tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

obj-ptrn-rest-skip-non-enumerable.js (1929B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/obj-ptrn-rest-skip-non-enumerable.case
      3 // - src/dstr-binding/default/gen-func-expr.template
      4 /*---
      5 description: Rest object doesn't contain non-enumerable properties (generator function expression)
      6 esid: sec-generator-function-definitions-runtime-semantics-evaluation
      7 features: [object-rest, generators, destructuring-binding]
      8 flags: [generated]
      9 includes: [propertyHelper.js]
     10 info: |
     11    GeneratorExpression : function * ( FormalParameters ) { GeneratorBody }
     12 
     13        [...]
     14        3. Let closure be GeneratorFunctionCreate(Normal, FormalParameters,
     15           GeneratorBody, scope, strict).
     16        [...]
     17 
     18    9.2.1 [[Call]] ( thisArgument, argumentsList)
     19 
     20    [...]
     21    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     22    [...]
     23 
     24    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     25 
     26    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     27    [...]
     28 
     29    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     30 
     31    [...]
     32    23. Let iteratorRecord be Record {[[iterator]]:
     33        CreateListIterator(argumentsList), [[done]]: false}.
     34    24. If hasDuplicates is true, then
     35        [...]
     36    25. Else,
     37        b. Let formalStatus be IteratorBindingInitialization for formals with
     38           iteratorRecord and env as arguments.
     39    [...]
     40 ---*/
     41 var o = {a: 3, b: 4};
     42 Object.defineProperty(o, "x", { value: 4, enumerable: false });
     43 
     44 var callCount = 0;
     45 var f;
     46 f = function*({...rest}) {
     47  assert.sameValue(rest.x, undefined);
     48 
     49  verifyProperty(rest, "a", {
     50    enumerable: true,
     51    writable: true,
     52    configurable: true,
     53    value: 3
     54  });
     55 
     56  verifyProperty(rest, "b", {
     57    enumerable: true,
     58    writable: true,
     59    configurable: true,
     60    value: 4
     61  });
     62  callCount = callCount + 1;
     63 };
     64 
     65 f(o).next();
     66 assert.sameValue(callCount, 1, 'generator function invoked exactly once');
     67 
     68 reportCompare(0, 0);