CompositeJoiner.hpp

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#ifndef DART_COMMON_COMPOSITEJOINER_HPP_
#define DART_COMMON_COMPOSITEJOINER_HPP_

#include "dart/common/Composite.hpp"
#include "dart/common/Empty.hpp"

namespace dart {
namespace common {

template <class... OtherBases>
class CompositeJoiner
{
public:
  virtual ~CompositeJoiner() = default;
};

template <class Base1>
class CompositeJoiner<Base1> : public Base1
{
public:
  virtual ~CompositeJoiner() = default;
};

template <class Base1, class Base2>
class CompositeJoiner<Base1, Base2> : public Base1, public Base2
{
public:
  CompositeJoiner() = default;

  virtual ~CompositeJoiner() = default;

  //
  // TODO(MXG): When we migrate to using C++14, we can use std::tuple and
  // std::index_sequence (which is only available in C++14) to dispatch
  // arbitrarily many arguments to the constructors of each base class. Until
  // then, this is the best we can offer due to fundamental limitations of
  // variadic templates in C++11.
  template <typename Base1Arg, typename... Base2Args>
  CompositeJoiner(Base1Arg&& arg1, Base2Args&&... args2);

  template <typename Base1Arg>
  CompositeJoiner(Base1Arg&& arg1, NoArgTag);

  template <typename... Base2Args>
  CompositeJoiner(NoArgTag, Base2Args&&... args2);

  // Documentation inherited
  template <class T>
  bool has() const;

  // Documentation inherited
  template <class T>
  T* get();

  // Documentation inherited
  template <class T>
  const T* get() const;

  // Documentation inherited
  template <class T>
  void set(const T* aspect);

  // Documentation inherited
  template <class T>
  void set(std::unique_ptr<T>&& aspect);

  // Documentation inherited
  template <class T, typename... Args>
  T* createAspect(Args&&... args);

  // Documentation inherited
  template <class T>
  void removeAspect();

  // Documentation inherited
  template <class T>
  std::unique_ptr<T> releaseAspect();

  // Documentation inherited
  template <class T>
  static constexpr bool isSpecializedFor();
};

template <class Base1, class Base2, class... OtherBases>
class CompositeJoiner<Base1, Base2, OtherBases...>
  : public CompositeJoiner<Base1, CompositeJoiner<Base2, OtherBases...> >
{
public:
  CompositeJoiner() = default;

  //
  // TODO(MXG): When we migrate to using C++14, we can use std::tuple and
  // std::index_sequence (which is only available in C++14) to dispatch
  // arbitrarily many arguments to the constructors of each base class. Until
  // then, this is the best we can offer due to fundamental limitations of
  // variadic templates in C++11.
  template <typename... Args>
  CompositeJoiner(Args&&... args);

  virtual ~CompositeJoiner() = default;
};

} // namespace common
} // namespace dart

#include "dart/common/detail/CompositeJoiner.hpp"

#endif // DART_COMMON_COMPOSITEJOINER_HPP_