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tvmet/xpr/Vector.h
- Committer:
- xiaxia686
- Date:
- 2013-04-12
- Revision:
- 46:adcd57a5e402
- Parent:
- 15:9c5aaeda36dc
File content as of revision 46:adcd57a5e402:
/* * 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 1.28 2007-06-23 15:59:00 opetzold Exp $ */ #ifndef TVMET_XPR_VECTOR_H #define TVMET_XPR_VECTOR_H #include <tvmet/meta/Vector.h> #include <tvmet/loop/Vector.h> namespace tvmet { /* forwards */ template <class T, std::size_t Sz> class Vector; /** * \class XprVector Vector.h "tvmet/xpr/Vector.h" * \brief Represents the expression for vectors at any node in the parse tree. * * Specifically, XprVector is the class that wraps the expression, and the * expression itself is represented by the template parameter E. The * class XprVector is known as an anonymizing expression wrapper because * it can hold any subexpression of arbitrary complexity, allowing * clients to work with any expression by holding on to it via the * wrapper, without having to know the name of the type object that * actually implements the expression. * \note leave the Ctors non-explicit to allow implicit type conversation. */ template<class E, std::size_t Sz> class XprVector : public TvmetBase< XprVector<E, Sz> > { XprVector(); XprVector& operator=(const XprVector&); public: typedef typename E::value_type value_type; public: /** Dimensions. */ enum { Size = Sz /**< The size of the vector. */ }; public: /** Complexity counter */ enum { ops_assign = Size, ops = E::ops, use_meta = ops_assign < TVMET_COMPLEXITY_V_ASSIGN_TRIGGER ? true : false }; public: /** Constructor. */ explicit XprVector(const E& e) : m_expr(e) { } /** Copy Constructor. Not explicit! */ #if defined(TVMET_OPTIMIZE_XPR_MANUAL_CCTOR) XprVector(const XprVector& e) : m_expr(e.m_expr) { } #endif /** const index operator for vectors. */ value_type operator()(std::size_t i) const { TVMET_RT_CONDITION(i < Size, "XprVector Bounce Violation") return m_expr(i); } /** const index operator for vectors. */ value_type operator[](std::size_t i) const { return this->operator()(i); } private: /** Wrapper for meta assign. */ template<class Dest, class Src, class Assign> static inline void do_assign(dispatch<true>, Dest& dest, const Src& src, const Assign& assign_fn) { meta::Vector<Size, 0>::assign(dest, src, assign_fn); } /** Wrapper for loop assign. */ template<class Dest, class Src, class Assign> static inline void do_assign(dispatch<false>, Dest& dest, const Src& src, const Assign& assign_fn) { loop::Vector<Size>::assign(dest, src, assign_fn); } public: /** assign this expression to Vector dest. */ template<class Dest, class Assign> void assign_to(Dest& dest, const Assign& assign_fn) const { /* here is a way for caching, since each complex 'Node' is of type XprVector. */ do_assign(dispatch<use_meta>(), dest, *this, assign_fn); } public: // debugging Xpr parse tree void print_xpr(std::ostream& os, std::size_t l=0) const { os << IndentLevel(l++) << "XprVector[" << (use_meta ? "M" : "L") << ", O=" << ops << "]<" << std::endl; m_expr.print_xpr(os, l); os << IndentLevel(l) << "Sz=" << Size << std::endl; os << IndentLevel(--l) << ">" << ((l != 0) ? "," : "") << std::endl; } private: const E m_expr; }; } // namespace tvmet #include <tvmet/Functional.h> #include <tvmet/xpr/BinOperator.h> #include <tvmet/xpr/UnOperator.h> #include <tvmet/xpr/Literal.h> #include <tvmet/xpr/VectorFunctions.h> #include <tvmet/xpr/VectorBinaryFunctions.h> #include <tvmet/xpr/VectorUnaryFunctions.h> #include <tvmet/xpr/VectorOperators.h> #include <tvmet/xpr/Eval.h> #endif // TVMET_XPR_VECTOR_H // Local Variables: // mode:C++ // tab-width:8 // End: