text: // This file was procedurally generated from the following sources:
  // - src/dstr-binding/ary-ptrn-elem-id-iter-val-array-prototype.case
  // - src/dstr-binding/default/func-decl-dflt.template
  /*---
  description: Array destructuring uses overriden Array.prototype[Symbol.iterator] (function declaration (default parameter))
  esid: sec-function-definitions-runtime-semantics-instantiatefunctionobject
  features: [Symbol.iterator, generators, destructuring-binding, default-parameters]
  flags: [generated]
  info: |
      FunctionDeclaration :
          function BindingIdentifier ( FormalParameters ) { FunctionBody }
  
          [...]
          3. Let F be FunctionCreate(Normal, FormalParameters, FunctionBody,
             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.
      [...]
  
      Runtime Semantics: IteratorBindingInitialization
  
      SingleNameBinding : BindingIdentifier Initializer_opt
  
      1. Let bindingId be StringValue of BindingIdentifier.
      2. Let lhs be ? ResolveBinding(bindingId, environment).
      3. If iteratorRecord.[[Done]] is false, then
          a. Let next be IteratorStep(iteratorRecord).
          b. If next is an abrupt completion, set iteratorRecord.[[Done]] to true.
          c. ReturnIfAbrupt(next).
          d. If next is false, set iteratorRecord.[[Done]] to true.
          e. Else,
              i. Let v be IteratorValue(next).
              ii. If v is an abrupt completion, set iteratorRecord.[[Done]] to true.
              iii. ReturnIfAbrupt(v).
      [...]
      7. Return InitializeReferencedBinding(lhs, v).
  
  ---*/
  Array.prototype[Symbol.iterator] = function* () {
      if (this.length > 0) {
          yield this[0];
      }
      if (this.length > 1) {
          yield this[1];
      }
      if (this.length > 2) {
          yield 42;
      }
  };
  
  var callCount = 0;
  function f([x, y, z] = [1, 2, 3]) {
    assert.sameValue(x, 1);
    assert.sameValue(y, 2);
    assert.sameValue(z, 42);
    callCount = callCount + 1;
  };
  f();
  assert.sameValue(callCount, 1, 'function invoked exactly once');
  