TvmetBase.h

00001 /*
00002  * Tiny Vector Matrix Library
00003  * Dense Vector Matrix Libary of Tiny size using Expression Templates
00004  *
00005  * Copyright (C) 2001 - 2007 Olaf Petzold <opetzold@users.sourceforge.net>
00006  *
00007  * This library is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * This library is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with this library; if not, write to the Free Software
00019  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00020  *
00021  * $Id: TvmetBase.h,v 1.17 2007-06-23 15:58:58 opetzold Exp $
00022  */
00023 
00024 #ifndef TVMET_BASE_H
00025 #define TVMET_BASE_H
00026 
00027 #include <iostream>//<iosfwd>                // io streams forward declaration
00028 #include <typeinfo>                // rtti: used by Xpr.h level printing
00029 #include <cmath>                // unary and binary math
00030 #include <cstdlib>                // labs
00031 
00032 #if defined(WIN32) && defined(_MSC_VER) && (_MSC_VER == 1310)
00033 #include <string>                // operator<<(ostream) here defined
00034 #endif
00035 
00036 #if defined(__APPLE_CC__)
00037 // Mac OS X builds seems to miss these functions inside cmath
00038 extern "C" int isnan(double);
00039 extern "C" int isinf(double);
00040 #endif
00041 
00042 namespace tvmet {
00043 
00044 
00045 /**
00046  * \class TvmetBase TvmetBase.h "tvmet/TvmetBase.h"
00047  * \brief Base class
00048  * Used for static polymorph call of print_xpr
00049  */
00050 template<class E> class TvmetBase { };
00051 
00052 
00053 /**
00054  * \class IndentLevel TvmetBase.h "tvmet/TvmetBase.h"
00055  * \brief Prints the level indent.
00056  */
00057 class IndentLevel : public TvmetBase< IndentLevel >
00058 {
00059 public:
00060   IndentLevel(std::size_t level) : m_level(level) { }
00061 
00062   std::ostream& print_xpr(std::ostream& os) const {
00063     for(std::size_t i = 0; i != m_level; ++i) os << "   ";
00064     return os;
00065   }
00066 
00067 private:
00068   std::size_t                     m_level;
00069 };
00070 
00071 
00072 /**
00073  * \fn operator<<(std::ostream& os, const TvmetBase<E>& e)
00074  * \brief overloaded ostream operator using static polymorphic.
00075  * \ingroup _binary_operator
00076  */
00077 template<class E>
00078 inline
00079 std::ostream& operator<<(std::ostream& os, const TvmetBase<E>& e) {
00080   static_cast<const E&>(e).print_xpr(os);
00081   return os;
00082 }
00083 
00084 
00085 /**
00086  * \class dispatch TvmetBase.h "tvmet/TvmetBase.h"
00087  * \brief Class helper to distuingish between e.g. meta
00088  *        and loop strategy used.
00089  */
00090 template<bool> struct dispatch;
00091 
00092 /**
00093  * \class dispatch<true> TvmetBase.h "tvmet/TvmetBase.h"
00094  * \brief specialized.
00095  */
00096 template<> struct dispatch<true>  { };
00097 
00098 /**
00099  * \class dispatch<false> TvmetBase.h "tvmet/TvmetBase.h"
00100  * \brief specialized.
00101  */
00102 template<> struct dispatch<false> { };
00103 
00104 
00105 } // namespace tvmet
00106 
00107 #endif // TVMET_BASE_H
00108 
00109 // Local Variables:
00110 // mode:C++
00111 // tab-width:8
00112 // End: