cptn-decl-skip-itr.js (1019B)
1 // Copyright (C) 2016 the V8 project authors. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 /*--- 4 es6id: 13.7.5.11 5 description: > 6 Completion value when head has a declaration and iteration is skipped 7 info: | 8 IterationStatement : for ( var ForBinding in Expression ) Statement 9 10 1. Let keyResult be ForIn/OfHeadEvaluation( « », Expression, enumerate). 11 2. ReturnIfAbrupt(keyResult). 12 13 13.7.5.12 Runtime Semantics: ForIn/OfHeadEvaluation 14 15 [...] 16 7. If iterationKind is enumerate, then 17 a. If exprValue.[[value]] is null or undefined, then 18 i. Return Completion{[[type]]: break, [[value]]: empty, [[target]]: 19 empty}. 20 ---*/ 21 22 assert.sameValue(eval('1; for (var a in undefined) { }'), undefined); 23 assert.sameValue(eval('2; for (var b in undefined) { 3; }'), undefined); 24 assert.sameValue(eval('4; for (var c in null) { }'), undefined); 25 assert.sameValue(eval('5; for (var d in null) { 6; }'), undefined); 26 27 reportCompare(0, 0);