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gcc/libstdc++-v3/bits/stl_iterator.h
Benjamin Kosnik 54a3a08788 Update to SGI STL 3.3 
2000-06-27  Benjamin Kosnik  <bkoz@purist.soma.redhat.com>

	Update to SGI STL 3.3
	* ext/hash_map, ext/hash_set, ext/slist, ext/stl_bvector.h,
	ext/stl_rope.h, ext/ropeimpl.h: Update.
	* bits/std_bitset.h, bits/std_map, bits/std_memory.h,
	bits/stl_algo.h, bits/stl_algobase.h, bits/stl_alloc.h,
	bits/stl_config.h, bits/stl_construct.h, bits/stl_deque.h,
	bits/stl_function.h, bits/stl_heap.h, bits/stl_iterator.h,
	bits/stl_iterator_base.h, bits/stl_list.h, bits/stl_map.h,
	bits/stl_multimap.h, bits/stl_multiset.h, bits/stl_numeric.h,
	bits/stl_queue.h, bits/stl_set.h, bits/stl_stack.h,
	bits/stl_string_fwd.h, bits/stl_threads.h, bits/stl_three.h,
	bits/stl_uninitialized.h, bits/stl_vectory.h: Update.

	* src/Makefile.am (headers): Add new files.
	* src/Makefile.in: Regenerate.
	* src/stl-inst.cc (std): Add instantiation for __sink_unused_warning.
	* bits/concept_checks.h: New file.
	* bits/container_concepts.h: New file.
	* bits/sequence_concepts.h: New file.

From-SVN: r34743
2000-06-27 20:57:11 +00:00

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/*
*
* Copyright (c) 1994
* Hewlett-Packard Company
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Hewlett-Packard Company makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*
* Copyright (c) 1996-1998
* Silicon Graphics Computer Systems, Inc.
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Silicon Graphics makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*/
/* NOTE: This is an internal header file, included by other STL headers.
* You should not attempt to use it directly.
*/
#ifndef __SGI_STL_INTERNAL_ITERATOR_H
#define __SGI_STL_INTERNAL_ITERATOR_H
__STL_BEGIN_NAMESPACE
template <class _Container>
class back_insert_iterator {
protected:
_Container* container;
public:
typedef _Container container_type;
typedef output_iterator_tag iterator_category;
typedef void value_type;
typedef void difference_type;
typedef void pointer;
typedef void reference;
explicit back_insert_iterator(_Container& __x) : container(&__x) {}
back_insert_iterator<_Container>&
operator=(const typename _Container::value_type& __value) {
container->push_back(__value);
return *this;
}
back_insert_iterator<_Container>& operator*() { return *this; }
back_insert_iterator<_Container>& operator++() { return *this; }
back_insert_iterator<_Container>& operator++(int) { return *this; }
};
#ifndef __STL_CLASS_PARTIAL_SPECIALIZATION
template <class _Container>
inline output_iterator_tag
iterator_category(const back_insert_iterator<_Container>&)
{
return output_iterator_tag();
}
#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
template <class _Container>
inline back_insert_iterator<_Container> back_inserter(_Container& __x) {
return back_insert_iterator<_Container>(__x);
}
template <class _Container>
class front_insert_iterator {
protected:
_Container* container;
public:
typedef _Container container_type;
typedef output_iterator_tag iterator_category;
typedef void value_type;
typedef void difference_type;
typedef void pointer;
typedef void reference;
explicit front_insert_iterator(_Container& __x) : container(&__x) {}
front_insert_iterator<_Container>&
operator=(const typename _Container::value_type& __value) {
container->push_front(__value);
return *this;
}
front_insert_iterator<_Container>& operator*() { return *this; }
front_insert_iterator<_Container>& operator++() { return *this; }
front_insert_iterator<_Container>& operator++(int) { return *this; }
};
#ifndef __STL_CLASS_PARTIAL_SPECIALIZATION
template <class _Container>
inline output_iterator_tag
iterator_category(const front_insert_iterator<_Container>&)
{
return output_iterator_tag();
}
#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
template <class _Container>
inline front_insert_iterator<_Container> front_inserter(_Container& __x) {
return front_insert_iterator<_Container>(__x);
}
template <class _Container>
class insert_iterator {
protected:
_Container* container;
typename _Container::iterator iter;
public:
typedef _Container container_type;
typedef output_iterator_tag iterator_category;
typedef void value_type;
typedef void difference_type;
typedef void pointer;
typedef void reference;
insert_iterator(_Container& __x, typename _Container::iterator __i)
: container(&__x), iter(__i) {}
insert_iterator<_Container>&
operator=(const typename _Container::value_type& __value) {
iter = container->insert(iter, __value);
++iter;
return *this;
}
insert_iterator<_Container>& operator*() { return *this; }
insert_iterator<_Container>& operator++() { return *this; }
insert_iterator<_Container>& operator++(int) { return *this; }
};
#ifndef __STL_CLASS_PARTIAL_SPECIALIZATION
template <class _Container>
inline output_iterator_tag
iterator_category(const insert_iterator<_Container>&)
{
return output_iterator_tag();
}
#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
template <class _Container, class _Iterator>
inline
insert_iterator<_Container> inserter(_Container& __x, _Iterator __i)
{
typedef typename _Container::iterator __iter;
return insert_iterator<_Container>(__x, __iter(__i));
}
template <class _BidirectionalIterator, class _Tp, class _Reference = _Tp&,
class _Distance = ptrdiff_t>
class reverse_bidirectional_iterator {
typedef reverse_bidirectional_iterator<_BidirectionalIterator, _Tp,
_Reference, _Distance> _Self;
protected:
_BidirectionalIterator current;
public:
typedef bidirectional_iterator_tag iterator_category;
typedef _Tp value_type;
typedef _Distance difference_type;
typedef _Tp* pointer;
typedef _Reference reference;
reverse_bidirectional_iterator() {}
explicit reverse_bidirectional_iterator(_BidirectionalIterator __x)
: current(__x) {}
_BidirectionalIterator base() const { return current; }
_Reference operator*() const {
_BidirectionalIterator __tmp = current;
return *--__tmp;
}
#ifndef __SGI_STL_NO_ARROW_OPERATOR
pointer operator->() const { return &(operator*()); }
#endif /* __SGI_STL_NO_ARROW_OPERATOR */
_Self& operator++() {
--current;
return *this;
}
_Self operator++(int) {
_Self __tmp = *this;
--current;
return __tmp;
}
_Self& operator--() {
++current;
return *this;
}
_Self operator--(int) {
_Self __tmp = *this;
++current;
return __tmp;
}
};
#ifndef __STL_CLASS_PARTIAL_SPECIALIZATION
template <class _BidirectionalIterator, class _Tp, class _Reference,
class _Distance>
inline bidirectional_iterator_tag
iterator_category(const reverse_bidirectional_iterator<_BidirectionalIterator,
_Tp, _Reference,
_Distance>&)
{
return bidirectional_iterator_tag();
}
template <class _BidirectionalIterator, class _Tp, class _Reference,
class _Distance>
inline _Tp*
value_type(const reverse_bidirectional_iterator<_BidirectionalIterator, _Tp,
_Reference, _Distance>&)
{
return (_Tp*) 0;
}
template <class _BidirectionalIterator, class _Tp, class _Reference,
class _Distance>
inline _Distance*
distance_type(const reverse_bidirectional_iterator<_BidirectionalIterator,
_Tp,
_Reference, _Distance>&)
{
return (_Distance*) 0;
}
#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
template <class _BiIter, class _Tp, class _Ref, class _Distance>
inline bool operator==(
const reverse_bidirectional_iterator<_BiIter, _Tp, _Ref, _Distance>& __x,
const reverse_bidirectional_iterator<_BiIter, _Tp, _Ref, _Distance>& __y)
{
return __x.base() == __y.base();
}
#ifdef __STL_FUNCTION_TMPL_PARTIAL_ORDER
template <class _BiIter, class _Tp, class _Ref, class _Distance>
inline bool operator!=(
const reverse_bidirectional_iterator<_BiIter, _Tp, _Ref, _Distance>& __x,
const reverse_bidirectional_iterator<_BiIter, _Tp, _Ref, _Distance>& __y)
{
return !(__x == __y);
}
#endif /* __STL_FUNCTION_TMPL_PARTIAL_ORDER */
#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
// This is the new version of reverse_iterator, as defined in the
// draft C++ standard. It relies on the iterator_traits template,
// which in turn relies on partial specialization. The class
// reverse_bidirectional_iterator is no longer part of the draft
// standard, but it is retained for backward compatibility.
