_iterator_base.h

symbian上STL模板库的实现

/*
 *
 * Copyright (c) 1994
 * Hewlett-Packard Company
 *
 * Copyright (c) 1996-1998
 * Silicon Graphics Computer Systems, Inc.
 *
 * Copyright (c) 1997
 * Moscow Center for SPARC Technology
 *
 * Copyright (c) 1999 
 * Boris Fomitchev
 *
 * This material is provided "as is", with absolutely no warranty expressed
 * or implied. Any use is at your own risk.
 *
 * Permission to use or copy this software for any purpose is hereby granted 
 * without fee, provided the above notices are retained on all copies.
 * Permission to modify the code and to distribute modified code is granted,
 * provided the above notices are retained, and a notice that the code was
 * modified is included with the above copyright notice.
 *
 */

/* NOTE: This is an internal header file, included by other STL headers.
 *   You should not attempt to use it directly.
 */

#ifndef _STLP_INTERNAL_ITERATOR_BASE_H
#define _STLP_INTERNAL_ITERATOR_BASE_H

//#ifndef _STLP_CSTDDEF
//# include <cstddef>
//#endif
//
//# if defined  (_STLP_IMPORT_VENDOR_CSTD) && ! defined (_STLP_VENDOR_GLOBAL_CSTD)
//_STLP_BEGIN_NAMESPACE  
//using namespace _STLP_VENDOR_CSTD;
//_STLP_END_NAMESPACE
//#endif /* _STLP_IMPORT_VENDOR_CSTD */
//
//#ifndef __TYPE_TRAITS_H
//# include <stl/type_traits.h>
//#endif
//
_STLP_BEGIN_NAMESPACE
//
//struct input_iterator_tag {};
//struct output_iterator_tag {};
//struct forward_iterator_tag : public input_iterator_tag {};
//struct bidirectional_iterator_tag : public forward_iterator_tag {};
//struct random_access_iterator_tag : public bidirectional_iterator_tag {};
//
//
//template <class _Category, class _Tp, __DFL_TMPL_PARAM(_Distance,ptrdiff_t),
//         __DFL_TMPL_PARAM(_Pointer,_Tp*), __DFL_TMPL_PARAM(_Reference,_Tp&) >
//         struct iterator {
//             typedef _Category  iterator_category;
//             typedef _Tp        value_type;
//             typedef _Distance  difference_type;
//             typedef _Pointer   pointer;
//             typedef _Reference reference;
//         };
//_STLP_TEMPLATE_NULL
//struct iterator<output_iterator_tag, void, void, void, void> {
//    typedef output_iterator_tag  iterator_category;
//#ifdef _STLP_CLASS_PARTIAL_SPECIALIZATION
//    typedef void                value_type;
//    typedef void                difference_type;
//    typedef void                pointer;
//    typedef void                reference;
//#endif
//};

# ifdef _STLP_USE_OLD_HP_ITERATOR_QUERIES
#  define _STLP_ITERATOR_CATEGORY(_It, _Tp) iterator_category(_It)
#  define _STLP_DISTANCE_TYPE(_It, _Tp)     distance_type(_It)
#  define _STLP_VALUE_TYPE(_It, _Tp)        value_type(_It)
# else
#  ifdef _STLP_CLASS_PARTIAL_SPECIALIZATION
#   define _STLP_VALUE_TYPE(_It, _Tp)        (typename iterator_traits< _Tp >::value_type*)0
#   define _STLP_DISTANCE_TYPE(_It, _Tp)     (typename iterator_traits< _Tp >::difference_type*)0
#   if defined (__BORLANDC__) || defined (__SUNPRO_CC) || ( defined (__MWERKS__) && (__MWERKS__ <= 0x2303)) || ( defined (__sgi) && defined (_COMPILER_VERSION)) || defined (__DMC__)
#    define _STLP_ITERATOR_CATEGORY(_It, _Tp) iterator_traits< _Tp >::iterator_category()
#   else
#    define _STLP_ITERATOR_CATEGORY(_It, _Tp) typename iterator_traits< _Tp >::iterator_category()
#   endif
#  else
#   define _STLP_ITERATOR_CATEGORY(_It, _Tp) __iterator_category(_It, _IsPtrType<_Tp>::_Ret())
#   define _STLP_DISTANCE_TYPE(_It, _Tp)     (ptrdiff_t*)0
#   define _STLP_VALUE_TYPE(_It, _Tp)        __value_type(_It, _IsPtrType<_Tp>::_Ret() )
#  endif
# endif

