Teuchos_getBaseObjVoidPtr.hpp

// @HEADER
// ***********************************************************************
//
//                    Teuchos: Common Tools Package
//                 Copyright (2004) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
// @HEADER
 
#ifndef TEUCHOS_GET_BASE_OBJ_VOID_PTR_HPP
#define TEUCHOS_GET_BASE_OBJ_VOID_PTR_HPP
 
 
#include "TeuchosCore_ConfigDefs.hpp"
#include "Teuchos_ConfigDefs.hpp"
 
 
#if defined(HAVE_TEUCHOSCORE_CXX11)
#  define HAS_TEUCHOS_GET_BASE_OBJ_VOID_PTR 1
#  include <type_traits>
#elif defined(HAVE_TEUCHOSCORE_BOOST) && defined(HAVE_TEUCHOSCORE_BOOST_IS_POLYMORPHIC)
#  define HAS_TEUCHOS_GET_BASE_OBJ_VOID_PTR 1
#  include <boost/type_traits/is_polymorphic.hpp>
#endif
 
 
namespace Teuchos {
 
 
#ifdef HAS_TEUCHOS_GET_BASE_OBJ_VOID_PTR
 
 
template<bool isPolymorphic, typename T>
class GetBaseObjVoidPtrImpl {};
 
template<typename T>
class GetBaseObjVoidPtrImpl<true, T> {
public:
  static const void* getBaseObjVoidPtr(T *p)
    {
      return dynamic_cast<const void*>(p);
    }
};
 
 
template<typename T>
class GetBaseObjVoidPtrImpl<false, T> {
public:
  static const void* getBaseObjVoidPtr(T *p)
    {
      return static_cast<const void*>(p);
    }
};
 

template<typename T>
const void* getBaseObjVoidPtr(T *p)
{
#if defined(HAVE_TEUCHOSCORE_CXX11)
  const bool isPoly = std::is_polymorphic<T>::value;
#elif defined(HAVE_TEUCHOSCORE_BOOST) && defined(HAVE_TEUCHOSCORE_BOOST_IS_POLYMORPHIC)
  const bool isPoly = boost::is_polymorphic<T>::value;
#endif
  typedef GetBaseObjVoidPtrImpl<isPoly, T> GBOVPT;
  return GBOVPT::getBaseObjVoidPtr(p);
}
 
 
#endif // HAS_TEUCHOS_GET_BASE_OBJ_VOID_PTR
 
 
} // end namespace Teuchos
 
 
#endif // TEUCHOS_GET_BASE_OBJ_VOID_PTR_HPP