template <class _Iterator>
class reverse_iterator
{
protected:
_Iterator current;
public:
typedef typename iterator_traits<_Iterator>::iterator_category
iterator_category;
typedef typename iterator_traits<_Iterator>::value_type
value_type;
typedef typename iterator_traits<_Iterator>::difference_type
difference_type;
typedef typename iterator_traits<_Iterator>::pointer
pointer;
typedef typename iterator_traits<_Iterator>::reference
reference;
typedef _Iterator iterator_type;
typedef reverse_iterator<_Iterator> _Self;
public:
reverse_iterator() {}
explicit reverse_iterator(iterator_type __x) : current(__x) {}
reverse_iterator(const _Self& __x) : current(__x.current) {}
#ifdef __STL_MEMBER_TEMPLATES
template <class _Iter>
reverse_iterator(const reverse_iterator<_Iter>& __x)
: current(__x.base()) {}
#endif /* __STL_MEMBER_TEMPLATES */
iterator_type base() const { return current; }
reference operator*() const {
_Iterator __tmp = current;
return *--__tmp;
}
#ifndef __SGI_STL_NO_ARROW_OPERATOR
pointer operator->() const { return &(operator*()); }
#endif /* __SGI_STL_NO_ARROW_OPERATOR */
_Self& operator++() {
--current;
return *this;
}
_Self operator++(int) {
_Self __tmp = *this;
--current;
return __tmp;
}
_Self& operator--() {
++current;
return *this;
}
_Self operator--(int) {
_Self __tmp = *this;
++current;
return __tmp;
}
_Self operator+(difference_type __n) const {
return _Self(current - __n);
}
_Self& operator+=(difference_type __n) {
current -= __n;
return *this;
}
_Self operator-(difference_type __n) const {
return _Self(current + __n);
}
_Self& operator-=(difference_type __n) {
current += __n;
return *this;
}
reference operator[](difference_type __n) const { return *(*this + __n); }
};
template <class _Iterator>
inline bool operator==(const reverse_iterator<_Iterator>& __x,
const reverse_iterator<_Iterator>& __y) {
return __x.base() == __y.base();
}
template <class _Iterator>
inline bool operator<(const reverse_iterator<_Iterator>& __x,
const reverse_iterator<_Iterator>& __y) {
return __y.base() < __x.base();
}
#ifdef __STL_FUNCTION_TMPL_PARTIAL_ORDER
template <class _Iterator>
inline bool operator!=(const reverse_iterator<_Iterator>& __x,
const reverse_iterator<_Iterator>& __y) {
return !(__x == __y);
}
template <class _Iterator>
inline bool operator>(const reverse_iterator<_Iterator>& __x,
const reverse_iterator<_Iterator>& __y) {
return __y < __x;
}
template <class _Iterator>
inline bool operator<=(const reverse_iterator<_Iterator>& __x,
const reverse_iterator<_Iterator>& __y) {
return !(__y < __x);
}
template <class _Iterator>
inline bool operator>=(const reverse_iterator<_Iterator>& __x,
const reverse_iterator<_Iterator>& __y) {
return !(__x < __y);
}
#endif /* __STL_FUNCTION_TMPL_PARTIAL_ORDER */
template <class _Iterator>
inline typename reverse_iterator<_Iterator>::difference_type
operator-(const reverse_iterator<_Iterator>& __x,
const reverse_iterator<_Iterator>& __y) {
return __y.base() - __x.base();
}
template <class _Iterator>
inline reverse_iterator<_Iterator>
operator+(typename reverse_iterator<_Iterator>::difference_type __n,
const reverse_iterator<_Iterator>& __x) {
return reverse_iterator<_Iterator>(__x.base() - __n);
}
#else /* __STL_CLASS_PARTIAL_SPECIALIZATION */
// This is the old version of reverse_iterator, as found in the original
// HP STL. It does not use partial specialization.
