ary-ptrn-elision-step-err.js (1599B)
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/let-stmt.template 4 /*--- 5 description: Elision advances iterator and forwards abrupt completions (`let` statement) 6 esid: sec-let-and-const-declarations-runtime-semantics-evaluation 7 features: [generators, destructuring-binding] 8 flags: [generated] 9 info: | 10 LexicalBinding : BindingPattern Initializer 11 12 1. Let rhs be the result of evaluating Initializer. 13 2. Let value be GetValue(rhs). 14 3. ReturnIfAbrupt(value). 15 4. Let env be the running execution context's LexicalEnvironment. 16 5. Return the result of performing BindingInitialization for BindingPattern 17 using value and env as the arguments. 18 19 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 20 21 ArrayBindingPattern : [ Elision ] 22 23 1. Return the result of performing 24 IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord 25 as the argument. 26 27 12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation 28 29 Elision : , 30 31 1. If iteratorRecord.[[done]] is false, then 32 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 33 b. If next is an abrupt completion, set iteratorRecord.[[done]] to true. 34 c. ReturnIfAbrupt(next). 35 36 ---*/ 37 var following = 0; 38 var iter =function* () { 39 throw new Test262Error(); 40 following += 1; 41 }(); 42 43 assert.throws(Test262Error, function() { 44 let [,] = iter; 45 }); 46 47 iter.next(); 48 assert.sameValue(following, 0, 'Iterator was properly closed.'); 49 50 reportCompare(0, 0);