comparison DEPENDENCIES/generic/include/boost/circular_buffer/space_optimized.hpp @ 16:2665513ce2d3

Add boost headers

+// Implementation of the circular buffer adaptor.
+
+// Copyright (c) 2003-2008 Jan Gaspar
+// Copyright (c) 2013  Paul A. Bristow // Doxygen comments changed for new version of documentation.
+// Copyright (c) 2013  Antony Polukhin // Move semantics implementation.
+
+// Use, modification, and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#if !defined(BOOST_CIRCULAR_BUFFER_SPACE_OPTIMIZED_HPP)
+#define BOOST_CIRCULAR_BUFFER_SPACE_OPTIMIZED_HPP
+
+#if defined(_MSC_VER) && _MSC_VER >= 1200
+    #pragma once
+#endif
+
+#include <boost/type_traits/is_same.hpp>
+#include <boost/detail/workaround.hpp>
+
+namespace boost {
+
+/*!
+    \class circular_buffer_space_optimized
+    \brief Space optimized circular buffer container adaptor. 
+           <code>T</code> must be a copyable class or must have an noexcept move constructor
+           and move assignment operator.
+*/
+template <class T, class Alloc>
+class circular_buffer_space_optimized :
+/*! \cond */
+#if BOOST_CB_ENABLE_DEBUG
+public
+#endif
+/*! \endcond */
+circular_buffer<T, Alloc> {
+public:
+// Typedefs
+
+    typedef typename circular_buffer<T, Alloc>::value_type value_type;
+    typedef typename circular_buffer<T, Alloc>::pointer pointer;
+    typedef typename circular_buffer<T, Alloc>::const_pointer const_pointer;
+    typedef typename circular_buffer<T, Alloc>::reference reference;
+    typedef typename circular_buffer<T, Alloc>::const_reference const_reference;
+    typedef typename circular_buffer<T, Alloc>::size_type size_type;
+    typedef typename circular_buffer<T, Alloc>::difference_type difference_type;
+    typedef typename circular_buffer<T, Alloc>::allocator_type allocator_type;
+    typedef typename circular_buffer<T, Alloc>::const_iterator const_iterator;
+    typedef typename circular_buffer<T, Alloc>::iterator iterator;
+    typedef typename circular_buffer<T, Alloc>::const_reverse_iterator const_reverse_iterator;
+    typedef typename circular_buffer<T, Alloc>::reverse_iterator reverse_iterator;
+    typedef typename circular_buffer<T, Alloc>::array_range array_range;
+    typedef typename circular_buffer<T, Alloc>::const_array_range const_array_range;
+    typedef typename circular_buffer<T, Alloc>::param_value_type param_value_type;
+    typedef typename circular_buffer<T, Alloc>::rvalue_type rvalue_type;
+    //typedef typename circular_buffer<T, Alloc>::return_value_type return_value_type;
+
+/* <pre> is not passed through to html or pdf. So <br> is used in code section below.  Ugly :-(
+Ideally want a link to capacity_control, but this would require include details
+and this would expose all the functions in details.
+There must be a better way of doing this.
+*/
+
+    /*! Capacity controller of the space optimized circular buffer.
+
+    \see capacity_control in details.hpp.
+<p>
+<code>
+class capacity_control<br>
+{<br>
+   size_type m_capacity;  // Available capacity.<br>
+   size_type m_min_capacity; // Minimum capacity.<br>
+public:<br>
+   capacity_control(size_type capacity, size_type min_capacity = 0)<br>
+   : m_capacity(capacity), m_min_capacity(min_capacity)<br>
+     {};<br>
+   size_type %capacity() const { return m_capacity; }<br>
+   size_type min_capacity() const { return m_min_capacity; }<br>
+   operator size_type() const { return m_capacity; }<br>
+};<br>
+</code>
+</p>
+
+
+  <p>Always
+    <code>capacity >= min_capacity</code>.
+  </p>
+  <p>
+    The <code>capacity()</code> represents the capacity
+    of the <code>circular_buffer_space_optimized</code> and
+    the <code>min_capacity()</code> determines the minimal allocated size of its internal buffer.
+ </p>
+ <p>The converting constructor of the <code>capacity_control</code> allows implicit conversion from
+  <code>size_type</code>-like types which ensures compatibility of creating an instance of the
+  <code>circular_buffer_space_optimized</code> with other STL containers.
