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tvmet/meta/Vector.h
- Committer:
- madcowswe
- Date:
- 2013-04-17
- Revision:
- 90:e4164bb8c60e
- Parent:
- 15:9c5aaeda36dc
File content as of revision 90:e4164bb8c60e:
/* * 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: Vector.h,v 1.24 2007-06-23 15:58:59 opetzold Exp $ */ #ifndef TVMET_META_VECTOR_H #define TVMET_META_VECTOR_H #include <tvmet/NumericTraits.h> #include <tvmet/xpr/Null.h> namespace tvmet { /* forwards */ template<class T, std::size_t Sz> class Vector; namespace meta { /** * \class Vector Vector.h "tvmet/meta/Vector.h" * \brief Meta %Vector class using expression templates */ template<std::size_t Sz, std::size_t K=0> class Vector { Vector(); Vector(const Vector&); Vector& operator=(const Vector&); private: enum { doIt = (K < (Sz-1)) ? 1 : 0 /**< recursive counter */ }; public: /** assign an expression expr using the functional assign_fn. */ template <class Dest, class Src, class Assign> static inline void assign(Dest& lhs, const Src& rhs, const Assign& assign_fn) { assign_fn.apply_on(lhs(K), rhs(K)); meta::Vector<Sz * doIt, (K+1) * doIt>::assign(lhs, rhs, assign_fn); } /** build the sum of the vector. */ template<class E> static inline typename E::value_type sum(const E& e) { return e(K) + meta::Vector<Sz * doIt, (K+1) * doIt>::sum(e); } /** build the product of the vector. */ template<class E> static inline typename NumericTraits< typename E::value_type >::sum_type product(const E& e) { return e(K) * meta::Vector<Sz * doIt, (K+1) * doIt>::product(e); } /** build the dot product of the vector. */ template<class Dest, class Src> static inline typename PromoteTraits< typename Dest::value_type, typename Src::value_type >::value_type dot(const Dest& lhs, const Src& rhs) { return lhs(K) * rhs(K) + meta::Vector<Sz * doIt, (K+1) * doIt>::dot(lhs, rhs); } /** check for all elements */ template<class E> static inline bool all_elements(const E& e) { if(!e(K)) return false; return meta::Vector<Sz * doIt, (K+1) * doIt>::all_elements(e); } /** check for any elements */ template<class E> static inline bool any_elements(const E& e) { if(e(K)) return true; return meta::Vector<Sz * doIt, (K+1) * doIt>::any_elements(e); } }; /** * \class Vector<0,0> Vector.h "tvmet/meta/Vector.h" * \brief Meta %Vector Specialized for recursion */ template<> class Vector<0,0> { Vector(); Vector(const Vector&); Vector& operator=(const Vector&); public: template <class Dest, class Src, class Assign> static inline void assign(Dest&, const Src&, const Assign&) { } template<class E> static inline XprNull sum(const E&) { return XprNull(); } template<class E> static inline XprNull product(const E&) { return XprNull(); } template<class Dest, class Src> static inline XprNull dot(const Dest&, const Src&) { return XprNull(); } template<class E> static inline bool all_elements(const E&) { return true; } template<class E> static inline bool any_elements(const E&) { return false; } }; } // namespace meta } // namespace tvmet #endif /* TVMET_META_VECTOR_H */ // Local Variables: // mode:C++ // tab-width:8 // End: