ary-ptrn-rest-id-iter-step-err.js (1568B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-rest-id-iter-step-err.case 3 // - src/dstr-binding/error/var-stmt.template 4 /*--- 5 description: Error forwarding when IteratorStep returns an abrupt completion (`var` statement) 6 esid: sec-variable-statement-runtime-semantics-evaluation 7 features: [generators, destructuring-binding] 8 flags: [generated] 9 info: | 10 VariableDeclaration : BindingPattern Initializer 11 12 1. Let rhs be the result of evaluating Initializer. 13 2. Let rval be GetValue(rhs). 14 3. ReturnIfAbrupt(rval). 15 4. Return the result of performing BindingInitialization for 16 BindingPattern passing rval and undefined as arguments. 17 18 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 19 BindingRestElement : ... BindingIdentifier 20 1. Let lhs be ResolveBinding(StringValue of BindingIdentifier, 21 environment). 22 2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat, 23 a. If iteratorRecord.[[done]] is false, 24 i. Let next be IteratorStep(iteratorRecord.[[iterator]]). 25 ii. If next is an abrupt completion, set iteratorRecord.[[done]] to 26 true. 27 iii. ReturnIfAbrupt(next). 28 29 ---*/ 30 var first = 0; 31 var second = 0; 32 var iter = function*() { 33 first += 1; 34 throw new Test262Error(); 35 second += 1; 36 }(); 37 38 assert.throws(Test262Error, function() { 39 var [...x] = iter; 40 }); 41 42 iter.next(); 43 assert.sameValue(first, 1); 44 assert.sameValue(second, 0, 'Iterator is closed following abrupt completion.'); 45 46 reportCompare(0, 0);