+
+  On the other hand the operator <code>%size_type()</code>
+  provides implicit conversion to the <code>size_type</code> which allows to treat the
+  capacity of the <code>circular_buffer_space_optimized</code> the same way as in the
+  <code>circular_buffer</a></code>.
+</p>
+    */
+    typedef cb_details::capacity_control<size_type> capacity_type;
+
+// Inherited
+
+    using circular_buffer<T, Alloc>::get_allocator;
+    using circular_buffer<T, Alloc>::begin;
+    using circular_buffer<T, Alloc>::end;
+    using circular_buffer<T, Alloc>::rbegin;
+    using circular_buffer<T, Alloc>::rend;
+    using circular_buffer<T, Alloc>::at;
+    using circular_buffer<T, Alloc>::front;
+    using circular_buffer<T, Alloc>::back;
+    using circular_buffer<T, Alloc>::array_one;
+    using circular_buffer<T, Alloc>::array_two;
+    using circular_buffer<T, Alloc>::linearize;
+    using circular_buffer<T, Alloc>::is_linearized;
+    using circular_buffer<T, Alloc>::rotate;
+    using circular_buffer<T, Alloc>::size;
+    using circular_buffer<T, Alloc>::max_size;
+    using circular_buffer<T, Alloc>::empty;
+
+#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
+    reference operator [] (size_type n) { return circular_buffer<T, Alloc>::operator[](n); }
+    const_reference operator [] (size_type n) const { return circular_buffer<T, Alloc>::operator[](n); }
+#else
+    using circular_buffer<T, Alloc>::operator[];
+#endif
+
+private:
+// Member variables
+
+    //! The capacity controller of the space optimized circular buffer.
+    capacity_type m_capacity_ctrl;
+
+public:
+// Overridden
+
+    //! Is the <code>circular_buffer_space_optimized</code> full?
+    /*!
+        \return <code>true</code> if the number of elements stored in the <code>circular_buffer_space_optimized</code>
+                equals the capacity of the <code>circular_buffer_space_optimized</code>; <code>false</code> otherwise.
+        \throws Nothing.
+        \par Exception Safety
+             No-throw.
+        \par Iterator Invalidation
+             Does not invalidate any iterators.
+        \par Complexity
+             Constant (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>empty()</code>
+    */
+    bool full() const BOOST_NOEXCEPT { return m_capacity_ctrl == size(); }
+
+    /*! \brief Get the maximum number of elements which can be inserted into the
+               <code>circular_buffer_space_optimized</code> without overwriting any of already stored elements.
+        \return <code>capacity().%capacity() - size()</code>
+        \throws Nothing.
+        \par Exception Safety
+             No-throw.
+        \par Iterator Invalidation
+             Does not invalidate any iterators.
+        \par Complexity
+             Constant (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>capacity()</code>, <code>size()</code>, <code>max_size()</code>
+    */
+    size_type reserve() const BOOST_NOEXCEPT { return m_capacity_ctrl - size(); }
+
+    //! Get the capacity of the <code>circular_buffer_space_optimized</code>.
+    /*!
+        \return The capacity controller representing the maximum number of elements which can be stored in the
+                <code>circular_buffer_space_optimized</code> and the minimal allocated size of the internal buffer.
+        \throws Nothing.
+        \par Exception Safety
+             No-throw.
+        \par Iterator Invalidation
+             Does not invalidate any iterators.
+        \par Complexity
+             Constant (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>reserve()</code>, <code>size()</code>, <code>max_size()</code>,
+            <code>set_capacity(const capacity_type&)</code>
+    */
+    const capacity_type& capacity() const BOOST_NOEXCEPT { return m_capacity_ctrl; }
+
+#if defined(BOOST_CB_TEST)
+
+    // Return the current capacity of the adapted circular buffer.
+    /*
+       \note This method is not intended to be used directly by the user.
+             It is defined only for testing purposes.
+    */
+    size_type internal_capacity() const BOOST_NOEXCEPT { return circular_buffer<T, Alloc>::capacity(); }
+
+#endif // #if defined(BOOST_CB_TEST)
+
+    /*! \brief Change the capacity (and the minimal guaranteed amount of allocated memory) of the
+               <code>circular_buffer_space_optimized</code>.
