df9262681b
* algorithm alloc.h defalloc.h hash_map.h hash_set.h iterator memory pthread_alloc pthread_alloc.h rope ropeimpl.h stl_algo.h stl_algobase.h stl_alloc.h stl_bvector.h stl_config.h stl_construct.h stl_deque.h stl_function.h stl_hash_fun.h stl_hash_map.h stl_hash_set.h stl_hashtable.h stl_heap.h stl_iterator.h stl_list.h stl_map.h stl_multimap.h stl_multiset.h stl_numeric.h stl_pair.h stl_queue.h stl_raw_storage_iter.h stl_relops.h stl_rope.h stl_set.h stl_slist.h stl_stack.h stl_tempbuf.h stl_tree.h stl_uninitialized.h stl_vector.h tempbuf.h type_traits.h: Update to SGI STL 3.11. From-SVN: r22190
916 lines
28 KiB
C++
916 lines
28 KiB
C++
/*
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*
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* Copyright (c) 1994
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* Hewlett-Packard Company
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Hewlett-Packard Company makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*
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* Copyright (c) 1996-1998
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* Silicon Graphics Computer Systems, Inc.
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Silicon Graphics makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*/
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/* NOTE: This is an internal header file, included by other STL headers.
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* You should not attempt to use it directly.
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*/
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#ifndef __SGI_STL_INTERNAL_ITERATOR_H
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#define __SGI_STL_INTERNAL_ITERATOR_H
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__STL_BEGIN_NAMESPACE
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struct input_iterator_tag {};
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struct output_iterator_tag {};
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struct forward_iterator_tag : public input_iterator_tag {};
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struct bidirectional_iterator_tag : public forward_iterator_tag {};
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struct random_access_iterator_tag : public bidirectional_iterator_tag {};
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// The base classes input_iterator, output_iterator, forward_iterator,
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// bidirectional_iterator, and random_access_iterator are not part of
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// the C++ standard. (they have been replaced by struct iterator.)
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// They are included for backward compatibility with the HP STL.
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template <class _Tp, class _Distance> struct input_iterator {
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typedef input_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef _Distance difference_type;
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typedef _Tp* pointer;
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typedef _Tp& reference;
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};
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struct output_iterator {
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typedef output_iterator_tag iterator_category;
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typedef void value_type;
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typedef void difference_type;
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typedef void pointer;
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typedef void reference;
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};
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template <class _Tp, class _Distance> struct forward_iterator {
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typedef forward_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef _Distance difference_type;
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typedef _Tp* pointer;
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typedef _Tp& reference;
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};
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template <class _Tp, class _Distance> struct bidirectional_iterator {
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typedef bidirectional_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef _Distance difference_type;
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typedef _Tp* pointer;
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typedef _Tp& reference;
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};
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template <class _Tp, class _Distance> struct random_access_iterator {
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typedef random_access_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef _Distance difference_type;
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typedef _Tp* pointer;
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typedef _Tp& reference;
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};
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#ifdef __STL_USE_NAMESPACES
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template <class _Category, class _Tp, class _Distance = ptrdiff_t,
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class _Pointer = _Tp*, class _Reference = _Tp&>
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struct iterator {
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typedef _Category iterator_category;
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typedef _Tp value_type;
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typedef _Distance difference_type;
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typedef _Pointer pointer;
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typedef _Reference reference;
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};
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#endif /* __STL_USE_NAMESPACES */
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#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
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template <class _Iterator>
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struct iterator_traits {
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typedef typename _Iterator::iterator_category iterator_category;
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typedef typename _Iterator::value_type value_type;
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typedef typename _Iterator::difference_type difference_type;
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typedef typename _Iterator::pointer pointer;
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typedef typename _Iterator::reference reference;
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};
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template <class _Tp>
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struct iterator_traits<_Tp*> {
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typedef random_access_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef ptrdiff_t difference_type;
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typedef _Tp* pointer;
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typedef _Tp& reference;
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};
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template <class _Tp>
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struct iterator_traits<const _Tp*> {
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typedef random_access_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef ptrdiff_t difference_type;
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typedef const _Tp* pointer;
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typedef const _Tp& reference;
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};
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// The overloaded functions iterator_category, distance_type, and
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// value_type are not part of the C++ standard. (They have been
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// replaced by struct iterator_traits.) They are included for
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// backward compatibility with the HP STL.
