tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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array-elem-trlg-iter-elision-iter-nrml-close.js (2175B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-assignment/array-elem-trlg-iter-elision-iter-nrml-close.case
      3 // - src/dstr-assignment/default/assignment-expr.template
      4 /*---
      5 description: IteratorClose invoked when elision does not exhaust the iterator (AssignmentExpression)
      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    ArrayAssignmentPattern :
     19        [ AssignmentElementList , Elisionopt AssignmentRestElementopt ]
     20 
     21    [...]
     22    6. If Elision is present, then
     23       a. Let status be the result of performing
     24          IteratorDestructuringAssignmentEvaluation of Elision with
     25          iteratorRecord as the argument.
     26       b. If status is an abrupt completion, then
     27          [...]
     28    8. If iteratorRecord.[[done]] is false, return IteratorClose(iterator,
     29       status).
     30 
     31    7.4.6 IteratorClose( iterator, completion )
     32 
     33    [...]
     34    6. Let innerResult be Call(return, iterator, « »).
     35    [...]
     36 
     37 ---*/
     38 var nextCount = 0;
     39 var returnCount = 0;
     40 var thisValue = null;
     41 var args = null;
     42 var iterable = {};
     43 var x;
     44 var iterator = {
     45  next: function() {
     46    nextCount += 1;
     47 
     48    // Set an upper-bound to limit unnecessary iteration in non-conformant
     49    // implementations
     50    return { done: nextCount > 10 };
     51  },
     52  return: function() {
     53    returnCount += 1;
     54    thisValue = this;
     55    args = arguments;
     56    return {};
     57  }
     58 };
     59 iterable[Symbol.iterator] = function() {
     60  return iterator;
     61 };
     62 
     63 var result;
     64 var vals = iterable;
     65 
     66 result = [ x , , ] = vals;
     67 
     68 assert.sameValue(nextCount, 2);
     69 assert.sameValue(returnCount, 1);
     70 assert.sameValue(thisValue, iterator, 'correct `this` value');
     71 assert(!!args, 'arguments object provided');
     72 assert.sameValue(args.length, 0, 'zero arguments specified');
     73 
     74 assert.sameValue(result, vals);
     75 
     76 reportCompare(0, 0);