+        \post <code>capacity() == capacity_ctrl \&\& size() \<= capacity_ctrl.capacity()</code><br><br>
+              If the current number of elements stored in the <code>circular_buffer_space_optimized</code> is greater
+              than the desired new capacity then number of <code>[size() - capacity_ctrl.capacity()]</code> <b>last</b>
+              elements will be removed and the new size will be equal to <code>capacity_ctrl.capacity()</code>.<br><br>
+              If the current number of elements stored in the <code>circular_buffer_space_optimized</code> is lower
+              than the new capacity then the amount of allocated memory in the internal buffer may be accommodated as
+              necessary but it will never drop below <code>capacity_ctrl.min_capacity()</code>.
+        \param capacity_ctrl The new capacity controller.
+        \throws "An allocation error" if memory is exhausted, (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws or nothing if <code>T::T(T&&)</code> is noexcept.
+        \par Exception Safety
+             Strong.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in <code>min[size(), capacity_ctrl.%capacity()]</code>).
+        \note To explicitly clear the extra allocated memory use the <b>shrink-to-fit</b> technique:<br><br>
+              <code>%boost::%circular_buffer_space_optimized\<int\> cb(1000);<br>
+              ...<br>
+              %boost::%circular_buffer_space_optimized\<int\>(cb).swap(cb);</code><br><br>
+              For more information about the shrink-to-fit technique in STL see
+              <a href="http://www.gotw.ca/gotw/054.htm">http://www.gotw.ca/gotw/054.htm</a>.
+        \sa <code>rset_capacity(const capacity_type&)</code>,
+            <code>\link resize() resize(size_type, const_reference)\endlink</code>
+    */
+    void set_capacity(const capacity_type& capacity_ctrl) {
+        m_capacity_ctrl = capacity_ctrl;
+        if (capacity_ctrl < size()) {
+            iterator e = end();
+            circular_buffer<T, Alloc>::erase(e - (size() - capacity_ctrl), e);
+        }
+        adjust_min_capacity();
+    }
+
+    //! Change the size of the <code>circular_buffer_space_optimized</code>.
+    /*!
+        \post <code>size() == new_size \&\& capacity().%capacity() >= new_size</code><br><br>
+              If the new size is greater than the current size, copies of <code>item</code> will be inserted at the
+              <b>back</b> of the of the <code>circular_buffer_space_optimized</code> in order to achieve the desired
+              size. In the case the resulting size exceeds the current capacity the capacity will be set to
+              <code>new_size</code>.<br><br>
+              If the current number of elements stored in the <code>circular_buffer_space_optimized</code> is greater
+              than the desired new size then number of <code>[size() - new_size]</code> <b>last</b> elements will be
+              removed. (The capacity will remain unchanged.)<br><br>
+              The amount of allocated memory in the internal buffer may be accommodated as necessary.
+        \param new_size The new size.
+        \param item The element the <code>circular_buffer_space_optimized</code> will be filled with in order to gain
+                    the requested size. (See the <i>Effect</i>.)
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the new size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link rresize() rresize(size_type, const_reference)\endlink</code>,
+            <code>set_capacity(const capacity_type&)</code>
+    */
+    void resize(size_type new_size, param_value_type item = value_type()) {
+        if (new_size > size()) {
+            if (new_size > m_capacity_ctrl)
+                m_capacity_ctrl = capacity_type(new_size, m_capacity_ctrl.min_capacity());
+            insert(end(), new_size - size(), item);
+        } else {
+            iterator e = end();
+            erase(e - (size() - new_size), e);
+        }
+    }
+
+    /*! \brief Change the capacity (and the minimal guaranteed amount of allocated memory) of the
+               <code>circular_buffer_space_optimized</code>.
+        \post <code>capacity() == capacity_ctrl \&\& size() \<= capacity_ctrl</code><br><br>
+              If the current number of elements stored in the <code>circular_buffer_space_optimized</code> is greater
+              than the desired new capacity then number of <code>[size() - capacity_ctrl.capacity()]</code>
+              <b>first</b> elements will be removed and the new size will be equal to
+              <code>capacity_ctrl.capacity()</code>.<br><br>
+              If the current number of elements stored in the <code>circular_buffer_space_optimized</code> is lower
+              than the new capacity then the amount of allocated memory in the internal buffer may be accommodated as
+              necessary but it will never drop below <code>capacity_ctrl.min_capacity()</code>.
+        \param capacity_ctrl The new capacity controller.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws or nothing if <code>T::T(T&&)</code> is noexcept.
+        \par Exception Safety
+             Strong.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in <code>min[size(), capacity_ctrl.%capacity()]</code>).
