ary-ptrn-elem-id-init-skipped.js (1340B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-elem-id-init-skipped.case 3 // - src/dstr-binding/default/try.template 4 /*--- 5 description: Destructuring initializer is not evaluated when value is not `undefined` (try statement) 6 esid: sec-runtime-semantics-catchclauseevaluation 7 features: [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 SingleNameBinding : BindingIdentifier Initializeropt 20 21 [...] 22 6. If Initializer is present and v is undefined, then 23 [...] 24 7. If environment is undefined, return PutValue(lhs, v). 25 8. Return InitializeReferencedBinding(lhs, v). 26 ---*/ 27 var initCount = 0; 28 function counter() { 29 initCount += 1; 30 } 31 32 var ranCatch = false; 33 34 try { 35 throw [null, 0, false, '']; 36 } catch ([w = counter(), x = counter(), y = counter(), z = counter()]) { 37 assert.sameValue(w, null); 38 assert.sameValue(x, 0); 39 assert.sameValue(y, false); 40 assert.sameValue(z, ''); 41 assert.sameValue(initCount, 0); 42 ranCatch = true; 43 } 44 45 assert(ranCatch, 'executed `catch` block'); 46 47 reportCompare(0, 0);