template <class _RandomAccessIterator, class _Tp, class _Reference = _Tp&,
class _Distance = ptrdiff_t>
class reverse_iterator {
typedef reverse_iterator<_RandomAccessIterator, _Tp, _Reference, _Distance>
_Self;
protected:
_RandomAccessIterator current;
public:
typedef random_access_iterator_tag iterator_category;
typedef _Tp value_type;
typedef _Distance difference_type;
typedef _Tp* pointer;
typedef _Reference reference;
reverse_iterator() {}
explicit reverse_iterator(_RandomAccessIterator __x) : current(__x) {}
_RandomAccessIterator base() const { return current; }
_Reference operator*() const { return *(current - 1); }
#ifndef __SGI_STL_NO_ARROW_OPERATOR
pointer operator->() const { return &(operator*()); }
#endif /* __SGI_STL_NO_ARROW_OPERATOR */
_Self& operator++() {
--current;
return *this;
}
_Self operator++(int) {
_Self __tmp = *this;
--current;
return __tmp;
}
_Self& operator--() {
++current;
return *this;
}
_Self operator--(int) {
_Self __tmp = *this;
++current;
return __tmp;
}
_Self operator+(_Distance __n) const {
return _Self(current - __n);
}
_Self& operator+=(_Distance __n) {
current -= __n;
return *this;
}
_Self operator-(_Distance __n) const {
return _Self(current + __n);
}
_Self& operator-=(_Distance __n) {
current += __n;
return *this;
}
_Reference operator[](_Distance __n) const { return *(*this + __n); }
};
template <class _RandomAccessIterator, class _Tp,
class _Reference, class _Distance>
inline random_access_iterator_tag
iterator_category(const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>&)
{
return random_access_iterator_tag();
}
template <class _RandomAccessIterator, class _Tp,
class _Reference, class _Distance>
inline _Tp* value_type(const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>&)
{
return (_Tp*) 0;
}
template <class _RandomAccessIterator, class _Tp,
class _Reference, class _Distance>
inline _Distance*
distance_type(const reverse_iterator<_RandomAccessIterator,
_Tp, _Reference, _Distance>&)
{
return (_Distance*) 0;
}
template <class _RandomAccessIterator, class _Tp,
class _Reference, class _Distance>
inline bool
operator==(const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __x,
const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __y)
{
return __x.base() == __y.base();
}
template <class _RandomAccessIterator, class _Tp,
class _Reference, class _Distance>
inline bool
operator<(const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __x,
const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __y)
{
return __y.base() < __x.base();
}
#ifdef __STL_FUNCTION_TMPL_PARTIAL_ORDER
template <class _RandomAccessIterator, class _Tp,
class _Reference, class _Distance>
inline bool
operator!=(const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __x,
const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __y) {
return !(__x == __y);
}
template <class _RandomAccessIterator, class _Tp,
class _Reference, class _Distance>
inline bool
operator>(const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __x,
const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __y) {
return __y < __x;
}
template <class _RandomAccessIterator, class _Tp,
class _Reference, class _Distance>
inline bool
operator<=(const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __x,
const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __y) {
return !(__y < __x);
}
template <class _RandomAccessIterator, class _Tp,
class _Reference, class _Distance>
inline bool
operator>=(const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __x,
const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __y) {
return !(__x < __y);
}
#endif /* __STL_FUNCTION_TMPL_PARTIAL_ORDER */
template <class _RandomAccessIterator, class _Tp,
class _Reference, class _Distance>
inline _Distance
operator-(const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __x,
const reverse_iterator<_RandomAccessIterator, _Tp,
_Reference, _Distance>& __y)
{
return __y.base() - __x.base();
}
template <class _RandAccIter, class _Tp, class _Ref, class _Dist>
inline reverse_iterator<_RandAccIter, _Tp, _Ref, _Dist>
operator+(_Dist __n,
const reverse_iterator<_RandAccIter, _Tp, _Ref, _Dist>& __x)
{
return reverse_iterator<_RandAccIter, _Tp, _Ref, _Dist>(__x.base() - __n);
}
#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
// istream_iterator and ostream_iterator look very different if we're
// using new, templatized iostreams than if we're using the old cfront
// version.
