b581eaf700
2001-06-26 Benjamin Kosnik <bkoz@redhat.com> * include/bits/std_iterator.h: Include sbuf_iter.h via std_ios.h. * include/bits/stl_iterator.h (istream_iterator): Inherit from iterator. (ostream_iterator): Same. * testsuite/24_iterators/istream_iterator.cc: New file. * testsuite/24_iterators/ostream_iterator.cc: New file. * include/bits/sbuf_iter.h: Remove self typedef. * testsuite/24_iterators/ostreambuf_iterator.cc: Add test. * testsuite/24_iterators/istreambuf_iterator.cc: Add test. * include/bits/stl_iterator.h (reverse_iterator): Remove extraneous typedefs. Add typename. (__normal_iterator): Remove typedefs referring to self. Add typename. (reverse_bidiretional_iterator): Remove, not longer required. From-SVN: r43570
516 lines
16 KiB
C++
516 lines
16 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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namespace std
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{
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// 24.4.1 Reverse iterators
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template<typename _Iterator>
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class reverse_iterator
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: public iterator<typename iterator_traits<_Iterator>::iterator_category,
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typename iterator_traits<_Iterator>::value_type,
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typename iterator_traits<_Iterator>::difference_type,
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typename iterator_traits<_Iterator>::pointer,
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typename iterator_traits<_Iterator>::reference>
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{
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protected:
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_Iterator _M_current;
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public:
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typedef _Iterator iterator_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>::reference reference;
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typedef typename iterator_traits<_Iterator>::pointer pointer;
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public:
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reverse_iterator() {}
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explicit
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reverse_iterator(iterator_type __x) : _M_current(__x) {}
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reverse_iterator(const reverse_iterator& __x)
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: _M_current(__x._M_current) { }
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template<typename _Iter>
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reverse_iterator(const reverse_iterator<_Iter>& __x)
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: _M_current(__x.base()) {}
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iterator_type
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base() const { return _M_current; }
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reference
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operator*() const
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{
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_Iterator __tmp = _M_current;
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return *--__tmp;
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}
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pointer
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operator->() const { return &(operator*()); }
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reverse_iterator&
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operator++()
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{
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--_M_current;
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return *this;
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}
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reverse_iterator
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operator++(int)
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{
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reverse_iterator __tmp = *this;
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--_M_current;
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return __tmp;
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}
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reverse_iterator&
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operator--()
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{
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++_M_current;
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return *this;
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}
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reverse_iterator operator--(int)
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{
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reverse_iterator __tmp = *this;
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++_M_current;
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return __tmp;
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}
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reverse_iterator
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operator+(difference_type __n) const
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{ return reverse_iterator(_M_current - __n); }
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reverse_iterator&
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operator+=(difference_type __n)
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{
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_M_current -= __n;
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return *this;
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}
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reverse_iterator
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operator-(difference_type __n) const
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{ return reverse_iterator(_M_current + __n); }
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reverse_iterator&
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operator-=(difference_type __n)
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{
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_M_current += __n;
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return *this;
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}
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reference
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operator[](difference_type __n) const { return *(*this + __n); }
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};
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template<typename _Iterator>
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inline bool
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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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template<typename _Iterator>
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inline bool
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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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template<typename _Iterator>
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inline bool
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operator!=(const reverse_iterator<_Iterator>& __x,
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const reverse_iterator<_Iterator>& __y)
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{ return !(__x == __y); }
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template<typename _Iterator>
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inline bool
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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 < __x; }
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template<typename _Iterator>
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inline bool
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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 < __x); }
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template<typename _Iterator>
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inline bool
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operator>=(const reverse_iterator<_Iterator>& __x,
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const reverse_iterator<_Iterator>& __y)
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{ return !(__x < __y); }
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template<typename _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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template<typename _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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// 24.4.2.2.1 back_insert_iterator
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template<typename _Container>
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class back_insert_iterator
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: public iterator<output_iterator_tag, void, void, void, void>
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{
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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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explicit
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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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{
