diff options
Diffstat (limited to 'contrib/libstdc++/include/bits/gslice_array.h')
| -rw-r--r-- | contrib/libstdc++/include/bits/gslice_array.h | 92 |
1 files changed, 67 insertions, 25 deletions
diff --git a/contrib/libstdc++/include/bits/gslice_array.h b/contrib/libstdc++/include/bits/gslice_array.h index 1116e9c7e97df..7e2e6848e8839 100644 --- a/contrib/libstdc++/include/bits/gslice_array.h +++ b/contrib/libstdc++/include/bits/gslice_array.h @@ -1,6 +1,7 @@ // The template and inlines for the -*- C++ -*- gslice_array class. -// Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. +// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2004 +// Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the @@ -34,30 +35,65 @@ * You should not attempt to use it directly. */ -#ifndef _CPP_BITS_GSLICE_ARRAY -#define _CPP_BITS_GSLICE_ARRAY 1 +#ifndef _GSLICE_ARRAY_H +#define _GSLICE_ARRAY_H 1 #pragma GCC system_header namespace std { + /** + * @brief Reference to multi-dimensional subset of an array. + * + * A gslice_array is a reference to the actual elements of an array + * specified by a gslice. The way to get a gslice_array is to call + * operator[](gslice) on a valarray. The returned gslice_array then + * permits carrying operations out on the referenced subset of elements in + * the original valarray. For example, operator+=(valarray) will add + * values to the subset of elements in the underlying valarray this + * gslice_array refers to. + * + * @param Tp Element type. + */ template<typename _Tp> class gslice_array { public: typedef _Tp value_type; + // _GLIBCXX_RESOLVE_LIB_DEFECTS + // 253. valarray helper functions are almost entirely useless + + /// Copy constructor. Both slices refer to the same underlying array. + gslice_array(const gslice_array&); + + /// Assignment operator. Assigns slice elements to corresponding + /// elements of @a a. + gslice_array& operator=(const gslice_array&); + + /// Assign slice elements to corresponding elements of @a v. void operator=(const valarray<_Tp>&) const; + /// Multiply slice elements by corresponding elements of @a v. void operator*=(const valarray<_Tp>&) const; + /// Divide slice elements by corresponding elements of @a v. void operator/=(const valarray<_Tp>&) const; + /// Modulo slice elements by corresponding elements of @a v. void operator%=(const valarray<_Tp>&) const; + /// Add corresponding elements of @a v to slice elements. void operator+=(const valarray<_Tp>&) const; + /// Subtract corresponding elements of @a v from slice elements. void operator-=(const valarray<_Tp>&) const; + /// Logical xor slice elements with corresponding elements of @a v. void operator^=(const valarray<_Tp>&) const; + /// Logical and slice elements with corresponding elements of @a v. void operator&=(const valarray<_Tp>&) const; + /// Logical or slice elements with corresponding elements of @a v. void operator|=(const valarray<_Tp>&) const; + /// Left shift slice elements by corresponding elements of @a v. void operator<<=(const valarray<_Tp>&) const; + /// Right shift slice elements by corresponding elements of @a v. void operator>>=(const valarray<_Tp>&) const; + /// Assign all slice elements to @a t. void operator=(const _Tp&) const; template<class _Dom> @@ -82,50 +118,56 @@ namespace std { void operator<<=(const _Expr<_Dom,_Tp>&) const; template<class _Dom> void operator>>=(const _Expr<_Dom,_Tp>&) const; - + private: _Array<_Tp> _M_array; const valarray<size_t>& _M_index; - + friend class valarray<_Tp>; - - gslice_array(_Array<_Tp>, const valarray<size_t>&); - // this constructor needs to be implemented. - gslice_array(const gslice_array&); + gslice_array(_Array<_Tp>, const valarray<size_t>&); // not implemented gslice_array(); - gslice_array& operator= (const gslice_array&); }; template<typename _Tp> inline gslice_array<_Tp>::gslice_array(_Array<_Tp> __a, const valarray<size_t>& __i) - : _M_array(__a), _M_index(__i) {} + : _M_array(__a), _M_index(__i) {} template<typename _Tp> inline gslice_array<_Tp>::gslice_array(const gslice_array<_Tp>& __a) - : _M_array(__a._M_array), _M_index(__a._M_index) {} + : _M_array(__a._M_array), _M_index(__a._M_index) {} + + + template<typename _Tp> + inline gslice_array<_Tp>& + gslice_array<_Tp>::operator=(const gslice_array<_Tp>& __a) + { + std::__valarray_copy(_Array<_Tp>(__a._M_array), + _Array<size_t>(__a._M_index), _M_index.size(), + _M_array, _Array<size_t>(_M_index)); + return *this; + } - template<typename _Tp> inline void gslice_array<_Tp>::operator=(const _Tp& __t) const - { - __valarray_fill(_M_array, _Array<size_t>(_M_index), - _M_index.size(), __t); + { + std::__valarray_fill(_M_array, _Array<size_t>(_M_index), + _M_index.size(), __t); } template<typename _Tp> inline void gslice_array<_Tp>::operator=(const valarray<_Tp>& __v) const { - __valarray_copy(_Array<_Tp>(__v), __v.size(), - _M_array, _Array<size_t>(_M_index)); + std::__valarray_copy(_Array<_Tp>(__v), __v.size(), + _M_array, _Array<size_t>(_M_index)); } template<typename _Tp> @@ -133,8 +175,8 @@ namespace std { inline void gslice_array<_Tp>::operator=(const _Expr<_Dom, _Tp>& __e) const { - __valarray_copy (__e, _M_index.size(), _M_array, - _Array<size_t>(_M_index)); + std::__valarray_copy (__e, _M_index.size(), _M_array, + _Array<size_t>(_M_index)); } #undef _DEFINE_VALARRAY_OPERATOR @@ -148,8 +190,8 @@ namespace std { } \ \ template<typename _Tp> \ - template<class _Dom> \ - inline void \ + template<class _Dom> \ + inline void \ gslice_array<_Tp>::operator _Op##= (const _Expr<_Dom, _Tp>& __e) const\ { \ _Array_augmented_##_Name(_M_array, _Array<size_t>(_M_index), __e,\ @@ -157,9 +199,9 @@ namespace std { } _DEFINE_VALARRAY_OPERATOR(*, __multiplies) -_DEFINE_VALARRAY_OPERATOR(/, __divides) +_DEFINE_VALARRAY_OPERATOR(/, __divides) _DEFINE_VALARRAY_OPERATOR(%, __modulus) -_DEFINE_VALARRAY_OPERATOR(+, __plus) +_DEFINE_VALARRAY_OPERATOR(+, __plus) _DEFINE_VALARRAY_OPERATOR(-, __minus) _DEFINE_VALARRAY_OPERATOR(^, __bitwise_xor) _DEFINE_VALARRAY_OPERATOR(&, __bitwise_and) @@ -171,7 +213,7 @@ _DEFINE_VALARRAY_OPERATOR(>>, __shift_right) } // std:: -#endif /* _CPP_BITS_GSLICE_ARRAY */ +#endif /* _GSLICE_ARRAY_H */ // Local Variables: // mode:c++ |