//template <class _Iterator>
//struct iterator_traits {
//    typedef typename _Iterator::iterator_category iterator_category;
//    typedef typename _Iterator::value_type        value_type;
//    typedef typename _Iterator::difference_type   difference_type;
//    typedef typename _Iterator::pointer           pointer;
//    typedef typename _Iterator::reference         reference;
//};
//
//
//# if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) && ! defined (__SUNPRO_CC)
//#  define _STLP_DIFFERENCE_TYPE(_Iterator) typename iterator_traits<_Iterator>::difference_type
//# else
//#  define _STLP_DIFFERENCE_TYPE(_Iterator) ptrdiff_t
//# endif
//
//# ifdef _STLP_CLASS_PARTIAL_SPECIALIZATION
//
//// fbp : this order keeps gcc happy
//template <class _Tp>
//struct iterator_traits<const _Tp*> {
//    typedef random_access_iterator_tag iterator_category;
//    typedef _Tp                         value_type;
//    typedef ptrdiff_t                   difference_type;
//    typedef const _Tp*                  pointer;
//    typedef const _Tp&                  reference;
//};
//
//template <class _Tp>
//struct iterator_traits<_Tp*> {
//    typedef random_access_iterator_tag iterator_category;
//    typedef _Tp                         value_type;
//    typedef ptrdiff_t                   difference_type;
//    typedef _Tp*                        pointer;
//    typedef _Tp&                        reference;
//};
//
//#  if defined (__BORLANDC__)
//template <class _Tp>
//struct iterator_traits<_Tp* const> {
//    typedef random_access_iterator_tag iterator_category;
//    typedef _Tp                         value_type;
//    typedef ptrdiff_t                   difference_type;
//    typedef const _Tp*                  pointer;
//    typedef const _Tp&                  reference;
//};
//#  endif
//
//# endif // _STLP_CLASS_PARTIAL_SPECIALIZATION

/*
# if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) \
    || (defined (_STLP_SIMULATE_PARTIAL_SPEC_FOR_TYPE_TRAITS) && ! defined (_STLP_NO_ARROW_OPERATOR))
#  define _STLP_POINTERS_SPECIALIZE( _TpP )
#  define _STLP_DEFINE_ARROW_OPERATOR  pointer operator->() const { return &(operator*()); }
# else 
#  include <stl/_ptrs_specialize.h>
# endif
*/

//# ifndef _STLP_USE_OLD_HP_ITERATOR_QUERIES
//// The overloaded functions iterator_category, distance_type, and
//// value_type are not part of the C++ standard.  (They have been
//// replaced by struct iterator_traits.)  They are included for
//// backward compatibility with the HP STL.
//// We introduce internal names for these functions.
//
//#  ifdef  _STLP_CLASS_PARTIAL_SPECIALIZATION
//
//template <class _Iter>
//inline typename iterator_traits<_Iter>::iterator_category __iterator_category(const _Iter&) {
//    typedef typename iterator_traits<_Iter>::iterator_category _Category;
//    return _Category();
//}
//
//template <class _Iter>
//inline typename iterator_traits<_Iter>::difference_type* __distance_type(const _Iter&) {
//    typedef typename iterator_traits<_Iter>::difference_type _diff_type;
//    return __STATIC_CAST(_diff_type*,0);
//}
//
//template <class _Iter>
//inline typename iterator_traits<_Iter>::value_type* __value_type(const _Iter&) {
//    typedef typename iterator_traits<_Iter>::value_type _value_type;
//    return __STATIC_CAST(_value_type*,0);
//}
//
//# else
//
//template <class _Iter>
//inline random_access_iterator_tag 
//__iterator_category(const _Iter&, const __true_type&) {
//    return random_access_iterator_tag();
//}
//
//template <class _Iter>
//inline _STLP_TYPENAME_ON_RETURN_TYPE iterator_traits<_Iter>::iterator_category
//__iterator_category(const _Iter&, const __false_type&) {
//    typedef typename iterator_traits<_Iter>::iterator_category _Category;
//    return _Category();
//}
//
//
//template <class _Iter>
//inline ptrdiff_t* _STLP_CALL __distance_type(const _Iter&) { return (ptrdiff_t*)(0); }
//
//template <class _Iter>
//inline _STLP_TYPENAME_ON_RETURN_TYPE iterator_traits<_Iter>::value_type* 
//__value_type(const _Iter&, const __false_type&) {
//    typedef typename iterator_traits<_Iter>::value_type _value_type;
//    return __STATIC_CAST(_value_type*,0);
//}
//
//template <class _Tp>
//inline _Tp*  
//__value_type(const _Tp*, const __true_type&) {
//    return __STATIC_CAST(_Tp*, 0);
//}
//
//# endif
//
//#else /* old queries */
//template <class _Category, class _Tp, class _Distance, class _Pointer, class _Reference>
//inline _Category _STLP_CALL iterator_category(const iterator<_Category,_Tp,_Distance,_Pointer,_Reference>&) { return _Category(); }
//template <class _Category, class _Tp, class _Distance, class _Pointer, class _Reference>
//inline _Tp* _STLP_CALL value_type(const iterator<_Category,_Tp,_Distance,_Pointer,_Reference>&) { return (_Tp*)(0); }
//template <class _Category, class _Tp, class _Distance, class _Pointer, class _Reference>
//inline _Distance* _STLP_CALL distance_type(const iterator<_Category,_Tp,_Distance,_Pointer,_Reference>&) { return (_Distance*)(0); }
//template <class _Tp>
//inline random_access_iterator_tag _STLP_CALL iterator_category(const _Tp*) { return random_access_iterator_tag(); }
//template <class _Tp>
//inline _Tp* _STLP_CALL value_type(const _Tp*) { return (_Tp*)(0); }
//template <class _Tp>
//inline ptrdiff_t* _STLP_CALL distance_type(const _Tp*) { return (ptrdiff_t*)(0); }
//#endif /* _STLP_USE_OLD_HP_ITERATOR_QUERIES */
//
//# if ! defined (_STLP_NO_ANACHRONISMS)
//// The base classes input_iterator, output_iterator, forward_iterator,