let-obj-ptrn-rest-skip-non-enumerable.js (1842B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/obj-ptrn-rest-skip-non-enumerable.case 3 // - src/dstr-binding/default/for-of-let.template 4 /*--- 5 description: Rest object doesn't contain non-enumerable properties (for-of statement) 6 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 7 features: [object-rest, destructuring-binding] 8 flags: [generated] 9 includes: [propertyHelper.js] 10 info: | 11 IterationStatement : 12 for ( ForDeclaration of AssignmentExpression ) Statement 13 14 [...] 15 3. Return ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult, 16 lexicalBinding, labelSet). 17 18 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 19 20 [...] 21 3. Let destructuring be IsDestructuring of lhs. 22 [...] 23 5. Repeat 24 [...] 25 h. If destructuring is false, then 26 [...] 27 i. Else 28 i. If lhsKind is assignment, then 29 [...] 30 ii. Else if lhsKind is varBinding, then 31 [...] 32 iii. Else, 33 1. Assert: lhsKind is lexicalBinding. 34 2. Assert: lhs is a ForDeclaration. 35 3. Let status be the result of performing BindingInitialization 36 for lhs passing nextValue and iterationEnv as arguments. 37 [...] 38 ---*/ 39 var o = {a: 3, b: 4}; 40 Object.defineProperty(o, "x", { value: 4, enumerable: false }); 41 42 var iterCount = 0; 43 44 for (let {...rest} of [o]) { 45 assert.sameValue(rest.x, undefined); 46 47 verifyProperty(rest, "a", { 48 enumerable: true, 49 writable: true, 50 configurable: true, 51 value: 3 52 }); 53 54 verifyProperty(rest, "b", { 55 enumerable: true, 56 writable: true, 57 configurable: true, 58 value: 4 59 }); 60 61 iterCount += 1; 62 } 63 64 assert.sameValue(iterCount, 1, 'Iteration occurred as expected'); 65 66 reportCompare(0, 0);