tor-browser

The Tor Browser
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array-rest-iter-rtrn-close-null.js (2148B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-assignment/array-rest-iter-rtrn-close-null.case
      3 // - src/dstr-assignment/default/assignment-expr.template
      4 /*---
      5 description: IteratorClose throws a TypeError when `return` returns a non-Object value (AssignmentExpression)
      6 esid: sec-variable-statement-runtime-semantics-evaluation
      7 features: [Symbol.iterator, 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    ArrayAssignmentPattern : [ Elisionopt AssignmentRestElement ]
     19 
     20    [...]
     21    5. Let result be the result of performing
     22       IteratorDestructuringAssignmentEvaluation of AssignmentRestElement with
     23       iteratorRecord as the argument
     24    6. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
     25       result).
     26 
     27    AssignmentRestElement[Yield] : ... DestructuringAssignmentTarget
     28 
     29    1. If DestructuringAssignmentTarget is neither an ObjectLiteral nor an
     30       ArrayLiteral, then
     31       a. Let lref be the result of evaluating DestructuringAssignmentTarget.
     32       b. ReturnIfAbrupt(lref).
     33 
     34    7.4.6 IteratorClose( iterator, completion )
     35 
     36    [...]
     37    6. Let innerResult be Call(return, iterator, « »).
     38    [...]
     39 
     40    7.4.6 IteratorClose( iterator, completion )
     41 
     42    [...]
     43    6. Let innerResult be Call(return, iterator, « »).
     44    7. If completion.[[type]] is throw, return Completion(completion).
     45    8. If innerResult.[[type]] is throw, return Completion(innerResult).
     46 
     47 ---*/
     48 var iterable = {};
     49 var iterator = {
     50  return: function() {
     51    return null;
     52  }
     53 };
     54 var iter;
     55 iterable[Symbol.iterator] = function() {
     56  return iterator;
     57 };
     58 
     59 function* g() {
     60 
     61 var result;
     62 var vals = iterable;
     63 
     64 result = [...{}[yield]] = vals;
     65 
     66 
     67 
     68 assert.sameValue(result, vals);
     69 
     70 }
     71 
     72 iter = g();
     73 iter.next();
     74 
     75 assert.throws(TypeError, function() {
     76  iter.return();
     77 });
     78 
     79 reportCompare(0, 0);