var-obj-ptrn-prop-obj-init.js (1927B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/obj-ptrn-prop-obj-init.case 3 // - src/dstr-binding/default/for-of-var.template 4 /*--- 5 description: Object binding pattern with "nested" object binding pattern using initializer (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 13.3.3.7 Runtime Semantics: KeyedBindingInitialization 36 37 [...] 38 3. If Initializer is present and v is undefined, then 39 a. Let defaultValue be the result of evaluating Initializer. 40 b. Let v be GetValue(defaultValue). 41 c. ReturnIfAbrupt(v). 42 4. Return the result of performing BindingInitialization for BindingPattern 43 passing v and environment as arguments. 44 ---*/ 45 46 var iterCount = 0; 47 48 for (var { w: { x, y, z } = { x: 4, y: 5, z: 6 } } of [{ w: undefined }]) { 49 assert.sameValue(x, 4); 50 assert.sameValue(y, 5); 51 assert.sameValue(z, 6); 52 53 assert.throws(ReferenceError, function() { 54 w; 55 }); 56 57 iterCount += 1; 58 } 59 60 assert.sameValue(iterCount, 1, 'Iteration occurred as expected'); 61 62 reportCompare(0, 0);