comparison DEPENDENCIES/generic/include/boost/icl/iterator.hpp @ 16:2665513ce2d3

Add boost headers

+/*-----------------------------------------------------------------------------+
+Copyright (c) 2009-2009: Joachim Faulhaber
++------------------------------------------------------------------------------+
+   Distributed under the Boost Software License, Version 1.0.
+      (See accompanying file LICENCE.txt or copy at
+           http://www.boost.org/LICENSE_1_0.txt)
++-----------------------------------------------------------------------------*/
+#ifndef BOOST_ICL_ITERATOR_HPP_JOFA_091003
+#define BOOST_ICL_ITERATOR_HPP_JOFA_091003
+
+#include <iterator>
+#include <boost/config/warning_disable.hpp>
+
+namespace boost{namespace icl
+{
+
+/** \brief Performes an addition using a container's memberfunction add, when operator= is called. */
+template<class ContainerT> class add_iterator
+    : public std::iterator<std::output_iterator_tag, void, void, void, void>
+{
+public:
+    /// The container's type.
+    typedef ContainerT container_type;
+    typedef std::output_iterator_tag iterator_category; 
+
+    /** An add_iterator is constructed with a container and a position 
+        that has to be maintained. */
+    add_iterator(ContainerT& cont, typename ContainerT::iterator iter)
+    : _cont(&cont), _iter(iter) {}
+
+    /** This assignment operator adds the \c value before the current position.
+        It maintains it's position by incrementing after addition.    */
+    add_iterator& operator=(typename ContainerT::const_reference value)
+    {
+        _iter = icl::add(*_cont, _iter, value);
+        if(_iter != _cont->end())
+            ++_iter;
+        return *this;
+    }
+
+    add_iterator& operator*()    { return *this; }
+    add_iterator& operator++()   { return *this; }
+    add_iterator& operator++(int){ return *this; }
+
+private:
+    ContainerT*                   _cont;
+    typename ContainerT::iterator _iter;
+};
+
+
+/** Function adder creates and initializes an add_iterator */
+template<class ContainerT, typename IteratorT>
+inline add_iterator<ContainerT> adder(ContainerT& cont, IteratorT iter_)
+{
+    return add_iterator<ContainerT>(cont, typename ContainerT::iterator(iter_));
+}
+
+/** \brief Performes an insertion using a container's memberfunction add, when operator= is called. */
+template<class ContainerT> class insert_iterator
+    : public std::iterator<std::output_iterator_tag, void, void, void, void>
+{
+public:
+    /// The container's type.
+    typedef ContainerT container_type;
+    typedef std::output_iterator_tag iterator_category; 
+
+    /** An insert_iterator is constructed with a container and a position 
+        that has to be maintained. */
+    insert_iterator(ContainerT& cont, typename ContainerT::iterator iter)
+    : _cont(&cont), _iter(iter) {}
+
+    /** This assignment operator adds the \c value before the current position.
+        It maintains it's position by incrementing after addition.    */
+    insert_iterator& operator=(typename ContainerT::const_reference value)
+    {
+        _iter = _cont->insert(_iter, value);
+        if(_iter != _cont->end())
+            ++_iter;
+        return *this;
+    }
+
+    insert_iterator& operator*()    { return *this; }
+    insert_iterator& operator++()   { return *this; }
+    insert_iterator& operator++(int){ return *this; }
+
+private:
+    ContainerT*                   _cont;
+    typename ContainerT::iterator _iter;
+};
+
+
+/** Function inserter creates and initializes an insert_iterator */
+template<class ContainerT, typename IteratorT>
+inline insert_iterator<ContainerT> inserter(ContainerT& cont, IteratorT iter_)
+{
+    return insert_iterator<ContainerT>(cont, typename ContainerT::iterator(iter_));
+}
+
+}} // namespace icl boost
+
+#endif // BOOST_ICL_ITERATOR_HPP_JOFA_091003
+
+