ary-ptrn-rest-id-iter-step-err.js (1482B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-rest-id-iter-step-err.case 3 // - src/dstr-binding/error/try.template 4 /*--- 5 description: Error forwarding when IteratorStep returns an abrupt completion (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 BindingRestElement : ... BindingIdentifier 19 1. Let lhs be ResolveBinding(StringValue of BindingIdentifier, 20 environment). 21 2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat, 22 a. If iteratorRecord.[[done]] is false, 23 i. Let next be IteratorStep(iteratorRecord.[[iterator]]). 24 ii. If next is an abrupt completion, set iteratorRecord.[[done]] to 25 true. 26 iii. ReturnIfAbrupt(next). 27 28 ---*/ 29 var first = 0; 30 var second = 0; 31 var iter = function*() { 32 first += 1; 33 throw new Test262Error(); 34 second += 1; 35 }(); 36 37 assert.throws(Test262Error, function() { 38 try { 39 throw iter; 40 } catch ([...x]) {} 41 }); 42 43 iter.next(); 44 assert.sameValue(first, 1); 45 assert.sameValue(second, 0, 'Iterator is closed following abrupt completion.'); 46 47 reportCompare(0, 0);