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// We introduce internal names for these functions.
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template <class _Iter>
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inline typename iterator_traits<_Iter>::iterator_category
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__iterator_category(const _Iter&)
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{
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typedef typename iterator_traits<_Iter>::iterator_category _Category;
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return _Category();
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}
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template <class _Iter>
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inline typename iterator_traits<_Iter>::difference_type*
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__distance_type(const _Iter&)
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{
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return static_cast<typename iterator_traits<_Iter>::difference_type*>(0);
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}
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template <class _Iter>
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inline typename iterator_traits<_Iter>::value_type*
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__value_type(const _Iter&)
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{
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return static_cast<typename iterator_traits<_Iter>::value_type*>(0);
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}
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template <class _Iter>
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inline typename iterator_traits<_Iter>::iterator_category
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iterator_category(const _Iter& __i) { return __iterator_category(__i); }
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template <class _Iter>
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inline typename iterator_traits<_Iter>::difference_type*
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distance_type(const _Iter& __i) { return __distance_type(__i); }
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template <class _Iter>
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inline typename iterator_traits<_Iter>::value_type*
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value_type(const _Iter& __i) { return __value_type(__i); }
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#define __ITERATOR_CATEGORY(__i) __iterator_category(__i)
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#define __DISTANCE_TYPE(__i) __distance_type(__i)
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#define __VALUE_TYPE(__i) __value_type(__i)
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#else /* __STL_CLASS_PARTIAL_SPECIALIZATION */
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template <class _Tp, class _Distance>
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inline input_iterator_tag
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iterator_category(const input_iterator<_Tp, _Distance>&)
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{ return input_iterator_tag(); }
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inline output_iterator_tag iterator_category(const output_iterator&)
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{ return output_iterator_tag(); }
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template <class _Tp, class _Distance>
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inline forward_iterator_tag
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iterator_category(const forward_iterator<_Tp, _Distance>&)
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{ return forward_iterator_tag(); }
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template <class _Tp, class _Distance>
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inline bidirectional_iterator_tag
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iterator_category(const bidirectional_iterator<_Tp, _Distance>&)
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{ return bidirectional_iterator_tag(); }
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template <class _Tp, class _Distance>
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inline random_access_iterator_tag
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iterator_category(const random_access_iterator<_Tp, _Distance>&)
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{ return random_access_iterator_tag(); }
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template <class _Tp>
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inline random_access_iterator_tag iterator_category(const _Tp*)
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{ return random_access_iterator_tag(); }
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template <class _Tp, class _Distance>
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inline _Tp* value_type(const input_iterator<_Tp, _Distance>&)
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{ return (_Tp*)(0); }
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template <class _Tp, class _Distance>
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inline _Tp* value_type(const forward_iterator<_Tp, _Distance>&)
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{ return (_Tp*)(0); }
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template <class _Tp, class _Distance>
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inline _Tp* value_type(const bidirectional_iterator<_Tp, _Distance>&)
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{ return (_Tp*)(0); }
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template <class _Tp, class _Distance>
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inline _Tp* value_type(const random_access_iterator<_Tp, _Distance>&)
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{ return (_Tp*)(0); }
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template <class _Tp>
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inline _Tp* value_type(const _Tp*) { return (_Tp*)(0); }
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template <class _Tp, class _Distance>
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inline _Distance* distance_type(const input_iterator<_Tp, _Distance>&)
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{
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return (_Distance*)(0);
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}
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template <class _Tp, class _Distance>
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inline _Distance* distance_type(const forward_iterator<_Tp, _Distance>&)
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{
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return (_Distance*)(0);
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}
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template <class _Tp, class _Distance>
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inline _Distance*
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distance_type(const bidirectional_iterator<_Tp, _Distance>&)
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{
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return (_Distance*)(0);
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}
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template <class _Tp, class _Distance>
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inline _Distance*
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distance_type(const random_access_iterator<_Tp, _Distance>&)
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{
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return (_Distance*)(0);
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}
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template <class _Tp>
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inline ptrdiff_t* distance_type(const _Tp*) { return (ptrdiff_t*)(0); }
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// Without partial specialization we can't use iterator_traits, so
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// we must keep the old iterator query functions around.