#ifdef __STL_USE_NEW_IOSTREAMS
template <class _Tp,
class _CharT = char, class _Traits = char_traits<_CharT>,
class _Dist = ptrdiff_t>
class istream_iterator {
public:
typedef _CharT char_type;
typedef _Traits traits_type;
typedef basic_istream<_CharT, _Traits> istream_type;
typedef input_iterator_tag iterator_category;
typedef _Tp value_type;
typedef _Dist difference_type;
typedef const _Tp* pointer;
typedef const _Tp& reference;
istream_iterator() : _M_stream(0), _M_ok(false) {}
istream_iterator(istream_type& __s) : _M_stream(&__s) { _M_read(); }
reference operator*() const { return _M_value; }
pointer operator->() const { return &(operator*()); }
istream_iterator& operator++() {
_M_read();
return *this;
}
istream_iterator operator++(int) {
istream_iterator __tmp = *this;
_M_read();
return __tmp;
}
bool _M_equal(const istream_iterator& __x) const
{ return (_M_ok == __x._M_ok) && (!_M_ok || _M_stream == __x._M_stream); }
private:
istream_type* _M_stream;
_Tp _M_value;
bool _M_ok;
void _M_read() {
_M_ok = (_M_stream && *_M_stream) ? true : false;
if (_M_ok) {
*_M_stream >> _M_value;
_M_ok = *_M_stream ? true : false;
}
}
};
template <class _Tp, class _CharT, class _Traits, class _Dist>
inline bool
operator==(const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __x,
const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __y) {
return __x._M_equal(__y);
}
#ifdef __STL_FUNCTION_TMPL_PARTIAL_ORDER
template <class _Tp, class _CharT, class _Traits, class _Dist>
inline bool
operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __x,
const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __y) {
return !__x._M_equal(__y);
}
#endif /* __STL_FUNCTION_TMPL_PARTIAL_ORDER */
template <class _Tp,
class _CharT = char, class _Traits = char_traits<_CharT> >
class ostream_iterator {
public:
typedef _CharT char_type;
typedef _Traits traits_type;
typedef basic_ostream<_CharT, _Traits> ostream_type;
typedef output_iterator_tag iterator_category;
typedef void value_type;
typedef void difference_type;
typedef void pointer;
typedef void reference;
ostream_iterator(ostream_type& __s) : _M_stream(&__s), _M_string(0) {}
ostream_iterator(ostream_type& __s, const _CharT* __c)
: _M_stream(&__s), _M_string(__c) {}
ostream_iterator<_Tp>& operator=(const _Tp& __value) {
*_M_stream << __value;
if (_M_string) *_M_stream << _M_string;
return *this;
}
ostream_iterator<_Tp>& operator*() { return *this; }
ostream_iterator<_Tp>& operator++() { return *this; }
ostream_iterator<_Tp>& operator++(int) { return *this; }
private:
ostream_type* _M_stream;
const _CharT* _M_string;
};
// The default template argument is declared in iosfwd
// We do not read any characters until operator* is called. The first
// time operator* is called, it calls getc. Subsequent calls to getc
// return a cached character, and calls to operator++ use snextc. Before
// operator* or operator++ has been called, _M_is_initialized is false.
