tor-browser

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private-gen-meth-static-obj-ptrn-id-init-skipped.js (3146B)

      1 // This file was procedurally generated from the following sources:
      2 // - src/dstr-binding/obj-ptrn-id-init-skipped.case
      3 // - src/dstr-binding/default/cls-expr-private-gen-meth-static.template
      4 /*---
      5 description: Destructuring initializer is not evaluated when value is not `undefined` (private static class expression generator method)
      6 esid: sec-class-definitions-runtime-semantics-evaluation
      7 features: [class, class-static-methods-private, generators, destructuring-binding]
      8 flags: [generated]
      9 info: |
     10    ClassExpression : class BindingIdentifieropt ClassTail
     11 
     12    1. If BindingIdentifieropt is not present, let className be undefined.
     13    2. Else, let className be StringValue of BindingIdentifier.
     14    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
     15       with argument className.
     16    [...]
     17 
     18    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
     19 
     20    21. For each ClassElement m in order from methods
     21        a. If IsStatic of m is false, then
     22        b. Else,
     23           Let status be the result of performing PropertyDefinitionEvaluation
     24           for m with arguments F and false.
     25    [...]
     26 
     27    14.4.13 Runtime Semantics: PropertyDefinitionEvaluation
     28 
     29    GeneratorMethod :
     30        * PropertyName ( StrictFormalParameters ) { GeneratorBody }
     31 
     32    1. Let propKey be the result of evaluating PropertyName.
     33    2. ReturnIfAbrupt(propKey).
     34    3. If the function code for this GeneratorMethod is strict mode code,
     35       let strict be true. Otherwise let strict be false.
     36    4. Let scope be the running execution context's LexicalEnvironment.
     37    5. Let closure be GeneratorFunctionCreate(Method,
     38       StrictFormalParameters, GeneratorBody, scope, strict).
     39 
     40    9.2.1 [[Call]] ( thisArgument, argumentsList)
     41 
     42    [...]
     43    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
     44    [...]
     45 
     46    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
     47 
     48    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
     49    [...]
     50 
     51    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
     52 
     53    [...]
     54    23. Let iteratorRecord be Record {[[iterator]]:
     55        CreateListIterator(argumentsList), [[done]]: false}.
     56    24. If hasDuplicates is true, then
     57        [...]
     58    25. Else,
     59        b. Let formalStatus be IteratorBindingInitialization for formals with
     60           iteratorRecord and env as arguments.
     61    [...]
     62 
     63    13.3.3.7 Runtime Semantics: KeyedBindingInitialization
     64 
     65    SingleNameBinding : BindingIdentifier Initializeropt
     66 
     67    [...]
     68    6. If Initializer is present and v is undefined, then
     69       [...]
     70    [...]
     71 ---*/
     72 var initCount = 0;
     73 function counter() {
     74  initCount += 1;
     75 }
     76 
     77 var callCount = 0;
     78 var C = class {
     79  static * #method({ w = counter(), x = counter(), y = counter(), z = counter() }) {
     80    assert.sameValue(w, null);
     81    assert.sameValue(x, 0);
     82    assert.sameValue(y, false);
     83    assert.sameValue(z, '');
     84    assert.sameValue(initCount, 0);
     85    callCount = callCount + 1;
     86  }
     87 
     88  static get method() {
     89    return this.#method;
     90  }
     91 };
     92 
     93 C.method({ w: null, x: 0, y: false, z: '' }).next();
     94 assert.sameValue(callCount, 1, 'method invoked exactly once');
     95 
     96 reportCompare(0, 0);