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#define __ITERATOR_CATEGORY(__i) iterator_category(__i)
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#define __DISTANCE_TYPE(__i) distance_type(__i)
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#define __VALUE_TYPE(__i) value_type(__i)
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#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
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template <class _InputIterator, class _Distance>
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inline void __distance(_InputIterator __first, _InputIterator __last,
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_Distance& __n, input_iterator_tag)
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{
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while (__first != __last) { ++__first; ++__n; }
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}
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template <class _RandomAccessIterator, class _Distance>
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inline void __distance(_RandomAccessIterator __first,
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_RandomAccessIterator __last,
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_Distance& __n, random_access_iterator_tag)
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{
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__n += __last - __first;
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}
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template <class _InputIterator, class _Distance>
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inline void distance(_InputIterator __first,
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_InputIterator __last, _Distance& __n)
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{
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__distance(__first, __last, __n, iterator_category(__first));
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}
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#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
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template <class _InputIterator>
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inline typename iterator_traits<_InputIterator>::difference_type
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__distance(_InputIterator __first, _InputIterator __last, input_iterator_tag)
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{
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typename iterator_traits<_InputIterator>::difference_type __n = 0;
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while (__first != __last) {
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++__first; ++__n;
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}
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return __n;
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}
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template <class _RandomAccessIterator>
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inline typename iterator_traits<_RandomAccessIterator>::difference_type
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__distance(_RandomAccessIterator __first, _RandomAccessIterator __last,
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random_access_iterator_tag) {
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return __last - __first;
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}
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template <class _InputIterator>
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inline typename iterator_traits<_InputIterator>::difference_type
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distance(_InputIterator __first, _InputIterator __last) {
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typedef typename iterator_traits<_InputIterator>::iterator_category
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_Category;
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return __distance(__first, __last, _Category());
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}
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#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
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template <class _InputIter, class _Distance>
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inline void __advance(_InputIter& __i, _Distance __n, input_iterator_tag) {
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while (__n--) ++__i;
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}
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#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
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#pragma set woff 1183
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#endif
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template <class _BidirectionalIterator, class _Distance>
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inline void __advance(_BidirectionalIterator& __i, _Distance __n,
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bidirectional_iterator_tag) {
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if (__n >= 0)
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while (__n--) ++__i;
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else
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while (__n++) --__i;
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}
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#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
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#pragma reset woff 1183
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#endif
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template <class _RandomAccessIterator, class _Distance>
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inline void __advance(_RandomAccessIterator& __i, _Distance __n,
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random_access_iterator_tag) {
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__i += __n;
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}
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template <class _InputIterator, class _Distance>
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inline void advance(_InputIterator& __i, _Distance __n) {
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__advance(__i, __n, iterator_category(__i));
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}
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template <class _Container>
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class back_insert_iterator {
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protected:
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_Container* container;
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public:
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typedef _Container container_type;
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typedef output_iterator_tag iterator_category;
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typedef void value_type;
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typedef void difference_type;
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typedef void pointer;
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typedef void reference;
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explicit back_insert_iterator(_Container& __x) : container(&__x) {}
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back_insert_iterator<_Container>&
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operator=(const typename _Container::value_type& __value) {
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container->push_back(__value);
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return *this;
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}
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back_insert_iterator<_Container>& operator*() { return *this; }
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back_insert_iterator<_Container>& operator++() { return *this; }
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back_insert_iterator<_Container>& operator++(int) { return *this; }
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};
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#ifndef __STL_CLASS_PARTIAL_SPECIALIZATION
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template <class _Container>
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inline output_iterator_tag
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iterator_category(const back_insert_iterator<_Container>&)
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{
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return output_iterator_tag();
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}
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#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
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template <class _Container>
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inline back_insert_iterator<_Container> back_inserter(_Container& __x) {
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return back_insert_iterator<_Container>(__x);
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}
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template <class _Container>
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class front_insert_iterator {
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protected:
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_Container* container;
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public:
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typedef _Container container_type;
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typedef output_iterator_tag iterator_category;
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typedef void value_type;
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typedef void difference_type;
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typedef void pointer;
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typedef void reference;
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explicit front_insert_iterator(_Container& __x) : container(&__x) {}
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front_insert_iterator<_Container>&
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operator=(const typename _Container::value_type& __value) {
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container->push_front(__value);
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return *this;
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}
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front_insert_iterator<_Container>& operator*() { return *this; }
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front_insert_iterator<_Container>& operator++() { return *this; }
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front_insert_iterator<_Container>& operator++(int) { return *this; }
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};
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#ifndef __STL_CLASS_PARTIAL_SPECIALIZATION
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template <class _Container>
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inline output_iterator_tag