+        \sa <code>set_capacity(const capacity_type&)</code>,
+            <code>\link rresize() rresize(size_type, const_reference)\endlink</code>
+    */
+    void rset_capacity(const capacity_type& capacity_ctrl) {
+        m_capacity_ctrl = capacity_ctrl;
+        if (capacity_ctrl < size()) {
+            iterator b = begin();
+            circular_buffer<T, Alloc>::rerase(b, b + (size() - capacity_ctrl));
+        }
+        adjust_min_capacity();
+    }
+
+    //! Change the size of the <code>circular_buffer_space_optimized</code>.
+    /*!
+        \post <code>size() == new_size \&\& capacity().%capacity() >= new_size</code><br><br>
+              If the new size is greater than the current size, copies of <code>item</code> will be inserted at the
+              <b>front</b> of the of the <code>circular_buffer_space_optimized</code> in order to achieve the desired
+              size. In the case the resulting size exceeds the current capacity the capacity will be set to
+              <code>new_size</code>.<br><br>
+              If the current number of elements stored in the <code>circular_buffer_space_optimized</code> is greater
+              than the desired new size then number of <code>[size() - new_size]</code> <b>first</b> elements will be
+              removed. (The capacity will remain unchanged.)<br><br>
+              The amount of allocated memory in the internal buffer may be accommodated as necessary.
+        \param new_size The new size.
+        \param item The element the <code>circular_buffer_space_optimized</code> will be filled with in order to gain
+                    the requested size. (See the <i>Effect</i>.)
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the new size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link resize() resize(size_type, const_reference)\endlink</code>,
+            <code>rset_capacity(const capacity_type&)</code>
+    */
+    void rresize(size_type new_size, param_value_type item = value_type()) {
+        if (new_size > size()) {
+            if (new_size > m_capacity_ctrl)
+                m_capacity_ctrl = capacity_type(new_size, m_capacity_ctrl.min_capacity());
+            rinsert(begin(), new_size - size(), item);
+        } else {
+            rerase(begin(), end() - new_size);
+        }
+    }
+
+    //! Create an empty space optimized circular buffer with zero capacity.
+    /*!
+        \post <code>capacity().%capacity() == 0 \&\& capacity().min_capacity() == 0 \&\& size() == 0</code>
+        \param alloc The allocator.
+        \throws Nothing.
+        \par Complexity
+             Constant.
+        \warning Since Boost version 1.36 the behaviour of this constructor has changed. Now it creates a space
+                 optimized circular buffer with zero capacity.
+    */
+    explicit circular_buffer_space_optimized(const allocator_type& alloc = allocator_type()) BOOST_NOEXCEPT
+    : circular_buffer<T, Alloc>(0, alloc)
+    , m_capacity_ctrl(0) {}
+
+    //! Create an empty space optimized circular buffer with the specified capacity.
+    /*!
+        \post <code>capacity() == capacity_ctrl \&\& size() == 0</code><br><br>
+              The amount of allocated memory in the internal buffer is <code>capacity_ctrl.min_capacity()</code>.
+        \param capacity_ctrl The capacity controller representing the maximum number of elements which can be stored in
+                             the <code>circular_buffer_space_optimized</code> and the minimal allocated size of the
+                             internal buffer.
+        \param alloc The allocator.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+        \par Complexity
+             Constant.
+    */
+    explicit circular_buffer_space_optimized(capacity_type capacity_ctrl,
+        const allocator_type& alloc = allocator_type())
+    : circular_buffer<T, Alloc>(capacity_ctrl.min_capacity(), alloc)
+    , m_capacity_ctrl(capacity_ctrl) {}
+
+    /*! \brief Create a full space optimized circular buffer with the specified capacity filled with
+               <code>capacity_ctrl.%capacity()</code> copies of <code>item</code>.
+        \post <code>capacity() == capacity_ctrl \&\& full() \&\& (*this)[0] == item \&\& (*this)[1] == item \&\& ...
+              \&\& (*this) [capacity_ctrl.%capacity() - 1] == item </code><br><br>
+              The amount of allocated memory in the internal buffer is <code>capacity_ctrl.capacity()</code>.
+        \param capacity_ctrl The capacity controller representing the maximum number of elements which can be stored in
+                             the <code>circular_buffer_space_optimized</code> and the minimal allocated size of the
+                             internal buffer.
+        \param item The element the created <code>circular_buffer_space_optimized</code> will be filled with.
+        \param alloc The allocator.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+        \throws Whatever <code>T::T(const T&)</code> throws.
+        \par Complexity
+             Linear (in the <code>capacity_ctrl.%capacity()</code>).
