var-obj-ptrn-empty.js (1591B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/obj-ptrn-empty.case 3 // - src/dstr-binding/default/for-of-var.template 4 /*--- 5 description: No property access occurs for an "empty" object binding pattern (for-of statement) 6 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 7 features: [destructuring-binding] 8 flags: [generated] 9 info: | 10 IterationStatement : 11 for ( var ForBinding of AssignmentExpression ) Statement 12 13 [...] 14 3. Return ForIn/OfBodyEvaluation(ForBinding, Statement, keyResult, 15 varBinding, labelSet). 16 17 13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation 18 19 [...] 20 3. Let destructuring be IsDestructuring of lhs. 21 [...] 22 5. Repeat 23 [...] 24 h. If destructuring is false, then 25 [...] 26 i. Else 27 i. If lhsKind is assignment, then 28 [...] 29 ii. Else if lhsKind is varBinding, then 30 1. Assert: lhs is a ForBinding. 31 2. Let status be the result of performing BindingInitialization 32 for lhs passing nextValue and undefined as the arguments. 33 [...] 34 35 Runtime Semantics: BindingInitialization 36 37 ObjectBindingPattern : { } 38 39 1. Return NormalCompletion(empty). 40 ---*/ 41 var accessCount = 0; 42 var obj = Object.defineProperty({}, 'attr', { 43 get: function() { 44 accessCount += 1; 45 } 46 }); 47 48 var iterCount = 0; 49 50 for (var {} of [obj]) { 51 assert.sameValue(accessCount, 0); 52 53 iterCount += 1; 54 } 55 56 assert.sameValue(iterCount, 1, 'Iteration occurred as expected'); 57 58 reportCompare(0, 0);