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iterator_category(const front_insert_iterator<_Container>&)
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{
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return output_iterator_tag();
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}
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#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
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template <class _Container>
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inline front_insert_iterator<_Container> front_inserter(_Container& __x) {
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return front_insert_iterator<_Container>(__x);
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}
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template <class _Container>
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class insert_iterator {
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protected:
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_Container* container;
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typename _Container::iterator iter;
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public:
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typedef _Container container_type;
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typedef output_iterator_tag iterator_category;
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typedef void value_type;
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typedef void difference_type;
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typedef void pointer;
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typedef void reference;
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insert_iterator(_Container& __x, typename _Container::iterator __i)
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: container(&__x), iter(__i) {}
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insert_iterator<_Container>&
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operator=(const typename _Container::value_type& __value) {
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iter = container->insert(iter, __value);
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++iter;
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return *this;
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}
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insert_iterator<_Container>& operator*() { return *this; }
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insert_iterator<_Container>& operator++() { return *this; }
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insert_iterator<_Container>& operator++(int) { return *this; }
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};
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#ifndef __STL_CLASS_PARTIAL_SPECIALIZATION
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template <class _Container>
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inline output_iterator_tag
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iterator_category(const insert_iterator<_Container>&)
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{
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return output_iterator_tag();
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}
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#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
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template <class _Container, class _Iterator>
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inline
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insert_iterator<_Container> inserter(_Container& __x, _Iterator __i)
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{
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typedef typename _Container::iterator __iter;
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return insert_iterator<_Container>(__x, __iter(__i));
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}
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#ifndef __STL_LIMITED_DEFAULT_TEMPLATES
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template <class _BidirectionalIterator, class _Tp, class _Reference = _Tp&,
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class _Distance = ptrdiff_t>
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#else
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template <class _BidirectionalIterator, class _Tp, class _Reference,
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class _Distance>
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#endif
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class reverse_bidirectional_iterator {
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typedef reverse_bidirectional_iterator<_BidirectionalIterator, _Tp,
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_Reference, _Distance> _Self;
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protected:
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_BidirectionalIterator current;
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public:
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typedef bidirectional_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef _Distance difference_type;
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typedef _Tp* pointer;
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typedef _Reference reference;
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reverse_bidirectional_iterator() {}
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explicit reverse_bidirectional_iterator(_BidirectionalIterator __x)
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: current(__x) {}
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_BidirectionalIterator base() const { return current; }
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_Reference operator*() const {
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_BidirectionalIterator __tmp = current;
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return *--__tmp;
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}
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#ifndef __SGI_STL_NO_ARROW_OPERATOR
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pointer operator->() const { return &(operator*()); }
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#endif /* __SGI_STL_NO_ARROW_OPERATOR */
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_Self& operator++() {
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--current;
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return *this;
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}
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_Self operator++(int) {
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_Self __tmp = *this;
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--current;
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return __tmp;
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}
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_Self& operator--() {
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++current;
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return *this;
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}
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_Self operator--(int) {
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_Self __tmp = *this;
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++current;
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return __tmp;
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}
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};
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#ifndef __STL_CLASS_PARTIAL_SPECIALIZATION
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template <class _BidirectionalIterator, class _Tp, class _Reference,
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class _Distance>
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inline bidirectional_iterator_tag
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iterator_category(const reverse_bidirectional_iterator<_BidirectionalIterator,
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_Tp, _Reference,
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_Distance>&)
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{
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return bidirectional_iterator_tag();
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}
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template <class _BidirectionalIterator, class _Tp, class _Reference,
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class _Distance>
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inline _Tp*
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value_type(const reverse_bidirectional_iterator<_BidirectionalIterator, _Tp,
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_Reference, _Distance>&)
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{
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return (_Tp*) 0;
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}
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template <class _BidirectionalIterator, class _Tp, class _Reference,
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class _Distance>
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inline _Distance*
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distance_type(const reverse_bidirectional_iterator<_BidirectionalIterator,
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_Tp,
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_Reference, _Distance>&)
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{
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return (_Distance*) 0;
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}
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#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
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template <class _BiIter, class _Tp, class _Ref,
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class _Distance>
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inline bool operator==(
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const reverse_bidirectional_iterator<_BiIter, _Tp, _Ref, _Distance>& __x,
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const reverse_bidirectional_iterator<_BiIter, _Tp, _Ref, _Distance>& __y)
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{
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return __x.base() == __y.base();
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}
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#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
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// This is the new version of reverse_iterator, as defined in the
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// draft C++ standard. It relies on the iterator_traits template,
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// which in turn relies on partial specialization. The class
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// reverse_bidirectional_iterator is no longer part of the draft
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// standard, but it is retained for backward compatibility.
