 46 47 1. If iteratorRecord.[[done]] is false, then 48 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 49 b. If next is an abrupt completion, set iteratorRecord.[[done]] to true. 50 c. ReturnIfAbrupt(next). 51 52 ---*/ 53 var following = 0; 54 var iter =function* () { 55 throw new Test262Error(); 56 following += 1; 57 }(); 58 59 assert.throws(Test262Error, function() { 60 for (var [,] of [iter]) { 61 return; 62 } 63 }); 64 65 iter.next(); 66 assert.sameValue(following, 0, 'Iterator was properly closed.'); 67 68 reportCompare(0, 0);