Reference.hpp

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#ifndef OMG_DDS_CORE_REFERENCE_HPP_
#define OMG_DDS_CORE_REFERENCE_HPP_

/* Copyright 2010, Object Management Group, Inc.
 * Copyright 2010, PrismTech, Inc.
 * Copyright 2010, Real-Time Innovations, Inc.
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <dds/core/types.hpp>
#include <dds/core/refmacros.hpp>
#include <dds/core/Exception.hpp>


namespace dds { namespace core {


  template <typename DELEGATE>
  class Reference
  {
  public:
    DECLARE_TYPE_TRAITS(DELEGATE)

    
    explicit Reference(dds::core::null_type&);

  public:
    explicit Reference(const Reference& ref);

    template <typename D>
    explicit Reference(const Reference<D>& ref);

    explicit Reference(DELEGATE_T* p);

  public:
    ~Reference();

  public:
    operator DELEGATE_REF_T() const;

    template <typename R>
    bool operator==(const R& ref) const;

    template <typename R>
    bool operator!=(const R& ref) const;

    template <typename D>
    Reference& operator=(const Reference<D>& that);

    template <typename R>
    Reference& operator=(const R& rhs);

    Reference&
    operator=(const null_type);

    bool is_nil() const;

    bool
    operator==(const null_type) const;

    bool operator!=(const null_type nil) const;

  private:
    // -- disallow dynamic allocation for reference types
    void* operator new(size_t);



  public:
    const DELEGATE_REF_T& delegate() const;

    DELEGATE_REF_T& delegate();

    DELEGATE* operator->();

    const DELEGATE* operator->() const;

    operator DELEGATE_REF_T& ();

    operator const DELEGATE_REF_T& () const;

  protected:
    DELEGATE_REF_T impl_;
  };


} } /* namespace dds / namespace core */

template <class D> bool operator == (dds::core::null_type, const dds::core::Reference<D> & r);

template <class D> bool operator != (dds::core::null_type, const dds::core::Reference<D> & r);

#endif /* OMG_DDS_CORE_REFERENCE_HPP_ */