JSTests/test262/test/language/expressions/object/dstr/gen-meth-ary-ptrn-rest-init-ary.js

// This file was procedurally generated from the following sources:
// - src/dstr-binding/ary-ptrn-rest-init-ary.case
// - src/dstr-binding/default/gen-meth.template
/*---
description: Rest element (nested array pattern) does not support initializer (generator method)
esid: sec-generator-function-definitions-runtime-semantics-propertydefinitionevaluation
features: [generators, destructuring-binding]
flags: [generated]
negative:
  phase: parse
  type: SyntaxError
info: |
    GeneratorMethod :
        * PropertyName ( StrictFormalParameters ) { GeneratorBody }

    1. Let propKey be the result of evaluating PropertyName.
    2. ReturnIfAbrupt(propKey).
    3. If the function code for this GeneratorMethod is strict mode code,
       let strict be true. Otherwise let strict be false.
    4. Let scope be the running execution context's LexicalEnvironment.
    5. Let closure be GeneratorFunctionCreate(Method,
       StrictFormalParameters, GeneratorBody, scope, strict).
    [...]

    9.2.1 [[Call]] ( thisArgument, argumentsList)

    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]

    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )

    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]

    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)

    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]

    13.3.3 Destructuring Binding Patterns
    ArrayBindingPattern[Yield] :
        [ Elisionopt BindingRestElement[?Yield]opt ]
        [ BindingElementList[?Yield] ]
        [ BindingElementList[?Yield] , Elisionopt BindingRestElement[?Yield]opt ]
---*/
$DONOTEVALUATE();

var callCount = 0;
var obj = {
  *method([...[ x ] = []]) {
    
    callCount = callCount + 1;
  }
};

obj.method([]).next();
assert.sameValue(callCount, 1, 'generator method invoked exactly once');