tor-browser

The Tor Browser
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ary-ptrn-elem-id-iter-step-err.js (1947B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/ary-ptrn-elem-id-iter-step-err.case
      3 // - src/dstr-binding/error/gen-func-decl.template
      4 /*---
      5 description: Error forwarding when IteratorStep returns an abrupt completion (generator function declaration)
      6 esid: sec-generator-function-definitions-runtime-semantics-instantiatefunctionobject
      7 features: [Symbol.iterator, generators, destructuring-binding]
      8 flags: [generated]
      9 info: |
     10    GeneratorDeclaration : function * ( FormalParameters ) { GeneratorBody }
     11 
     12        [...]
     13        2. Let F be GeneratorFunctionCreate(Normal, FormalParameters,
     14           GeneratorBody, 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 
     42    SingleNameBinding : BindingIdentifier Initializeropt
     43 
     44    [...]
     45    4. If iteratorRecord.[[done]] is false, then
     46       a. Let next be IteratorStep(iteratorRecord.[[iterator]]).
     47       b. If next is an abrupt completion, set iteratorRecord.[[done]] to true.
     48       c. ReturnIfAbrupt(next).
     49 
     50 ---*/
     51 var g = {};
     52 g[Symbol.iterator] = function() {
     53  return {
     54    next: function() {
     55      throw new Test262Error();
     56    }
     57  };
     58 };
     59 
     60 function* f([x]) {}
     61 
     62 assert.throws(Test262Error, function() {
     63  f(g);
     64 });
     65 
     66 reportCompare(0, 0);