template<class _CharT, class _Traits>
class istreambuf_iterator
: public iterator<input_iterator_tag, _CharT,
typename _Traits::off_type, _CharT*, _CharT&>
{
public:
typedef _CharT char_type;
typedef _Traits traits_type;
typedef typename _Traits::int_type int_type;
typedef basic_streambuf<_CharT, _Traits> streambuf_type;
typedef basic_istream<_CharT, _Traits> istream_type;
public:
istreambuf_iterator(streambuf_type* __p = 0) { this->_M_init(__p); }
istreambuf_iterator(istream_type& __is) { this->_M_init(__is.rdbuf()); }
char_type operator*() const
{ return _M_is_initialized ? _M_c : _M_dereference_aux(); }
istreambuf_iterator& operator++() { this->_M_nextc(); return *this; }
istreambuf_iterator operator++(int) {
if (!_M_is_initialized)
_M_postincr_aux();
istreambuf_iterator __tmp = *this;
this->_M_nextc();
return __tmp;
}
bool equal(const istreambuf_iterator& __i) const {
return this->_M_is_initialized && __i._M_is_initialized
? this->_M_eof == __i._M_eof
: this->_M_equal_aux(__i);
}
private:
void _M_init(streambuf_type* __p) {
_M_buf = __p;
_M_eof = !__p;
_M_is_initialized = _M_eof;
}
char_type _M_dereference_aux() const;
bool _M_equal_aux(const istreambuf_iterator&) const;
void _M_postincr_aux();
void _M_nextc() {
int_type __c = _M_buf->snextc();
_M_c = traits_type::to_char_type(__c);
_M_eof = traits_type::eq_int_type(__c, traits_type::eof());
_M_is_initialized = true;
}
void _M_getc() const {
int_type __c = _M_buf->sgetc();
_M_c = traits_type::to_char_type(__c);
_M_eof = traits_type::eq_int_type(__c, traits_type::eof());
_M_is_initialized = true;
}
private:
streambuf_type* _M_buf;
mutable _CharT _M_c;
mutable bool _M_eof : 1;
mutable bool _M_is_initialized : 1;
};
template<class _CharT, class _Traits>
_CharT istreambuf_iterator<_CharT, _Traits>::_M_dereference_aux() const
{
this->_M_getc();
return _M_c;
}
template<class _CharT, class _Traits>
bool istreambuf_iterator<_CharT, _Traits>
::_M_equal_aux(const istreambuf_iterator& __i) const
{
if (!this->_M_is_initialized)
this->_M_getc();
if (!__i._M_is_initialized)
__i._M_getc();
return this->_M_eof == __i._M_eof;
}
template<class _CharT, class _Traits>
void istreambuf_iterator<_CharT, _Traits>::_M_postincr_aux()
{
this->_M_getc();
}
template<class _CharT, class _Traits>
inline bool operator==(const istreambuf_iterator<_CharT, _Traits>& __x,
const istreambuf_iterator<_CharT, _Traits>& __y) {
return __x.equal(__y);
}
#ifdef __STL_FUNCTION_TMPL_PARTIAL_ORDER
template<class _CharT, class _Traits>
inline bool operator!=(const istreambuf_iterator<_CharT, _Traits>& __x,
const istreambuf_iterator<_CharT, _Traits>& __y) {
return !__x.equal(__y);
}
#endif /* __STL_FUNCTION_TMPL_PARTIAL_ORDER */
// The default template argument is declared in iosfwd
template<class _CharT, class _Traits>
class ostreambuf_iterator
: public iterator<output_iterator_tag, void, void, void, void>
{
public:
typedef _CharT char_type;
typedef _Traits traits_type;
typedef typename _Traits::int_type int_type;
typedef basic_streambuf<_CharT, _Traits> streambuf_type;
typedef basic_ostream<_CharT, _Traits> ostream_type;
public:
ostreambuf_iterator(streambuf_type* __buf) : _M_buf(__buf), _M_ok(__buf) {}
ostreambuf_iterator(ostream_type& __o)
: _M_buf(__o.rdbuf()), _M_ok(__o.rdbuf() != 0) {}
ostreambuf_iterator& operator=(char_type __c) {
_M_ok = _M_ok && !traits_type::eq_int_type(_M_buf->sputc(__c),
traits_type::eof());
return *this;
}
ostreambuf_iterator& operator*() { return *this; }
ostreambuf_iterator& operator++() { return *this; }
ostreambuf_iterator& operator++(int) { return *this; }
bool failed() const { return !_M_ok; }
private:
streambuf_type* _M_buf;
bool _M_ok;
};
#else /* __STL_USE_NEW_IOSTREAMS */
template <class _Tp, class _Dist = ptrdiff_t> class istream_iterator;
