00001 // @HEADER 00002 // *********************************************************************** 00003 // 00004 // Teuchos: Common Tools Package 00005 // Copyright (2004) Sandia Corporation 00006 // 00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive 00008 // license for use of this work by or on behalf of the U.S. Government. 00009 // 00010 // This library is free software; you can redistribute it and/or modify 00011 // it under the terms of the GNU Lesser General Public License as 00012 // published by the Free Software Foundation; either version 2.1 of the 00013 // License, or (at your option) any later version. 00014 // 00015 // This library is distributed in the hope that it will be useful, but 00016 // WITHOUT ANY WARRANTY; without even the implied warranty of 00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00018 // Lesser General Public License for more details. 00019 // 00020 // You should have received a copy of the GNU Lesser General Public 00021 // License along with this library; if not, write to the Free Software 00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 00023 // USA 00024 // Questions? Contact Michael A. Heroux (maherou@sandia.gov) 00025 // 00026 // *********************************************************************** 00027 // @HEADER 00028 00029 #ifndef TEUCHOS_DYN_CAST_HPP 00030 #define TEUCHOS_DYN_CAST_HPP 00031 00032 #include "Teuchos_TypeNameTraits.hpp" 00033 00034 namespace Teuchos { 00035 00044 class m_bad_cast : public std::bad_cast { 00045 std::string msg; 00046 public: 00047 explicit m_bad_cast(const std::string& what_arg ) : msg(what_arg) {} 00048 virtual ~m_bad_cast() throw() {} 00049 virtual const char* what() const throw() { return msg.data(); } 00050 }; 00051 00052 // Throw the std::exception <tt>std::invalid_argument</tt> for below functions 00053 void dyn_cast_throw_exception( 00054 const std::string &type_from_name 00055 ,const std::string &type_from_concr_name 00056 ,const std::string &type_to_name 00057 ); 00058 00153 template <class T_To, class T_From> 00154 inline 00155 T_To& dyn_cast(T_From &from) 00156 { 00157 T_To *to_ = dynamic_cast<T_To*>(&from); 00158 if(!to_) 00159 dyn_cast_throw_exception( 00160 TypeNameTraits<T_From>::name() 00161 ,typeName(from) 00162 ,TypeNameTraits<T_To>::name() 00163 ); 00164 return *to_; 00165 } 00166 00167 } // namespace Teuchos 00168 00169 #endif // TEUCHOS_DYN_CAST_HPP