tor-browser

The Tor Browser
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meth-static-obj-ptrn-rest-skip-non-enumerable.js (2727B)

      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/cls-expr-meth-static.template
      4 /*---
      5 description: Rest object doesn't contain non-enumerable properties (static class expression method)
      6 esid: sec-class-definitions-runtime-semantics-evaluation
      7 features: [object-rest, destructuring-binding]
      8 flags: [generated]
      9 includes: [propertyHelper.js]
     10 info: |
     11    ClassExpression : class BindingIdentifieropt ClassTail
     12 
     13    1. If BindingIdentifieropt is not present, let className be undefined.
     14    2. Else, let className be StringValue of BindingIdentifier.
     15    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
     16       with argument className.
     17    [...]
     18 
     19    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
     20 
     21    21. For each ClassElement m in order from methods
     22        a. If IsStatic of m is false, then
     23        b. Else,
     24           Let status be the result of performing PropertyDefinitionEvaluation for
     25           m with arguments F and false.
     26    [...]
     27 
     28    14.3.8 Runtime Semantics: DefineMethod
     29 
     30    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
     31 
     32    [...]
     33    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
     34       scope, strict). If functionPrototype was passed as a parameter then pass its
     35       value as the functionPrototype optional argument of FunctionCreate.
     36    [...]
     37 
     38    9.2.1 [[Call]] ( thisArgument, argumentsList)
     39 
     40    [...]
     41    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     42    [...]
     43 
     44    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     45 
     46    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     47    [...]
     48 
     49    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     50 
     51    [...]
     52    23. Let iteratorRecord be Record {[[iterator]]:
     53        CreateListIterator(argumentsList), [[done]]: false}.
     54    24. If hasDuplicates is true, then
     55        [...]
     56    25. Else,
     57        b. Let formalStatus be IteratorBindingInitialization for formals with
     58           iteratorRecord and env as arguments.
     59    [...]
     60 ---*/
     61 var o = {a: 3, b: 4};
     62 Object.defineProperty(o, "x", { value: 4, enumerable: false });
     63 
     64 var callCount = 0;
     65 var C = class {
     66  static method({...rest}) {
     67    assert.sameValue(rest.x, undefined);
     68 
     69    verifyProperty(rest, "a", {
     70      enumerable: true,
     71      writable: true,
     72      configurable: true,
     73      value: 3
     74    });
     75 
     76    verifyProperty(rest, "b", {
     77      enumerable: true,
     78      writable: true,
     79      configurable: true,
     80      value: 4
     81    });
     82    callCount = callCount + 1;
     83  }
     84 };
     85 
     86 C.method(o);
     87 assert.sameValue(callCount, 1, 'method invoked exactly once');
     88 
     89 reportCompare(0, 0);