+    */
+    circular_buffer_space_optimized(capacity_type capacity_ctrl, param_value_type item,
+        const allocator_type& alloc = allocator_type())
+    : circular_buffer<T, Alloc>(capacity_ctrl.capacity(), item, alloc)
+    , m_capacity_ctrl(capacity_ctrl) {}
+
+    /*! \brief Create a space optimized circular buffer with the specified capacity filled with <code>n</code> copies
+               of <code>item</code>.
+        \pre <code>capacity_ctrl.%capacity() >= n</code>
+        \post <code>capacity() == capacity_ctrl \&\& size() == n \&\& (*this)[0] == item \&\& (*this)[1] == item
+              \&\& ... \&\& (*this)[n - 1] == item</code><br><br>
+              The amount of allocated memory in the internal buffer is
+              <code>max[n, capacity_ctrl.min_capacity()]</code>.
+        \param capacity_ctrl The capacity controller representing the maximum number of elements which can be stored in
+                             the <code>circular_buffer_space_optimized</code> and the minimal allocated size of the
+                             internal buffer.
+        \param n The number of elements the created <code>circular_buffer_space_optimized</code> will be filled with.
+        \param item The element the created <code>circular_buffer_space_optimized</code> will be filled with.
+        \param alloc The allocator.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+        \par Complexity
+             Linear (in the <code>n</code>).
+    */
+    circular_buffer_space_optimized(capacity_type capacity_ctrl, size_type n, param_value_type item,
+        const allocator_type& alloc = allocator_type())
+    : circular_buffer<T, Alloc>(init_capacity(capacity_ctrl, n), n, item, alloc)
+    , m_capacity_ctrl(capacity_ctrl) {}
+
+#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+
+    /*! \cond */
+    circular_buffer_space_optimized(const circular_buffer_space_optimized<T, Alloc>& cb)
+    : circular_buffer<T, Alloc>(cb.begin(), cb.end())
+    , m_capacity_ctrl(cb.m_capacity_ctrl) {}
+
+    template <class InputIterator>
+    circular_buffer_space_optimized(InputIterator first, InputIterator last)
+    : circular_buffer<T, Alloc>(first, last)
+    , m_capacity_ctrl(circular_buffer<T, Alloc>::capacity()) {}
+
+    template <class InputIterator>
+    circular_buffer_space_optimized(capacity_type capacity_ctrl, InputIterator first, InputIterator last)
+    : circular_buffer<T, Alloc>(
+        init_capacity(capacity_ctrl, first, last, is_integral<InputIterator>()),
+        first, last)
+    , m_capacity_ctrl(capacity_ctrl) {
+        reduce_capacity(
+            is_same< BOOST_DEDUCED_TYPENAME BOOST_ITERATOR_CATEGORY<InputIterator>::type, std::input_iterator_tag >());
+    }
+    /*! \endcond */
+
+#else
+
+    //! The copy constructor.
+    /*!
+        Creates a copy of the specified <code>circular_buffer_space_optimized</code>.
+        \post <code>*this == cb</code><br><br>
+              The amount of allocated memory in the internal buffer is <code>cb.size()</code>.
+        \param cb The <code>circular_buffer_space_optimized</code> to be copied.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+        \par Complexity
+             Linear (in the size of <code>cb</code>).
+    */
+    circular_buffer_space_optimized(const circular_buffer_space_optimized<T, Alloc>& cb)
+    : circular_buffer<T, Alloc>(cb.begin(), cb.end(), cb.get_allocator())
+    , m_capacity_ctrl(cb.m_capacity_ctrl) {}
+
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+    //! The move constructor.
+    /*! \brief Move constructs a <code>circular_buffer_space_optimized</code> from <code>cb</code>, 
+                leaving <code>cb</code> empty.
+        \pre C++ compiler with rvalue references support.
+        \post <code>cb.empty()</code>
+        \param cb <code>circular_buffer</code> to 'steal' value from.
+        \throws Nothing.
+        \par Constant.
+    */
+    circular_buffer_space_optimized(circular_buffer_space_optimized<T, Alloc>&& cb) BOOST_NOEXCEPT
+    : circular_buffer<T, Alloc>()
+    , m_capacity_ctrl(0) {
+        cb.swap(*this);
+    }
+#endif // BOOST_NO_CXX11_RVALUE_REFERENCES
+
+    //! Create a full space optimized circular buffer filled with a copy of the range.
+    /*!
