let-ary-ptrn-empty.js (1673B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-empty.case 3 // - src/dstr-binding/default/for-of-let.template 4 /*--- 5 description: No iteration occurs for an "empty" array binding pattern (for-of statement) 6 esid: sec-for-in-and-for-of-statements-runtime-semantics-labelledevaluation 7 features: [generators, 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 40 ArrayBindingPattern : [ ] 41 42 1. Return NormalCompletion(empty). 43 44 ---*/ 45 var iterations = 0; 46 var iter = function*() { 47 iterations += 1; 48 }(); 49 50 var iterCount = 0; 51 52 for (let [] of [iter]) { 53 assert.sameValue(iterations, 0); 54 55 iterCount += 1; 56 } 57 58 assert.sameValue(iterCount, 1, 'Iteration occurred as expected'); 59 60 reportCompare(0, 0);