const-obj-ptrn-prop-ary-init.js (2011B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/obj-ptrn-prop-ary-init.case 3 // - src/dstr-binding/default/for-of-const.template 4 /*--- 5 description: Object binding pattern with "nested" array 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 ( ForDeclaration of AssignmentExpression ) Statement 12 13 [...] 14 3. Return ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult, 15 lexicalBinding, 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 [...] 31 iii. Else, 32 1. Assert: lhsKind is lexicalBinding. 33 2. Assert: lhs is a ForDeclaration. 34 3. Let status be the result of performing BindingInitialization 35 for lhs passing nextValue and iterationEnv as arguments. 36 [...] 37 38 13.3.3.7 Runtime Semantics: KeyedBindingInitialization 39 40 [...] 41 3. If Initializer is present and v is undefined, then 42 a. Let defaultValue be the result of evaluating Initializer. 43 b. Let v be GetValue(defaultValue). 44 c. ReturnIfAbrupt(v). 45 4. Return the result of performing BindingInitialization for BindingPattern 46 passing v and environment as arguments. 47 ---*/ 48 49 var iterCount = 0; 50 51 for (const { w: [x, y, z] = [4, 5, 6] } of [{}]) { 52 assert.sameValue(x, 4); 53 assert.sameValue(y, 5); 54 assert.sameValue(z, 6); 55 56 assert.throws(ReferenceError, function() { 57 w; 58 }); 59 60 iterCount += 1; 61 } 62 63 assert.sameValue(iterCount, 1, 'iteration occurred as expected'); 64 65 reportCompare(0, 0);