template <class _Tp, class _Dist>
inline bool operator==(const istream_iterator<_Tp, _Dist>&,
const istream_iterator<_Tp, _Dist>&);
template <class _Tp, class _Dist>
class istream_iterator {
#ifdef __STL_TEMPLATE_FRIENDS
template <class _T1, class _D1>
friend bool operator==(const istream_iterator<_T1, _D1>&,
const istream_iterator<_T1, _D1>&);
#else /* __STL_TEMPLATE_FRIENDS */
friend bool __STD_QUALIFIER
operator== __STL_NULL_TMPL_ARGS (const istream_iterator&,
const istream_iterator&);
#endif /* __STL_TEMPLATE_FRIENDS */
protected:
istream* _M_stream;
_Tp _M_value;
bool _M_end_marker;
void _M_read() {
_M_end_marker = (*_M_stream) ? true : false;
if (_M_end_marker) *_M_stream >> _M_value;
_M_end_marker = (*_M_stream) ? true : false;
}
public:
typedef input_iterator_tag iterator_category;
typedef _Tp value_type;
typedef _Dist difference_type;
typedef const _Tp* pointer;
typedef const _Tp& reference;
istream_iterator() : _M_stream(&cin), _M_end_marker(false) {}
istream_iterator(istream& __s) : _M_stream(&__s) { _M_read(); }
reference operator*() const { return _M_value; }
#ifndef __SGI_STL_NO_ARROW_OPERATOR
pointer operator->() const { return &(operator*()); }
#endif /* __SGI_STL_NO_ARROW_OPERATOR */
istream_iterator<_Tp, _Dist>& operator++() {
_M_read();
return *this;
}
istream_iterator<_Tp, _Dist> operator++(int) {
istream_iterator<_Tp, _Dist> __tmp = *this;
_M_read();
return __tmp;
}
};
#ifndef __STL_CLASS_PARTIAL_SPECIALIZATION
template <class _Tp, class _Dist>
inline input_iterator_tag
iterator_category(const istream_iterator<_Tp, _Dist>&)
{
return input_iterator_tag();
}
template <class _Tp, class _Dist>
inline _Tp*
value_type(const istream_iterator<_Tp, _Dist>&) { return (_Tp*) 0; }
template <class _Tp, class _Dist>
inline _Dist*
distance_type(const istream_iterator<_Tp, _Dist>&) { return (_Dist*)0; }
#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
template <class _Tp, class _Distance>
inline bool operator==(const istream_iterator<_Tp, _Distance>& __x,
const istream_iterator<_Tp, _Distance>& __y) {
return (__x._M_stream == __y._M_stream &&
__x._M_end_marker == __y._M_end_marker) ||
__x._M_end_marker == false && __y._M_end_marker == false;
}
#ifdef __STL_FUNCTION_TMPL_PARTIAL_ORDER
template <class _Tp, class _Distance>
inline bool operator!=(const istream_iterator<_Tp, _Distance>& __x,
const istream_iterator<_Tp, _Distance>& __y) {
return !(__x == __y);
}
#endif /* __STL_FUNCTION_TMPL_PARTIAL_ORDER */
template <class _Tp>
class ostream_iterator {
protected:
ostream* _M_stream;
const char* _M_string;
public:
typedef output_iterator_tag iterator_category;
typedef void value_type;
typedef void difference_type;
typedef void pointer;
typedef void reference;
ostream_iterator(ostream& __s) : _M_stream(&__s), _M_string(0) {}
ostream_iterator(ostream& __s, const char* __c)
: _M_stream(&__s), _M_string(__c) {}
ostream_iterator<_Tp>& operator=(const _Tp& __value) {
*_M_stream << __value;
if (_M_string) *_M_stream << _M_string;
return *this;
}
ostream_iterator<_Tp>& operator*() { return *this; }
ostream_iterator<_Tp>& operator++() { return *this; }
ostream_iterator<_Tp>& operator++(int) { return *this; }
};
#ifndef __STL_CLASS_PARTIAL_SPECIALIZATION
template <class _Tp>
inline output_iterator_tag
iterator_category(const ostream_iterator<_Tp>&) {
return output_iterator_tag();
}
#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
#endif /* __STL_USE_NEW_IOSTREAMS */
// This iterator adapter is 'normal' in the sense that it does not
// change the semantics of any of the operators of its itererator
// parameter. Its primary purpose is to convert an iterator that is
// not a class, e.g. a pointer, into an iterator that is a class.
