// Iterators -*- C++ -*-
-// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
-// Free Software Foundation; either version 2, or (at your option)
+// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING. If not, write to the Free
-// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
-// USA.
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
/*
*
#include <bits/cpp_type_traits.h>
#include <ext/type_traits.h>
-#include <bits/stl_move.h>
+#include <bits/move.h>
_GLIBCXX_BEGIN_NAMESPACE(std)
+ /**
+ * @addtogroup iterators
+ * @{
+ */
+
// 24.4.1 Reverse iterators
/**
- * "Bidirectional and random access iterators have corresponding reverse
+ * Bidirectional and random access iterators have corresponding reverse
* %iterator adaptors that iterate through the data structure in the
* opposite direction. They have the same signatures as the corresponding
* iterators. The fundamental relation between a reverse %iterator and its
* &*(reverse_iterator(i)) == &*(i - 1)
* @endcode
*
- * This mapping is dictated by the fact that while there is always a
+ * <em>This mapping is dictated by the fact that while there is always a
* pointer past the end of an array, there might not be a valid pointer
- * before the beginning of an array." [24.4.1]/1,2
+ * before the beginning of an array.</em> [24.4.1]/1,2
*
* Reverse iterators can be tricky and surprising at first. Their
* semantics make sense, however, and the trickiness is a side effect of
protected:
_Iterator current;
- public:
- typedef _Iterator iterator_type;
- typedef typename iterator_traits<_Iterator>::difference_type
- difference_type;
- typedef typename iterator_traits<_Iterator>::reference reference;
- typedef typename iterator_traits<_Iterator>::pointer pointer;
+ typedef iterator_traits<_Iterator> __traits_type;
public:
+ typedef _Iterator iterator_type;
+ typedef typename __traits_type::difference_type difference_type;
+ typedef typename __traits_type::pointer pointer;
+ typedef typename __traits_type::reference reference;
+
/**
* The default constructor default-initializes member @p current.
* If it is a pointer, that means it is zero-initialized.
{ return !(__x < __y); }
template<typename _IteratorL, typename _IteratorR>
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ // DR 685.
+ inline auto
+ operator-(const reverse_iterator<_IteratorL>& __x,
+ const reverse_iterator<_IteratorR>& __y)
+ -> decltype(__y.base() - __x.base())
+#else
inline typename reverse_iterator<_IteratorL>::difference_type
operator-(const reverse_iterator<_IteratorL>& __x,
const reverse_iterator<_IteratorR>& __y)
+#endif
{ return __y.base() - __x.base(); }
//@}
* reference-to-const T for container<T>.
* @return This %iterator, for chained operations.
*
- * This kind of %iterator doesn't really have a "position" in the
+ * This kind of %iterator doesn't really have a @a position in the
* container (you can think of the position as being permanently at
* the end, if you like). Assigning a value to the %iterator will
* always append the value to the end of the container.
operator*()
{ return *this; }
- /// Simply returns *this. (This %iterator does not "move".)
+ /// Simply returns *this. (This %iterator does not @a move.)
back_insert_iterator&
operator++()
{ return *this; }
- /// Simply returns *this. (This %iterator does not "move".)
+ /// Simply returns *this. (This %iterator does not @a move.)
back_insert_iterator
operator++(int)
{ return *this; }
* reference-to-const T for container<T>.
* @return This %iterator, for chained operations.
*
- * This kind of %iterator doesn't really have a "position" in the
+ * This kind of %iterator doesn't really have a @a position in the
* container (you can think of the position as being permanently at
* the front, if you like). Assigning a value to the %iterator will
* always prepend the value to the front of the container.
operator*()
{ return *this; }
- /// Simply returns *this. (This %iterator does not "move".)
+ /// Simply returns *this. (This %iterator does not @a move.)
front_insert_iterator&
operator++()
{ return *this; }
- /// Simply returns *this. (This %iterator does not "move".)
+ /// Simply returns *this. (This %iterator does not @a move.)
front_insert_iterator
operator++(int)
{ return *this; }
operator*()
{ return *this; }
- /// Simply returns *this. (This %iterator does not "move".)
+ /// Simply returns *this. (This %iterator does not @a move.)
insert_iterator&
operator++()
{ return *this; }
- /// Simply returns *this. (This %iterator does not "move".)