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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>&
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operator*() { return *this; }
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back_insert_iterator<_Container>&
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operator++() { return *this; }
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back_insert_iterator<_Container>&
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operator++(int) { return *this; }
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};
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template<typename _Container>
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inline back_insert_iterator<_Container>
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back_inserter(_Container& __x)
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{ return back_insert_iterator<_Container>(__x); }
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template<typename _Container>
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class front_insert_iterator
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: public iterator<output_iterator_tag, void, void, void, void>
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{
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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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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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template<typename _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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template<typename _Container>
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class insert_iterator
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: public iterator<output_iterator_tag, void, void, void, void>
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{
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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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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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template<typename _Container, typename _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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template<typename _Tp, typename _CharT = char,
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typename _Traits = char_traits<_CharT>, typename _Dist = ptrdiff_t>
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class istream_iterator
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: public iterator<input_iterator_tag, _Tp, _Dist, const _Tp*, const _Tp&>
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{
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public:
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typedef _CharT char_type;
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typedef _Traits traits_type;
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typedef basic_istream<_CharT, _Traits> istream_type;
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private:
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istream_type* _M_stream;
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_Tp _M_value;
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bool _M_ok;
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public:
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istream_iterator() : _M_stream(0), _M_ok(false) {}
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istream_iterator(istream_type& __s) : _M_stream(&__s) { _M_read(); }
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reference
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operator*() const { return _M_value; }
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pointer
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operator->() const { return &(operator*()); }
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istream_iterator&
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operator++()
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{ _M_read(); return *this; }
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istream_iterator
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operator++(int)
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{
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istream_iterator __tmp = *this;
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_M_read();
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return __tmp;
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}
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bool
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_M_equal(const istream_iterator& __x) const
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{ return (_M_ok == __x._M_ok) && (!_M_ok || _M_stream == __x._M_stream);}
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private:
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void _M_read()
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{
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_M_ok = (_M_stream && *_M_stream) ? true : false;
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if (_M_ok)
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{
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*_M_stream >> _M_value;
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_M_ok = *_M_stream ? true : false;
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}
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}
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};
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template<typename _Tp, typename _CharT, typename _Traits, typename _Dist>
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inline bool
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operator==(const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __x,
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const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __y)
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{ return __x._M_equal(__y); }
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template <class _Tp, class _CharT, class _Traits, class _Dist>
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inline bool
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operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __x,
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const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __y)
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{ return !__x._M_equal(__y); }
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template<typename _Tp, typename _CharT = char,
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typename _Traits = char_traits<_CharT> >
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class ostream_iterator
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: public iterator<output_iterator_tag, void, void, void, void>
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{
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public:
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typedef _CharT char_type;
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typedef _Traits traits_type;
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typedef basic_ostream<_CharT, _Traits> ostream_type;
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private:
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ostream_type* _M_stream;
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const _CharT* _M_string;
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public:
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ostream_iterator(ostream_type& __s) : _M_stream(&__s), _M_string(0) {}
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ostream_iterator(ostream_type& __s, const _CharT* __c)
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: _M_stream(&__s), _M_string(__c) { }
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ostream_iterator&
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operator=(const _Tp& __value)
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{
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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&
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operator*() { return *this; }
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ostream_iterator&
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operator++() { return *this; }
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ostream_iterator&
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operator++(int) { return *this; }
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};
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// This iterator adapter is 'normal' in the sense that it does not
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// change the semantics of any of the operators of its itererator
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// parameter. Its primary purpose is to convert an iterator that is
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// not a class, e.g. a pointer, into an iterator that is a class.
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// The _Container parameter exists solely so that different containers
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// using this template can instantiate different types, even if the
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// _Iterator parameter is the same.
