tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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dflt-obj-ptrn-rest-skip-non-enumerable.js (1875B)

      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/arrow-function-dflt.template
      4 /*---
      5 description: Rest object doesn't contain non-enumerable properties (arrow function expression (default parameter))
      6 esid: sec-arrow-function-definitions-runtime-semantics-evaluation
      7 features: [object-rest, destructuring-binding, default-parameters]
      8 flags: [generated]
      9 includes: [propertyHelper.js]
     10 info: |
     11    ArrowFunction : ArrowParameters => ConciseBody
     12 
     13    [...]
     14    4. Let closure be FunctionCreate(Arrow, parameters, ConciseBody, 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 var o = {a: 3, b: 4};
     41 Object.defineProperty(o, "x", { value: 4, enumerable: false });
     42 
     43 var callCount = 0;
     44 var f;
     45 f = ({...rest} = o) => {
     46  assert.sameValue(rest.x, undefined);
     47 
     48  verifyProperty(rest, "a", {
     49    enumerable: true,
     50    writable: true,
     51    configurable: true,
     52    value: 3
     53  });
     54 
     55  verifyProperty(rest, "b", {
     56    enumerable: true,
     57    writable: true,
     58    configurable: true,
     59    value: 4
     60  });
     61  callCount = callCount + 1;
     62 };
     63 
     64 f();
     65 assert.sameValue(callCount, 1, 'arrow function invoked exactly once');
     66 
     67 reportCompare(0, 0);