// -*- C++ -*-/*************************************************************************** * blitz/meta/sum.h      TinyVector sum metaprogram * * $Id: sum.h,v 1.6 2005/05/07 04:17:57 julianc Exp $ * * Copyright (C) 1997-2001 Todd Veldhuizen <tveldhui@oonumerics.org> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program 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 General Public License for more details. * * Suggestions:          blitz-dev@oonumerics.org * Bugs:                 blitz-bugs@oonumerics.org * * For more information, please see the Blitz++ Home Page: *    http://oonumerics.org/blitz/ * ***************************************************************************/#ifndef BZ_META_SUM_H#define BZ_META_SUM_H#ifndef BZ_METAPROG_H #include <blitz/meta/metaprog.h>#endifBZ_NAMESPACE(blitz)template<int N, int I>class _bz_meta_vectorSum {public:    static const int loopFlag = (I < N-1) ? 1 : 0;    template<typename T_expr1>    static inline _bz_typename T_expr1::T_numtype    f(const T_expr1& a)    {        return a[I] +            _bz_meta_vectorSum<loopFlag * N, loopFlag * (I+1)>::f(a);    }};template<>class _bz_meta_vectorSum<0,0> {public:    template<typename T_expr1>    static inline _bz_meta_nullOperand f(const T_expr1&)    { return _bz_meta_nullOperand(); }};BZ_NAMESPACE_END#endif // BZ_META_SUM_H