Tiny Vector Matrix library using Expression Templates

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include/tvmet/TvmetBase.h

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/*
 * Tiny Vector Matrix Library
 * Dense Vector Matrix Libary of Tiny size using Expression Templates
 *
 * Copyright (C) 2001 - 2007 Olaf Petzold <opetzold@users.sourceforge.net>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * $Id: TvmetBase.h,v 1.17 2007-06-23 15:58:58 opetzold Exp $
 */

#ifndef TVMET_BASE_H
#define TVMET_BASE_H

#include <iosfwd>       // io streams forward declaration
#include <typeinfo>       // rtti: used by Xpr.h level printing
#include <cmath>        // unary and binary math
#include <cstdlib>        // labs

#if defined(WIN32) && defined(_MSC_VER) && (_MSC_VER == 1310)
#include <string>       // operator<<(ostream) here defined
#endif

#if defined(__APPLE_CC__)
// Mac OS X builds seems to miss these functions inside cmath
extern "C" int isnan(double);
extern "C" int isinf(double);
#endif

namespace tvmet {


template<class E> class TvmetBase { };


class IndentLevel : public TvmetBase< IndentLevel >
{
public:
  IndentLevel(std::size_t level) : m_level(level) { }

  std::ostream& print_xpr(std::ostream& os) const {
    for(std::size_t i = 0; i != m_level; ++i) os << "   ";
    return os;
  }

private:
  std::size_t           m_level;
};


template<class E>
inline
std::ostream& operator<<(std::ostream& os, const TvmetBase<E>& e) {
  static_cast<const E&>(e).print_xpr(os);
  return os;
}


template<bool> struct dispatch;

template<> struct dispatch<true>  { };

template<> struct dispatch<false> { };


} // namespace tvmet

#endif // TVMET_BASE_H

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