indirect_array.h

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00001 // The template and inlines for the -*- C++ -*- indirect_array class.
00002 
00003 // Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
00004 //
00005 // This file is part of the GNU ISO C++ Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the
00007 // terms of the GNU General Public License as published by the
00008 // Free Software Foundation; either version 2, or (at your option)
00009 // any later version.
00010 
00011 // This library is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014 // GNU General Public License for more details.
00015 
00016 // You should have received a copy of the GNU General Public License along
00017 // with this library; see the file COPYING.  If not, write to the Free
00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
00019 // USA.
00020 
00021 // As a special exception, you may use this file as part of a free software
00022 // library without restriction.  Specifically, if other files instantiate
00023 // templates or use macros or inline functions from this file, or you compile
00024 // this file and link it with other files to produce an executable, this
00025 // file does not by itself cause the resulting executable to be covered by
00026 // the GNU General Public License.  This exception does not however
00027 // invalidate any other reasons why the executable file might be covered by
00028 // the GNU General Public License.
00029 
00030 // Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
00031 
00037 #ifndef _CPP_BITS_INDIRECT_ARRAY_H
00038 #define _CPP_BITS_INDIRECT_ARRAY_H 1
00039 
00040 #pragma GCC system_header
00041 
00042 namespace std
00043 {
00044   template <class _Tp>
00045      class indirect_array
00046      {
00047      public:
00048        typedef _Tp value_type;
00049 
00050        // XXX: This is a proposed resolution for DR-253.
00051        indirect_array& operator= (const indirect_array&);
00052 
00053        void operator=  (const valarray<_Tp>&) const;
00054        void operator*= (const valarray<_Tp>&) const;
00055        void operator/= (const valarray<_Tp>&) const;
00056        void operator%= (const valarray<_Tp>&) const; 
00057        void operator+= (const valarray<_Tp>&) const;
00058        void operator-= (const valarray<_Tp>&) const;  
00059        void operator^= (const valarray<_Tp>&) const;
00060        void operator&= (const valarray<_Tp>&) const;
00061        void operator|= (const valarray<_Tp>&) const;
00062        void operator<<= (const valarray<_Tp>&) const;
00063        void operator>>= (const valarray<_Tp>&) const; 
00064        void operator= (const _Tp&);
00065        //    ~indirect_array();
00066 
00067        template<class _Dom>
00068        void operator=  (const _Expr<_Dom, _Tp>&) const;
00069        template<class _Dom>
00070        void operator*= (const _Expr<_Dom, _Tp>&) const;
00071        template<class _Dom>
00072        void operator/= (const _Expr<_Dom, _Tp>&) const;
00073        template<class _Dom>
00074        void operator%= (const _Expr<_Dom, _Tp>&) const;
00075        template<class _Dom>
00076        void operator+= (const _Expr<_Dom, _Tp>&) const;
00077        template<class _Dom>
00078        void operator-= (const _Expr<_Dom, _Tp>&) const;
00079        template<class _Dom>
00080        void operator^= (const _Expr<_Dom, _Tp>&) const;
00081        template<class _Dom>
00082        void operator&= (const _Expr<_Dom, _Tp>&) const;
00083        template<class _Dom>
00084        void operator|= (const _Expr<_Dom, _Tp>&) const;
00085        template<class _Dom>
00086        void operator<<= (const _Expr<_Dom, _Tp>&) const;
00087        template<class _Dom>
00088        void operator>>= (const _Expr<_Dom, _Tp>&) const; 
00089 
00090      private:
00091        indirect_array (const indirect_array&);
00092        indirect_array (_Array<_Tp>, size_t, _Array<size_t>);
00093 
00094        friend class valarray<_Tp>;
00095        friend class gslice_array<_Tp>;
00096 
00097        const size_t      _M_sz;
00098        const _Array<size_t> _M_index;
00099        const _Array<_Tp>     _M_array;
00100 
00101        // not implemented
00102        indirect_array ();
00103      };
00104 
00105   template<typename _Tp>
00106   inline indirect_array<_Tp>::indirect_array(const indirect_array<_Tp>& __a)
00107           : _M_sz (__a._M_sz), _M_index (__a._M_index),
00108             _M_array (__a._M_array) {}
00109 
00110   template<typename _Tp>
00111      inline
00112      indirect_array<_Tp>::indirect_array (_Array<_Tp> __a, size_t __s, 
00113                                           _Array<size_t> __i)
00114              : _M_sz (__s), _M_index (__i), _M_array (__a) {}
00115 
00116   template<typename _Tp>
00117      inline indirect_array<_Tp>&
00118      indirect_array<_Tp>::operator=(const indirect_array<_Tp>& __a)
00119      {
00120        __valarray_copy(__a._M_array, _M_sz, __a._M_index, _M_array, _M_index);
00121        return *this;
00122      }
00123 
00124 
00125   template<typename _Tp>
00126      inline void
00127      indirect_array<_Tp>::operator= (const _Tp& __t)
00128      { __valarray_fill(_M_array, _M_index, _M_sz, __t); }
00129 
00130   template<typename _Tp>
00131      inline void
00132      indirect_array<_Tp>::operator= (const valarray<_Tp>& __v) const
00133      { __valarray_copy (_Array<_Tp> (__v), _M_sz, _M_array, _M_index); }
00134 
00135   template<typename _Tp>
00136      template<class _Dom>
00137      inline void
00138      indirect_array<_Tp>::operator= (const _Expr<_Dom,_Tp>& __e) const
00139      { __valarray_copy (__e, _M_sz, _M_array, _M_index); }
00140 
00141 #undef _DEFINE_VALARRAY_OPERATOR
00142 #define _DEFINE_VALARRAY_OPERATOR(op, name)             \
00143 template<typename _Tp>                          \
00144 inline void                             \
00145 indirect_array<_Tp>::operator op##= (const valarray<_Tp>& __v) const    \
00146 {                                   \
00147   _Array_augmented_##name (_M_array, _M_index, _Array<_Tp> (__v), _M_sz); \
00148 }                                   \
00149                                     \
00150 template<typename _Tp> template<class _Dom>             \
00151 inline void                             \
00152 indirect_array<_Tp>::operator op##= (const _Expr<_Dom,_Tp>& __e) const \
00153 {                                   \
00154   _Array_augmented_##name (_M_array, _M_index, __e, _M_sz);     \
00155 }
00156 
00157 _DEFINE_VALARRAY_OPERATOR(*, multiplies)
00158 _DEFINE_VALARRAY_OPERATOR(/, divides)
00159 _DEFINE_VALARRAY_OPERATOR(%, modulus)
00160 _DEFINE_VALARRAY_OPERATOR(+, plus)
00161 _DEFINE_VALARRAY_OPERATOR(-, minus)
00162 _DEFINE_VALARRAY_OPERATOR(^, xor)
00163 _DEFINE_VALARRAY_OPERATOR(&, and)
00164 _DEFINE_VALARRAY_OPERATOR(|, or)
00165 _DEFINE_VALARRAY_OPERATOR(<<, shift_left)
00166 _DEFINE_VALARRAY_OPERATOR(>>, shift_right)
00167 
00168 #undef _DEFINE_VALARRAY_OPERATOR
00169 
00170 } // std::
00171 
00172 #endif /* _CPP_BITS_INDIRECT_ARRAY_H */
00173 
00174 // Local Variables:
00175 // mode:c++
00176 // End:

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