ary-init-iter-close.js (1232B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-init-iter-close.case 3 // - src/dstr-binding/default/var-stmt.template 4 /*--- 5 description: Iterator is closed when not exhausted by pattern evaluation (`var` statement) 6 esid: sec-variable-statement-runtime-semantics-evaluation 7 features: [Symbol.iterator, 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 13.3.3.5 Runtime Semantics: BindingInitialization 19 20 BindingPattern : ArrayBindingPattern 21 22 [...] 23 4. If iteratorRecord.[[done]] is false, return ? IteratorClose(iterator, 24 result). 25 [...] 26 27 ---*/ 28 var doneCallCount = 0; 29 var iter = {}; 30 iter[Symbol.iterator] = function() { 31 return { 32 next: function() { 33 return { value: null, done: false }; 34 }, 35 return: function() { 36 doneCallCount += 1; 37 return {}; 38 } 39 }; 40 }; 41 42 var [x] = iter; 43 44 assert.sameValue(doneCallCount, 1); 45 46 reportCompare(0, 0);