Base.hpp

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00001 // Copyright (C) 2010 NICTA and the authors listed below
00002 // http://nicta.com.au
00003 // 
00004 // Authors:
00005 // - Conrad Sanderson (conradsand at ieee dot org)
00006 // 
00007 // This file is part of the Armadillo C++ library.
00008 // It is provided without any warranty of fitness
00009 // for any purpose. You can redistribute this file
00010 // and/or modify it under the terms of the GNU
00011 // Lesser General Public License (LGPL) as published
00012 // by the Free Software Foundation, either version 3
00013 // of the License or (at your option) any later version.
00014 // (see http://www.opensource.org/licenses for more info)
00015 
00016 
00017 //! \addtogroup Base
00018 //! @{
00019 
00020 
00021 
00022 //! Class for static polymorphism, modelled after the "Curiously Recurring Template Pattern" (CRTP).
00023 //! Used for type-safe downcasting in functions that restrict their input(s) to be classes that are
00024 //! derived from Base (e.g. Mat, Op, Glue, diagview, subview).
00025 //! A Base object can be converted to a Mat object by the unwrap class.
00026 
00027 template<typename elem_type, typename derived>
00028 struct Base
00029   {
00030   
00031   arma_inline
00032   const derived&
00033   get_ref() const
00034     {
00035     return static_cast<const derived&>(*this);
00036     }
00037 
00038   };
00039 
00040 
00041 
00042 template<typename elem_type, typename derived>
00043 struct BaseVec
00044   {
00045   
00046   arma_inline
00047   const derived&
00048   get_ref() const
00049     {
00050     return static_cast<const derived&>(*this);
00051     }
00052 
00053   };
00054 
00055 
00056 
00057 //! @}