+ /// Simply returns *this. (This %iterator does not @a move.)
insert_iterator&
operator++(int)
{ return *this; }
typename _Container::iterator(__i));
}
+ // @} group iterators
+
_GLIBCXX_END_NAMESPACE
_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
- // This iterator adapter is 'normal' in the sense that it does not
+ // This iterator adapter is @a normal in the sense that it does not
// change the semantics of any of the operators of its iterator
// 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.
protected:
_Iterator _M_current;
+ typedef iterator_traits<_Iterator> __traits_type;
+
public:
- typedef _Iterator iterator_type;
- 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>::reference reference;
- typedef typename iterator_traits<_Iterator>::pointer pointer;
+ typedef _Iterator iterator_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::reference reference;
+ typedef typename __traits_type::pointer pointer;
__normal_iterator() : _M_current(_Iterator()) { }
// Note: In what follows, the left- and right-hand-side iterators are
// allowed to vary in types (conceptually in cv-qualification) so that
- // comparaison between cv-qualified and non-cv-qualified iterators be
+ // comparison between cv-qualified and non-cv-qualified iterators be
// valid. However, the greedy and unfriendly operators in std::rel_ops
// will make overload resolution ambiguous (when in scope) if we don't
// provide overloads whose operands are of the same type. Can someone
// operators but also operator- must accept mixed iterator/const_iterator
// parameters.
template<typename _IteratorL, typename _IteratorR, typename _Container>
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+ // DR 685.
+ inline auto
+ operator-(const __normal_iterator<_IteratorL, _Container>& __lhs,
+ const __normal_iterator<_IteratorR, _Container>& __rhs)
+ -> decltype(__lhs.base() - __rhs.base())
+#else
inline typename __normal_iterator<_IteratorL, _Container>::difference_type
operator-(const __normal_iterator<_IteratorL, _Container>& __lhs,
const __normal_iterator<_IteratorR, _Container>& __rhs)
+#endif
{ return __lhs.base() - __rhs.base(); }
template<typename _Iterator, typename _Container>
_GLIBCXX_BEGIN_NAMESPACE(std)
+ /**
+ * @addtogroup iterators
+ * @{
+ */
+
// 24.4.3 Move iterators
/**
- * @if maint
* Class template move_iterator is an iterator adapter with the same
* behavior as the underlying iterator except that its dereference
* operator implicitly converts the value returned by the underlying
* iterator's dereference operator to an rvalue reference. Some
* generic algorithms can be called with move iterators to replace
* copying with moving.
- * @endif
*/
template<typename _Iterator>
class move_iterator
protected:
_Iterator _M_current;
- public:
- typedef _Iterator iterator_type;
- typedef typename iterator_traits<_Iterator>::difference_type
- difference_type;
- typedef typename iterator_traits<_Iterator>::pointer pointer;
- typedef typename iterator_traits<_Iterator>::value_type value_type;
- typedef typename iterator_traits<_Iterator>::iterator_category
- iterator_category;
- typedef value_type&& reference;
+ typedef iterator_traits<_Iterator> __traits_type;
public:
+ typedef _Iterator iterator_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;
+ // NB: DR 680.
+ typedef _Iterator pointer;
+ typedef value_type&& reference;
+
move_iterator()
: _M_current() { }
reference
operator*() const
- { return *_M_current; }
+ { return std::move(*_M_current); }
pointer
operator->() const
reference
operator[](difference_type __n) const
- { return _M_current[__n]; }
+ { return std::move(_M_current[__n]); }
};
template<typename _IteratorL, typename _IteratorR>
const move_iterator<_IteratorR>& __y)
{ return !(__x < __y); }
+ // DR 685.
template<typename _IteratorL, typename _IteratorR>
- inline typename move_iterator<_IteratorL>::difference_type
+ inline auto
operator-(const move_iterator<_IteratorL>& __x,
const move_iterator<_IteratorR>& __y)
+ -> decltype(__x.base() - __y.base())
{ return __x.base() - __y.base(); }
template<typename _Iterator>
make_move_iterator(const _Iterator& __i)
{ return move_iterator<_Iterator>(__i); }
+ // @} group iterators
+
_GLIBCXX_END_NAMESPACE
+#define _GLIBCXX_MAKE_MOVE_ITERATOR(_Iter) std::make_move_iterator(_Iter)
+#else
+#define _GLIBCXX_MAKE_MOVE_ITERATOR(_Iter) (_Iter)
#endif // __GXX_EXPERIMENTAL_CXX0X__
#endif
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