ary-ptrn-elision.js (1517B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-elision.case 3 // - src/dstr-binding/default/try.template 4 /*--- 5 description: Elision advances iterator (try statement) 6 esid: sec-runtime-semantics-catchclauseevaluation 7 features: [generators, destructuring-binding] 8 flags: [generated] 9 info: | 10 Catch : catch ( CatchParameter ) Block 11 12 [...] 13 5. Let status be the result of performing BindingInitialization for 14 CatchParameter passing thrownValue and catchEnv as arguments. 15 [...] 16 17 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 18 19 ArrayBindingPattern : [ Elision ] 20 21 1. Return the result of performing 22 IteratorDestructuringAssignmentEvaluation of Elision with iteratorRecord 23 as the argument. 24 25 12.14.5.3 Runtime Semantics: IteratorDestructuringAssignmentEvaluation 26 27 Elision : , 28 29 1. If iteratorRecord.[[done]] is false, then 30 a. Let next be IteratorStep(iteratorRecord.[[iterator]]). 31 b. If next is an abrupt completion, set iteratorRecord.[[done]] to true. 32 c. ReturnIfAbrupt(next). 33 d. If next is false, set iteratorRecord.[[done]] to true. 34 2. Return NormalCompletion(empty). 35 36 ---*/ 37 var first = 0; 38 var second = 0; 39 function* g() { 40 first += 1; 41 yield; 42 second += 1; 43 }; 44 45 var ranCatch = false; 46 47 try { 48 throw g(); 49 } catch ([,]) { 50 assert.sameValue(first, 1); 51 assert.sameValue(second, 0); 52 ranCatch = true; 53 } 54 55 assert(ranCatch, 'executed `catch` block'); 56 57 reportCompare(0, 0);