// The _Container parameter exists solely so that different containers
// using this template can instantiate different types, even if the
// _Iterator parameter is the same.
template<typename _Iterator, typename _Container>
class __normal_iterator
: public iterator<iterator_traits<_Iterator>::iterator_category,
iterator_traits<_Iterator>::value_type,
iterator_traits<_Iterator>::difference_type,
iterator_traits<_Iterator>::pointer,
iterator_traits<_Iterator>::reference>
{
protected:
_Iterator _M_current;
public:
typedef __normal_iterator<_Iterator, _Container> normal_iterator_type;
typedef iterator_traits<_Iterator> __traits_type;
typedef typename __traits_type::iterator_category iterator_category;
typedef typename __traits_type::value_type value_type;
typedef typename __traits_type::difference_type difference_type;
typedef typename __traits_type::pointer pointer;
typedef typename __traits_type::reference reference;
__normal_iterator() : _M_current(_Iterator()) { }
explicit __normal_iterator(const _Iterator& __i) : _M_current(__i) { }
// Allow iterator to const_iterator conversion
template<typename _Iter>
inline __normal_iterator(const __normal_iterator<_Iter, _Container>& __i)
: _M_current(__i.base()) { }
// Forward iterator requirements
reference
operator*() const { return *_M_current; }
pointer
operator->() const { return _M_current; }
normal_iterator_type&
operator++() { ++_M_current; return *this; }
normal_iterator_type
operator++(int) { return __normal_iterator(_M_current++); }
// Bidirectional iterator requirements
normal_iterator_type&
operator--() { --_M_current; return *this; }
normal_iterator_type
operator--(int) { return __normal_iterator(_M_current--); }
// Random access iterator requirements
reference
operator[](const difference_type& __n) const
{ return _M_current[__n]; }
normal_iterator_type&
operator+=(const difference_type& __n)
{ _M_current += __n; return *this; }
normal_iterator_type
operator+(const difference_type& __n) const
{ return __normal_iterator(_M_current + __n); }
normal_iterator_type&
operator-=(const difference_type& __n)
{ _M_current -= __n; return *this; }
normal_iterator_type
operator-(const difference_type& __n) const
{ return __normal_iterator(_M_current - __n); }
difference_type
operator-(const normal_iterator_type& __i) const
{ return _M_current - __i._M_current; }
const _Iterator&
base() const { return _M_current; }
};
// forward iterator requirements
template<typename _IteratorL, typename _IteratorR, typename _Container>
inline bool
operator==(const __normal_iterator<_IteratorL, _Container>& __lhs,
const __normal_iterator<_IteratorR, _Container>& __rhs)
{ return __lhs.base() == __rhs.base(); }
template<typename _IteratorL, typename _IteratorR, typename _Container>
inline bool
operator!=(const __normal_iterator<_IteratorL, _Container>& __lhs,
const __normal_iterator<_IteratorR, _Container>& __rhs)
{ return !(__lhs == __rhs); }
// random access iterator requirements
template<typename _IteratorL, typename _IteratorR, typename _Container>
inline bool
operator<(const __normal_iterator<_IteratorL, _Container>& __lhs,
const __normal_iterator<_IteratorR, _Container>& __rhs)
{ return __lhs.base() < __rhs.base(); }
template<typename _IteratorL, typename _IteratorR, typename _Container>
inline bool
operator>(const __normal_iterator<_IteratorL, _Container>& __lhs,
const __normal_iterator<_IteratorR, _Container>& __rhs)
{ return __rhs < __lhs; }
template<typename _IteratorL, typename _IteratorR, typename _Container>
inline bool
operator<=(const __normal_iterator<_IteratorL, _Container>& __lhs,
const __normal_iterator<_IteratorR, _Container>& __rhs)
{ return !(__rhs < __lhs); }
template<typename _IteratorL, typename _IteratorR, typename _Container>
inline bool
operator>=(const __normal_iterator<_IteratorL, _Container>& __lhs,
const __normal_iterator<_IteratorR, _Container>& __rhs)
{ return !(__lhs < __rhs); }
template<typename _Iterator, typename _Container>
inline __normal_iterator<_Iterator, _Container>
operator+(__normal_iterator<_Iterator, _Container>::difference_type __n,
const __normal_iterator<_Iterator, _Container>& __i)
{ return __normal_iterator<_Iterator, _Container>(__i.base() + __n); }
__STL_END_NAMESPACE
#endif /* __SGI_STL_INTERNAL_ITERATOR_H */
// Local Variables:
// mode:C++
// End:
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