tor-browser

The Tor Browser
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ary-ptrn-rest-id-iter-step-err.js (2176B)

      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/func-expr.template
      4 /*---
      5 description: Error forwarding when IteratorStep returns an abrupt completion (function expression)
      6 esid: sec-function-definitions-runtime-semantics-evaluation
      7 features: [generators, destructuring-binding]
      8 flags: [generated]
      9 info: |
     10    FunctionExpression : function ( FormalParameters ) { FunctionBody }
     11 
     12        [...]
     13        3. Let closure be FunctionCreate(Normal, FormalParameters, FunctionBody,
     14           scope, strict).
     15        [...]
     16 
     17    9.2.1 [[Call]] ( thisArgument, argumentsList)
     18 
     19    [...]
     20    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     21    [...]
     22 
     23    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     24 
     25    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     26    [...]
     27 
     28    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     29 
     30    [...]
     31    23. Let iteratorRecord be Record {[[iterator]]:
     32        CreateListIterator(argumentsList), [[done]]: false}.
     33    24. If hasDuplicates is true, then
     34        [...]
     35    25. Else,
     36        b. Let formalStatus be IteratorBindingInitialization for formals with
     37           iteratorRecord and env as arguments.
     38    [...]
     39 
     40    13.3.3.6 Runtime Semantics: IteratorBindingInitialization
     41    BindingRestElement : ... BindingIdentifier
     42    1. Let lhs be ResolveBinding(StringValue of BindingIdentifier,
     43       environment).
     44    2. ReturnIfAbrupt(lhs). 3. Let A be ArrayCreate(0). 4. Let n=0. 5. Repeat,
     45       a. If iteratorRecord.[[done]] is false,
     46          i. Let next be IteratorStep(iteratorRecord.[[iterator]]).
     47          ii. If next is an abrupt completion, set iteratorRecord.[[done]] to
     48              true.
     49          iii. ReturnIfAbrupt(next).
     50 
     51 ---*/
     52 var first = 0;
     53 var second = 0;
     54 var iter = function*() {
     55  first += 1;
     56  throw new Test262Error();
     57  second += 1;
     58 }();
     59 
     60 var f = function([...x]) {};
     61 
     62 assert.throws(Test262Error, function() {
     63  f(iter);
     64 });
     65 
     66 iter.next();
     67 assert.sameValue(first, 1);
     68 assert.sameValue(second, 0, 'Iterator is closed following abrupt completion.');
     69 
     70 reportCompare(0, 0);