star-rhs-iter-nrml-next-call-err.js (1328B)
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 esid: sec-generator-function-definitions-runtime-semantics-evaluation 5 es6id: 14.4.14 6 description: Abrupt completion returned when invoking iterator `next` method 7 info: | 8 YieldExpression : yield * AssignmentExpression 9 10 1. Let exprRef be the result of evaluating AssignmentExpression. 11 2. Let value be ? GetValue(exprRef). 12 3. Let iterator be ? GetIterator(value). 13 4. Let received be NormalCompletion(undefined). 14 5. Repeat 15 a. If received.[[Type]] is normal, then 16 i. Let innerResult be ? IteratorNext(iterator, received.[[Value]]). 17 18 7.4.2 IteratorNext 19 20 1. If value was not passed, then 21 [...] 22 2. Else, 23 a. Let result be ? Invoke(iterator, "next", « value »). 24 features: [generators, Symbol.iterator] 25 ---*/ 26 27 var thrown = new Test262Error(); 28 var badIter = {}; 29 badIter[Symbol.iterator] = function() { 30 return { 31 next: function() { 32 throw thrown; 33 } 34 }; 35 }; 36 function* g() { 37 try { 38 yield * badIter; 39 } catch (err) { 40 caught = err; 41 } 42 } 43 var iter = g(); 44 var result, caught; 45 46 result = iter.next(); 47 48 assert.sameValue(result.value, undefined); 49 assert.sameValue(result.done, true); 50 assert.sameValue(caught, thrown); 51 52 reportCompare(0, 0);