obj-ptrn-id-init-skipped.js (1246B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/obj-ptrn-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 13.3.3.7 Runtime Semantics: KeyedBindingInitialization 18 19 SingleNameBinding : BindingIdentifier Initializeropt 20 21 [...] 22 6. If Initializer is present and v is undefined, then 23 [...] 24 [...] 25 ---*/ 26 var initCount = 0; 27 function counter() { 28 initCount += 1; 29 } 30 31 var ranCatch = false; 32 33 try { 34 throw { w: null, x: 0, y: false, z: '' }; 35 } catch ({ w = counter(), x = counter(), y = counter(), z = counter() }) { 36 assert.sameValue(w, null); 37 assert.sameValue(x, 0); 38 assert.sameValue(y, false); 39 assert.sameValue(z, ''); 40 assert.sameValue(initCount, 0); 41 ranCatch = true; 42 } 43 44 assert(ranCatch, 'executed `catch` block'); 45 46 reportCompare(0, 0);