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async-private-gen-meth-dflt-ary-ptrn-rest-not-final-id.js (2318B)

      1 // |reftest| error:SyntaxError
      2 // This file was procedurally generated from the following sources:
      3 // - src/dstr-binding/ary-ptrn-rest-not-final-id.case
      4 // - src/dstr-binding/default/cls-decl-async-private-gen-meth-dflt.template
      5 /*---
      6 description: Rest element (identifier) may not be followed by any element (private class expression async generator method (default parameters))
      7 esid: sec-class-definitions-runtime-semantics-evaluation
      8 features: [class, class-methods-private, async-iteration]
      9 flags: [generated]
     10 negative:
     11  phase: parse
     12  type: SyntaxError
     13 info: |
     14    ClassDeclaration : class BindingIdentifier ClassTail
     15 
     16    1. Let className be StringValue of BindingIdentifier.
     17    2. Let value be the result of ClassDefinitionEvaluation of ClassTail with
     18       argument className.
     19    [...]
     20 
     21    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
     22 
     23    21. For each ClassElement m in order from methods
     24        a. If IsStatic of m is false, then
     25           i. Let status be the result of performing
     26              PropertyDefinitionEvaluation for m with arguments proto and
     27              false.
     28        [...]
     29 
     30    Runtime Semantics: PropertyDefinitionEvaluation
     31 
     32    AsyncGeneratorMethod :
     33        async [no LineTerminator here] * PropertyName ( UniqueFormalParameters )
     34            { AsyncGeneratorBody }
     35 
     36    1. Let propKey be the result of evaluating PropertyName.
     37    2. ReturnIfAbrupt(propKey).
     38    3. If the function code for this AsyncGeneratorMethod is strict mode code, let strict be true.
     39       Otherwise let strict be false.
     40    4. Let scope be the running execution context's LexicalEnvironment.
     41    5. Let closure be ! AsyncGeneratorFunctionCreate(Method, UniqueFormalParameters,
     42       AsyncGeneratorBody, scope, strict).
     43    [...]
     44 
     45 
     46    13.3.3 Destructuring Binding Patterns
     47    ArrayBindingPattern[Yield] :
     48        [ Elisionopt BindingRestElement[?Yield]opt ]
     49        [ BindingElementList[?Yield] ]
     50        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
     51 ---*/
     52 $DONOTEVALUATE();
     53 
     54 
     55 var callCount = 0;
     56 class C {
     57  async * #method([...x, y] = [1, 2, 3]) {
     58    
     59    callCount = callCount + 1;
     60  }
     61 
     62  get method() {
     63    return this.#method;
     64  }
     65 };
     66 
     67 new C().method().next().then(() => {
     68    assert.sameValue(callCount, 1, 'invoked exactly once');    
     69 }).then($DONE, $DONE);