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, 2002
00004 //  Free Software Foundation, Inc.
00005 //
00006 // This file is part of the GNU ISO C++ Library.  This library is free
00007 // software; you can redistribute it and/or modify it under the
00008 // terms of the GNU General Public License as published by the
00009 // Free Software Foundation; either version 2, or (at your option)
00010 // any later version.
00011 
00012 // This library is distributed in the hope that it will be useful,
00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015 // GNU General Public License for more details.
00016 
00017 // You should have received a copy of the GNU General Public License along
00018 // with this library; see the file COPYING.  If not, write to the Free
00019 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
00020 // USA.
00021 
00022 // As a special exception, you may use this file as part of a free software
00023 // library without restriction.  Specifically, if other files instantiate
00024 // templates or use macros or inline functions from this file, or you compile
00025 // this file and link it with other files to produce an executable, this
00026 // file does not by itself cause the resulting executable to be covered by
00027 // the GNU General Public License.  This exception does not however
00028 // invalidate any other reasons why the executable file might be covered by
00029 // the GNU General Public License.
00030 
00031 // Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
00032 
00033 /** @file indirect_array.h
00034  *  This is an internal header file, included by other library headers.
00035  *  You should not attempt to use it directly.
00036  */
00037 
00038 #ifndef _CPP_BITS_INDIRECT_ARRAY_H
00039 #define _CPP_BITS_INDIRECT_ARRAY_H 1
00040 
00041 #pragma GCC system_header
00042 
00043 namespace std
00044 {
00045   template <class _Tp>
00046      class indirect_array
00047      {
00048      public:
00049        typedef _Tp value_type;
00050 
00051        // XXX: This is a proposed resolution for DR-253.
00052        indirect_array& operator=(const indirect_array&);
00053        
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 valarray<_Tp>&) const; 
00065        void operator= (const _Tp&) const;
00066        //    ~indirect_array();
00067        
00068        template<class _Dom>
00069          void operator=(const _Expr<_Dom, _Tp>&) const;
00070        template<class _Dom>
00071          void operator*=(const _Expr<_Dom, _Tp>&) const;
00072        template<class _Dom>
00073          void operator/=(const _Expr<_Dom, _Tp>&) const;
00074        template<class _Dom>
00075          void operator%=(const _Expr<_Dom, _Tp>&) const;
00076        template<class _Dom>
00077          void operator+=(const _Expr<_Dom, _Tp>&) const;
00078        template<class _Dom>
00079          void operator-=(const _Expr<_Dom, _Tp>&) const;
00080        template<class _Dom>
00081          void operator^=(const _Expr<_Dom, _Tp>&) const;
00082        template<class _Dom>
00083          void operator&=(const _Expr<_Dom, _Tp>&) const;
00084        template<class _Dom>
00085          void operator|=(const _Expr<_Dom, _Tp>&) const;
00086        template<class _Dom>
00087          void operator<<=(const _Expr<_Dom, _Tp>&) const;
00088        template<class _Dom>
00089          void operator>>=(const _Expr<_Dom, _Tp>&) const; 
00090 
00091      private:
00092        indirect_array(const indirect_array&);
00093        indirect_array(_Array<_Tp>, size_t, _Array<size_t>);
00094 
00095        friend class valarray<_Tp>;
00096        friend class gslice_array<_Tp>;
00097        
00098        const size_t      _M_sz;
00099        const _Array<size_t> _M_index;
00100        const _Array<_Tp>     _M_array;
00101        
00102        // not implemented
00103        indirect_array();
00104      };
00105 
00106   template<typename _Tp>
00107     inline 
00108     indirect_array<_Tp>::indirect_array(const indirect_array<_Tp>& __a)
00109       : _M_sz(__a._M_sz), _M_index(__a._M_index), _M_array(__a._M_array) {}
00110 
00111   template<typename _Tp>
00112      inline
00113      indirect_array<_Tp>::indirect_array(_Array<_Tp> __a, size_t __s, 
00114                      _Array<size_t> __i)
00115        : _M_sz(__s), _M_index(__i), _M_array(__a) {}
00116 
00117   template<typename _Tp>
00118      inline indirect_array<_Tp>&
00119      indirect_array<_Tp>::operator=(const indirect_array<_Tp>& __a)
00120      {
00121        __valarray_copy(__a._M_array, _M_sz, __a._M_index, _M_array, _M_index);
00122        return *this;
00123      }
00124 
00125 
00126   template<typename _Tp>
00127      inline void
00128      indirect_array<_Tp>::operator=(const _Tp& __t) const
00129      { __valarray_fill(_M_array, _M_index, _M_sz, __t); }
00130 
00131   template<typename _Tp>
00132      inline void
00133      indirect_array<_Tp>::operator=(const valarray<_Tp>& __v) const
00134      { __valarray_copy(_Array<_Tp>(__v), _M_sz, _M_array, _M_index); }
00135 
00136   template<typename _Tp>
00137      template<class _Dom>
00138        inline void
00139        indirect_array<_Tp>::operator=(const _Expr<_Dom,_Tp>& __e) const
00140        { __valarray_copy(__e, _M_sz, _M_array, _M_index); }
00141 
00142 #undef _DEFINE_VALARRAY_OPERATOR
00143 #define _DEFINE_VALARRAY_OPERATOR(_Op, _Name)               \
00144   template<typename _Tp>                        \
00145     inline void                             \
00146     indirect_array<_Tp>::operator _Op##=(const valarray<_Tp>& __v) const\
00147     {                                   \
00148       _Array_augmented_##_Name(_M_array, _M_index, _Array<_Tp>(__v), _M_sz); \
00149     }                                   \
00150                                     \
00151   template<typename _Tp>                                                \
00152     template<class _Dom>                                \
00153       inline void                           \
00154       indirect_array<_Tp>::operator _Op##=(const _Expr<_Dom,_Tp>& __e) const\
00155       {                                 \
00156     _Array_augmented_##_Name(_M_array, _M_index, __e, _M_sz);   \
00157       }
00158 
00159 _DEFINE_VALARRAY_OPERATOR(*, __multiplies)
00160 _DEFINE_VALARRAY_OPERATOR(/, __divides)
00161 _DEFINE_VALARRAY_OPERATOR(%, __modulus)
00162 _DEFINE_VALARRAY_OPERATOR(+, __plus)
00163 _DEFINE_VALARRAY_OPERATOR(-, __minus)
00164 _DEFINE_VALARRAY_OPERATOR(^, __bitwise_xor)
00165 _DEFINE_VALARRAY_OPERATOR(&, __bitwise_and)
00166 _DEFINE_VALARRAY_OPERATOR(|, __bitwise_or)
00167 _DEFINE_VALARRAY_OPERATOR(<<, __shift_left)
00168 _DEFINE_VALARRAY_OPERATOR(>>, __shift_right)
00169 
00170 #undef _DEFINE_VALARRAY_OPERATOR
00171 
00172 } // std::
00173 
00174 #endif /* _CPP_BITS_INDIRECT_ARRAY_H */
00175 
00176 // Local Variables:
00177 // mode:c++
00178 // End:

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