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template <class _Iterator>
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class reverse_iterator
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{
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protected:
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_Iterator current;
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public:
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typedef typename iterator_traits<_Iterator>::iterator_category
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iterator_category;
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typedef typename iterator_traits<_Iterator>::value_type
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value_type;
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typedef typename iterator_traits<_Iterator>::difference_type
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difference_type;
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typedef typename iterator_traits<_Iterator>::pointer
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pointer;
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typedef typename iterator_traits<_Iterator>::reference
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reference;
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typedef _Iterator iterator_type;
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typedef reverse_iterator<_Iterator> _Self;
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public:
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reverse_iterator() {}
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explicit reverse_iterator(iterator_type __x) : current(__x) {}
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reverse_iterator(const _Self& __x) : current(__x.current) {}
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#ifdef __STL_MEMBER_TEMPLATES
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template <class _Iter>
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reverse_iterator(const reverse_iterator<_Iter>& __x)
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: current(__x.base()) {}
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#endif /* __STL_MEMBER_TEMPLATES */
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iterator_type base() const { return current; }
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reference operator*() const {
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_Iterator __tmp = current;
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return *--__tmp;
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}
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#ifndef __SGI_STL_NO_ARROW_OPERATOR
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pointer operator->() const { return &(operator*()); }
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#endif /* __SGI_STL_NO_ARROW_OPERATOR */
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_Self& operator++() {
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--current;
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return *this;
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}
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_Self operator++(int) {
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_Self __tmp = *this;
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--current;
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return __tmp;
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}
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_Self& operator--() {
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++current;
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return *this;
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}
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_Self operator--(int) {
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_Self __tmp = *this;
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++current;
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return __tmp;
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}
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_Self operator+(difference_type __n) const {
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return _Self(current - __n);
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}
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_Self& operator+=(difference_type __n) {
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current -= __n;
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return *this;
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}
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_Self operator-(difference_type __n) const {
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return _Self(current + __n);
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}
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_Self& operator-=(difference_type __n) {
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current += __n;
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return *this;
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}
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reference operator[](difference_type __n) const { return *(*this + __n); }
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};
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template <class _Iterator>
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inline bool operator==(const reverse_iterator<_Iterator>& __x,
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const reverse_iterator<_Iterator>& __y) {
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return __x.base() == __y.base();
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}
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template <class _Iterator>
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inline bool operator<(const reverse_iterator<_Iterator>& __x,
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const reverse_iterator<_Iterator>& __y) {
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return __y.base() < __x.base();
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}
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template <class _Iterator>
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inline typename reverse_iterator<_Iterator>::difference_type
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operator-(const reverse_iterator<_Iterator>& __x,
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const reverse_iterator<_Iterator>& __y) {
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return __y.base() - __x.base();
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}
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template <class _Iterator>
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inline reverse_iterator<_Iterator>
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operator+(typename reverse_iterator<_Iterator>::difference_type __n,
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const reverse_iterator<_Iterator>& __x) {
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return reverse_iterator<_Iterator>(__x.base() - __n);
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}
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#else /* __STL_CLASS_PARTIAL_SPECIALIZATION */
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// This is the old version of reverse_iterator, as found in the original
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// HP STL. It does not use partial specialization.
