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 //! @}