indirect_array.h revision 117397 
1// The template and inlines for the -*- C++ -*- indirect_array class.
2
3// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
4//  Free Software Foundation, Inc.
5//
6// This file is part of the GNU ISO C++ Library.  This library is free
7// software; you can redistribute it and/or modify it under the
8// terms of the GNU General Public License as published by the
9// Free Software Foundation; either version 2, or (at your option)
10// any later version.
11
12// This library is distributed in the hope that it will be useful,
13// but WITHOUT ANY WARRANTY; without even the implied warranty of
14// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15// GNU General Public License for more details.
16
17// You should have received a copy of the GNU General Public License along
18// with this library; see the file COPYING.  If not, write to the Free
19// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
20// USA.
21
22// As a special exception, you may use this file as part of a free software
23// library without restriction.  Specifically, if other files instantiate
24// templates or use macros or inline functions from this file, or you compile
25// this file and link it with other files to produce an executable, this
26// file does not by itself cause the resulting executable to be covered by
27// the GNU General Public License.  This exception does not however
28// invalidate any other reasons why the executable file might be covered by
29// the GNU General Public License.
30
31// Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
32
33/** @file indirect_array.h
34 *  This is an internal header file, included by other library headers.
35 *  You should not attempt to use it directly.
36 */
37
38#ifndef _CPP_BITS_INDIRECT_ARRAY_H
39#define _CPP_BITS_INDIRECT_ARRAY_H 1
40
41#pragma GCC system_header
42
43namespace std
44{
45  template <class _Tp>
46     class indirect_array
47     {
48     public:
49       typedef _Tp value_type;
50
51       // XXX: This is a proposed resolution for DR-253.
52       indirect_array& operator=(const indirect_array&);
53
54       void operator=(const valarray<_Tp>&) const;
55       void operator*=(const valarray<_Tp>&) const;
56       void operator/=(const valarray<_Tp>&) const;
57       void operator%=(const valarray<_Tp>&) const;
58       void operator+=(const valarray<_Tp>&) const;
59       void operator-=(const valarray<_Tp>&) const;
60       void operator^=(const valarray<_Tp>&) const;
61       void operator&=(const valarray<_Tp>&) const;
62       void operator|=(const valarray<_Tp>&) const;
63       void operator<<=(const valarray<_Tp>&) const;
64       void operator>>=(const valarray<_Tp>&) const;
65       void operator= (const _Tp&) const;
66       //    ~indirect_array();
67
68       template<class _Dom>
69         void operator=(const _Expr<_Dom, _Tp>&) const;
70       template<class _Dom>
71         void operator*=(const _Expr<_Dom, _Tp>&) const;
72       template<class _Dom>
73         void operator/=(const _Expr<_Dom, _Tp>&) const;
74       template<class _Dom>
75         void operator%=(const _Expr<_Dom, _Tp>&) const;
76       template<class _Dom>
77         void operator+=(const _Expr<_Dom, _Tp>&) const;
78       template<class _Dom>
79         void operator-=(const _Expr<_Dom, _Tp>&) const;
80       template<class _Dom>
81         void operator^=(const _Expr<_Dom, _Tp>&) const;
82       template<class _Dom>
83         void operator&=(const _Expr<_Dom, _Tp>&) const;
84       template<class _Dom>
85         void operator|=(const _Expr<_Dom, _Tp>&) const;
86       template<class _Dom>
87         void operator<<=(const _Expr<_Dom, _Tp>&) const;
88       template<class _Dom>
89         void operator>>=(const _Expr<_Dom, _Tp>&) const;
90
91     private:
92       indirect_array(const indirect_array&);
93       indirect_array(_Array<_Tp>, size_t, _Array<size_t>);
94
95       friend class valarray<_Tp>;
96       friend class gslice_array<_Tp>;
97
98       const size_t 	 _M_sz;
99       const _Array<size_t> _M_index;
100       const _Array<_Tp> 	 _M_array;
101
102       // not implemented
103       indirect_array();
104     };
105
106  template<typename _Tp>
107    inline
108    indirect_array<_Tp>::indirect_array(const indirect_array<_Tp>& __a)
109      : _M_sz(__a._M_sz), _M_index(__a._M_index), _M_array(__a._M_array) {}
110
111  template<typename _Tp>
112     inline
113     indirect_array<_Tp>::indirect_array(_Array<_Tp> __a, size_t __s,
114					 _Array<size_t> __i)
115       : _M_sz(__s), _M_index(__i), _M_array(__a) {}
116
117  template<typename _Tp>
118     inline indirect_array<_Tp>&
119     indirect_array<_Tp>::operator=(const indirect_array<_Tp>& __a)
120     {
121       __valarray_copy(__a._M_array, _M_sz, __a._M_index, _M_array, _M_index);
122       return *this;
123     }
124
125
126  template<typename _Tp>
127     inline void
128     indirect_array<_Tp>::operator=(const _Tp& __t) const
129     { __valarray_fill(_M_array, _M_index, _M_sz, __t); }
130
131  template<typename _Tp>
132     inline void
133     indirect_array<_Tp>::operator=(const valarray<_Tp>& __v) const
134     { __valarray_copy(_Array<_Tp>(__v), _M_sz, _M_array, _M_index); }
135
136  template<typename _Tp>
137     template<class _Dom>
138       inline void
139       indirect_array<_Tp>::operator=(const _Expr<_Dom,_Tp>& __e) const
140       { __valarray_copy(__e, _M_sz, _M_array, _M_index); }
141
142#undef _DEFINE_VALARRAY_OPERATOR
143#define _DEFINE_VALARRAY_OPERATOR(_Op, _Name)				\
144  template<typename _Tp>						\
145    inline void								\
146    indirect_array<_Tp>::operator _Op##=(const valarray<_Tp>& __v) const\
147    {									\
148      _Array_augmented_##_Name(_M_array, _M_index, _Array<_Tp>(__v), _M_sz); \
149    }									\
150									\
151  template<typename _Tp>                                                \
152    template<class _Dom>				                \
153      inline void							\
154      indirect_array<_Tp>::operator _Op##=(const _Expr<_Dom,_Tp>& __e) const\
155      {									\
156	_Array_augmented_##_Name(_M_array, _M_index, __e, _M_sz);	\
157      }
158
159_DEFINE_VALARRAY_OPERATOR(*, __multiplies)
160_DEFINE_VALARRAY_OPERATOR(/, __divides)
161_DEFINE_VALARRAY_OPERATOR(%, __modulus)
162_DEFINE_VALARRAY_OPERATOR(+, __plus)
163_DEFINE_VALARRAY_OPERATOR(-, __minus)
164_DEFINE_VALARRAY_OPERATOR(^, __bitwise_xor)
165_DEFINE_VALARRAY_OPERATOR(&, __bitwise_and)
166_DEFINE_VALARRAY_OPERATOR(|, __bitwise_or)
167_DEFINE_VALARRAY_OPERATOR(<<, __shift_left)
168_DEFINE_VALARRAY_OPERATOR(>>, __shift_right)
169
170#undef _DEFINE_VALARRAY_OPERATOR
171
172} // std::
173
174#endif /* _CPP_BITS_INDIRECT_ARRAY_H */
175
176// Local Variables:
177// mode:c++
178// End:
179