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#ifndef __STL_LIMITED_DEFAULT_TEMPLATES
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template <class _RandomAccessIterator, class _Tp, class _Reference = _Tp&,
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class _Distance = ptrdiff_t>
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#else
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template <class _RandomAccessIterator, class _Tp, class _Reference,
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class _Distance>
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#endif
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class reverse_iterator {
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typedef reverse_iterator<_RandomAccessIterator, _Tp, _Reference, _Distance>
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_Self;
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protected:
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_RandomAccessIterator current;
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public:
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typedef random_access_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef _Distance difference_type;
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typedef _Tp* pointer;
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typedef _Reference reference;
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reverse_iterator() {}
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explicit reverse_iterator(_RandomAccessIterator __x) : current(__x) {}
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_RandomAccessIterator base() const { return current; }
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_Reference operator*() const { return *(current - 1); }
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#ifndef __SGI_STL_NO_ARROW_OPERATOR
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pointer operator->() const { return &(operator*()); }
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#endif /* __SGI_STL_NO_ARROW_OPERATOR */
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_Self& operator++() {
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--current;
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return *this;
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}
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_Self operator++(int) {
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_Self __tmp = *this;
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--current;
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return __tmp;
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}
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_Self& operator--() {
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++current;
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return *this;
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}
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_Self operator--(int) {
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_Self __tmp = *this;
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++current;
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return __tmp;
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}
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_Self operator+(_Distance __n) const {
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return _Self(current - __n);
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}
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_Self& operator+=(_Distance __n) {
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current -= __n;
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return *this;
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}
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_Self operator-(_Distance __n) const {
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return _Self(current + __n);
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}
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_Self& operator-=(_Distance __n) {
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current += __n;
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return *this;
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}
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_Reference operator[](_Distance __n) const { return *(*this + __n); }
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};
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template <class _RandomAccessIterator, class _Tp,
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class _Reference, class _Distance>
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inline random_access_iterator_tag
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iterator_category(const reverse_iterator<_RandomAccessIterator, _Tp,
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_Reference, _Distance>&)
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{
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return random_access_iterator_tag();
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}
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template <class _RandomAccessIterator, class _Tp,
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class _Reference, class _Distance>
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inline _Tp* value_type(const reverse_iterator<_RandomAccessIterator, _Tp,
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_Reference, _Distance>&)
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{
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return (_Tp*) 0;
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}
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template <class _RandomAccessIterator, class _Tp,
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class _Reference, class _Distance>
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inline _Distance*
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distance_type(const reverse_iterator<_RandomAccessIterator,
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_Tp, _Reference, _Distance>&)
|
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{
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return (_Distance*) 0;
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}
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|
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template <class _RandomAccessIterator, class _Tp,
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class _Reference, class _Distance>
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inline bool
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operator==(const reverse_iterator<_RandomAccessIterator, _Tp,
|
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_Reference, _Distance>& __x,
|
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const reverse_iterator<_RandomAccessIterator, _Tp,
|
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_Reference, _Distance>& __y)
|
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{
|
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return __x.base() == __y.base();
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}
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|
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template <class _RandomAccessIterator, class _Tp,
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class _Reference, class _Distance>
|
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inline bool
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operator<(const reverse_iterator<_RandomAccessIterator, _Tp,
|
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_Reference, _Distance>& __x,
|
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const reverse_iterator<_RandomAccessIterator, _Tp,
|
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_Reference, _Distance>& __y)
|
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{
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return __y.base() < __x.base();
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}
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|
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template <class _RandomAccessIterator, class _Tp,
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class _Reference, class _Distance>
|
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inline _Distance
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operator-(const reverse_iterator<_RandomAccessIterator, _Tp,
|
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_Reference, _Distance>& __x,
|
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const reverse_iterator<_RandomAccessIterator, _Tp,
|
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_Reference, _Distance>& __y)
|
|
{
|
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return __y.base() - __x.base();
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}
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|
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template <class _RandAccIter, class _Tp, class _Ref, class _Dist>
|
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inline reverse_iterator<_RandAccIter, _Tp, _Ref, _Dist>
|
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operator+(_Dist __n,
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const reverse_iterator<_RandAccIter, _Tp, _Ref, _Dist>& __x)
|
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{
|
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return reverse_iterator<_RandAccIter, _Tp, _Ref, _Dist>(__x.base() - __n);
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}
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|
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#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
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|
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// When we have templatized iostreams, istream_iterator and ostream_iterator
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// must be rewritten.
