text: /*
   * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
   *
   * SPDX-License-Identifier: BSD-2-Clause
   */
  
  #pragma once
  
  #include <AK/Function.h>
  #include <LibJS/Runtime/Function.h>
  
  namespace JS {
  
  class NativeFunction : public Function {
      JS_OBJECT(NativeFunction, Function);
  
  public:
      static NativeFunction* create(GlobalObject&, const FlyString& name, AK::Function<Value(VM&, GlobalObject&)>);
  
      explicit NativeFunction(PropertyName const& name, AK::Function<Value(VM&, GlobalObject&)>, Object& prototype);
      virtual void initialize(GlobalObject&) override { }
      virtual ~NativeFunction() override;
  
      virtual Value call() override;
      virtual Value construct(Function& new_target) override;
  
      virtual const FlyString& name() const override { return m_name; };
      virtual bool has_constructor() const { return false; }
  
      virtual bool is_strict_mode() const override;
  
  protected:
      NativeFunction(PropertyName const& name, Object& prototype);
      explicit NativeFunction(Object& prototype);
  
  private:
      virtual DeclarativeEnvironmentRecord* create_environment_record() override final;
      virtual bool is_native_function() const final { return true; }
  
      FlyString m_name;
      AK::Function<Value(VM&, GlobalObject&)> m_native_function;
  };
  
  template<>
  inline bool Object::fast_is<NativeFunction>() const { return is_native_function(); }
  
  }
  