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template<typename _Iterator, typename _Container>
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class __normal_iterator
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: public iterator<typename iterator_traits<_Iterator>::iterator_category,
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typename iterator_traits<_Iterator>::value_type,
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typename iterator_traits<_Iterator>::difference_type,
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typename iterator_traits<_Iterator>::pointer,
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typename iterator_traits<_Iterator>::reference>
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{
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protected:
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_Iterator _M_current;
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public:
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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>::reference reference;
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typedef typename iterator_traits<_Iterator>::pointer pointer;
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__normal_iterator() : _M_current(_Iterator()) { }
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explicit
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__normal_iterator(const _Iterator& __i) : _M_current(__i) { }
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// Allow iterator to const_iterator conversion
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template<typename _Iter>
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inline __normal_iterator(const __normal_iterator<_Iter, _Container>& __i)
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: _M_current(__i.base()) { }
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// Forward iterator requirements
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reference
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operator*() const { return *_M_current; }
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pointer
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operator->() const { return _M_current; }
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__normal_iterator&
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operator++() { ++_M_current; return *this; }
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__normal_iterator
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operator++(int) { return __normal_iterator(_M_current++); }
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// Bidirectional iterator requirements
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__normal_iterator&
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operator--() { --_M_current; return *this; }
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__normal_iterator
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operator--(int) { return __normal_iterator(_M_current--); }
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// Random access iterator requirements
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reference
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operator[](const difference_type& __n) const
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{ return _M_current[__n]; }
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__normal_iterator&
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operator+=(const difference_type& __n)
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{ _M_current += __n; return *this; }
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__normal_iterator
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operator+(const difference_type& __n) const
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{ return __normal_iterator(_M_current + __n); }
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__normal_iterator&
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operator-=(const difference_type& __n)
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{ _M_current -= __n; return *this; }
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__normal_iterator
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operator-(const difference_type& __n) const
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{ return __normal_iterator(_M_current - __n); }
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difference_type
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operator-(const __normal_iterator& __i) const
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{ return _M_current - __i._M_current; }
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const _Iterator&
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base() const { return _M_current; }
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};
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// Forward iterator requirements
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template<typename _IteratorL, typename _IteratorR, typename _Container>
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inline bool
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operator==(const __normal_iterator<_IteratorL, _Container>& __lhs,
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const __normal_iterator<_IteratorR, _Container>& __rhs)
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{ return __lhs.base() == __rhs.base(); }
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template<typename _IteratorL, typename _IteratorR, typename _Container>
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inline bool
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operator!=(const __normal_iterator<_IteratorL, _Container>& __lhs,
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const __normal_iterator<_IteratorR, _Container>& __rhs)
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{ return !(__lhs == __rhs); }
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// Random access iterator requirements
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template<typename _IteratorL, typename _IteratorR, typename _Container>
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inline bool
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operator<(const __normal_iterator<_IteratorL, _Container>& __lhs,
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const __normal_iterator<_IteratorR, _Container>& __rhs)
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{ return __lhs.base() < __rhs.base(); }
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template<typename _IteratorL, typename _IteratorR, typename _Container>
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inline bool
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operator>(const __normal_iterator<_IteratorL, _Container>& __lhs,
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const __normal_iterator<_IteratorR, _Container>& __rhs)
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{ return __rhs < __lhs; }
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template<typename _IteratorL, typename _IteratorR, typename _Container>
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inline bool
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operator<=(const __normal_iterator<_IteratorL, _Container>& __lhs,
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const __normal_iterator<_IteratorR, _Container>& __rhs)
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{ return !(__rhs < __lhs); }
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template<typename _IteratorL, typename _IteratorR, typename _Container>
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inline bool
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operator>=(const __normal_iterator<_IteratorL, _Container>& __lhs,
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const __normal_iterator<_IteratorR, _Container>& __rhs)
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{ return !(__lhs < __rhs); }
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template<typename _Iterator, typename _Container>
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inline __normal_iterator<_Iterator, _Container>
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operator+(__normal_iterator<_Iterator, _Container>::difference_type __n,
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const __normal_iterator<_Iterator, _Container>& __i)
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{ return __normal_iterator<_Iterator, _Container>(__i.base() + __n); }
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} // namespace std
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#endif
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// Local Variables:
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// mode:C++
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// End:
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