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|
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template <class _Tp, class _Dist = ptrdiff_t>
|
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class istream_iterator {
|
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friend bool operator== __STL_NULL_TMPL_ARGS (const istream_iterator&,
|
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const istream_iterator&);
|
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protected:
|
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istream* _M_stream;
|
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_Tp _M_value;
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bool _M_end_marker;
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void _M_read() {
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_M_end_marker = (*_M_stream) ? true : false;
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if (_M_end_marker) *_M_stream >> _M_value;
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_M_end_marker = (*_M_stream) ? true : false;
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}
|
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public:
|
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typedef input_iterator_tag iterator_category;
|
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typedef _Tp value_type;
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typedef _Dist difference_type;
|
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typedef const _Tp* pointer;
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typedef const _Tp& reference;
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istream_iterator() : _M_stream(&cin), _M_end_marker(false) {}
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istream_iterator(istream& __s) : _M_stream(&__s) { _M_read(); }
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reference operator*() const { return _M_value; }
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#ifndef __SGI_STL_NO_ARROW_OPERATOR
|
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pointer operator->() const { return &(operator*()); }
|
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#endif /* __SGI_STL_NO_ARROW_OPERATOR */
|
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istream_iterator<_Tp, _Dist>& operator++() {
|
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_M_read();
|
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return *this;
|
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}
|
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istream_iterator<_Tp, _Dist> operator++(int) {
|
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istream_iterator<_Tp, _Dist> __tmp = *this;
|
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_M_read();
|
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return __tmp;
|
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}
|
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};
|
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|
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#ifndef __STL_CLASS_PARTIAL_SPECIALIZATION
|
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|
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template <class _Tp, class _Dist>
|
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inline input_iterator_tag
|
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iterator_category(const istream_iterator<_Tp, _Dist>&)
|
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{
|
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return input_iterator_tag();
|
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}
|
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|
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template <class _Tp, class _Dist>
|
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inline _Tp*
|
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value_type(const istream_iterator<_Tp, _Dist>&) { return (_Tp*) 0; }
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|
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template <class _Tp, class _Dist>
|
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inline _Dist*
|
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distance_type(const istream_iterator<_Tp, _Dist>&) { return (_Dist*)0; }
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#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
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|
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template <class _Tp, class _Distance>
|
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inline bool operator==(const istream_iterator<_Tp, _Distance>& __x,
|
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const istream_iterator<_Tp, _Distance>& __y) {
|
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return (__x._M_stream == __y._M_stream &&
|
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__x._M_end_marker == __y._M_end_marker) ||
|
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__x._M_end_marker == false && __y._M_end_marker == false;
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}
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|
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template <class _Tp>
|
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class ostream_iterator {
|
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protected:
|
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ostream* _M_stream;
|
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const char* _M_string;
|
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public:
|
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typedef output_iterator_tag iterator_category;
|
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typedef void value_type;
|
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typedef void difference_type;
|
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typedef void pointer;
|
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typedef void reference;
|
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|
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ostream_iterator(ostream& __s) : _M_stream(&__s), _M_string(0) {}
|
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ostream_iterator(ostream& __s, const char* __c)
|
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: _M_stream(&__s), _M_string(__c) {}
|
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ostream_iterator<_Tp>& operator=(const _Tp& __value) {
|
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*_M_stream << __value;
|
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if (_M_string) *_M_stream << _M_string;
|
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return *this;
|
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}
|
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ostream_iterator<_Tp>& operator*() { return *this; }
|
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ostream_iterator<_Tp>& operator++() { return *this; }
|
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ostream_iterator<_Tp>& operator++(int) { return *this; }
|
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};
|
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|
|
#ifndef __STL_CLASS_PARTIAL_SPECIALIZATION
|
|
|
|
template <class _Tp>
|
|
inline output_iterator_tag
|
|
iterator_category(const ostream_iterator<_Tp>&) {
|
|
return output_iterator_tag();
|
|
}
|
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|
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#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
|
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|
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__STL_END_NAMESPACE
|
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|
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#endif /* __SGI_STL_INTERNAL_ITERATOR_H */
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// Local Variables:
|
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// mode:C++
|
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// End:
|