const-ary-ptrn-rest-id-exhausted.js (1981B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-rest-id-exhausted.case 3 // - src/dstr-binding/default/for-of-const.template 4 /*--- 5 description: RestElement applied to an exhausted iterator (for-of statement) 6 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 7 features: [Symbol.iterator, 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 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 39 BindingRestElement : ... BindingIdentifier 40 1. Let lhs be ResolveBinding(StringValue of BindingIdentifier, 41 environment). 42 2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat, 43 [...] 44 b. If iteratorRecord.[[done]] is true, then 45 i. If environment is undefined, return PutValue(lhs, A). 46 ii. Return InitializeReferencedBinding(lhs, A). 47 48 ---*/ 49 50 var iterCount = 0; 51 52 for (const [, , ...x] of [[1, 2]]) { 53 assert(Array.isArray(x)); 54 assert.sameValue(x.length, 0); 55 56 iterCount += 1; 57 } 58 59 assert.sameValue(iterCount, 1, 'iteration occurred as expected'); 60 61 reportCompare(0, 0);