+        \pre Valid range <code>[first, last)</code>.<br>
+             <code>first</code> and <code>last</code> have to meet the requirements of
+             <a href="http://www.sgi.com/tech/stl/InputIterator.html">InputIterator</a>.
+        \post <code>capacity().%capacity() == std::distance(first, last) \&\& capacity().min_capacity() == 0 \&\&
+              full() \&\& (*this)[0]== *first \&\& (*this)[1] == *(first + 1) \&\& ... \&\&
+              (*this)[std::distance(first, last) - 1] == *(last - 1)</code><br><br>
+              The amount of allocated memory in the internal buffer is <code>std::distance(first, last)</code>.
+        \param first The beginning of the range to be copied.
+        \param last The end of the range to be copied.
+        \param alloc The allocator.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws or nothing if <code>T::T(T&&)</code> is noexcept 
+                and <code>InputIterator</code> is a move iterator.
+        \par Complexity
+             Linear (in the <code>std::distance(first, last)</code>).
+    */
+    template <class InputIterator>
+    circular_buffer_space_optimized(InputIterator first, InputIterator last,
+        const allocator_type& alloc = allocator_type())
+    : circular_buffer<T, Alloc>(first, last, alloc)
+    , m_capacity_ctrl(circular_buffer<T, Alloc>::capacity()) {}
+
+    /*! \brief Create a space optimized circular buffer with the specified capacity (and the minimal guaranteed amount
+               of allocated memory) filled with a copy of the range.
+        \pre Valid range <code>[first, last)</code>.<br>
+             <code>first</code> and <code>last</code> have to meet the requirements of
+             <a href="http://www.sgi.com/tech/stl/InputIterator.html">InputIterator</a>.
+        \post <code>capacity() == capacity_ctrl \&\& size() \<= std::distance(first, last) \&\& (*this)[0]==
+              *(last - capacity_ctrl.%capacity()) \&\& (*this)[1] == *(last - capacity_ctrl.%capacity() + 1) \&\& ...
+              \&\& (*this)[capacity_ctrl.%capacity() - 1] == *(last - 1)</code><br><br>
+              If the number of items to be copied from the range <code>[first, last)</code> is greater than the
+              specified <code>capacity_ctrl.%capacity()</code> then only elements from the range
+              <code>[last - capacity_ctrl.%capacity(), last)</code> will be copied.<br><br>
+              The amount of allocated memory in the internal buffer is <code>max[capacity_ctrl.min_capacity(),
+              min[capacity_ctrl.%capacity(), std::distance(first, last)]]</code>.
+        \param capacity_ctrl The capacity controller representing the maximum number of elements which can be stored in
+                             the <code>circular_buffer_space_optimized</code> and the minimal allocated size of the
+                             internal buffer.
+        \param first The beginning of the range to be copied.
+        \param last The end of the range to be copied.
+        \param alloc The allocator.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+        \par Complexity
+             Linear (in <code>std::distance(first, last)</code>; in
+             <code>min[capacity_ctrl.%capacity(), std::distance(first, last)]</code> if the <code>InputIterator</code>
+             is a <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">RandomAccessIterator</a>).
+    */
+    template <class InputIterator>
+    circular_buffer_space_optimized(capacity_type capacity_ctrl, InputIterator first, InputIterator last,
+        const allocator_type& alloc = allocator_type())
+    : circular_buffer<T, Alloc>(
+        init_capacity(capacity_ctrl, first, last, is_integral<InputIterator>()),
+        first, last, alloc)
+    , m_capacity_ctrl(capacity_ctrl) {
+        reduce_capacity(
+            is_same< BOOST_DEDUCED_TYPENAME BOOST_ITERATOR_CATEGORY<InputIterator>::type, std::input_iterator_tag >());
+    }
+
+#endif // #if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+
+#if defined(BOOST_CB_NEVER_DEFINED)
+// This section will never be compiled - the default destructor will be generated instead.
+// Declared only for documentation purpose.
+
+    //! The destructor.
+    /*!
+        Destroys the <code>circular_buffer_space_optimized</code>.
+        \throws Nothing.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (including
+             iterators equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>clear()</code>
+    */
+    ~circular_buffer_space_optimized();
+
+    //! no-comment
+    void erase_begin(size_type n);
+
+    //! no-comment
+    void erase_end(size_type n);
+
+#endif // #if defined(BOOST_CB_NEVER_DEFINED)
+
+    //! The assign operator.
+    /*!
+        Makes this <code>circular_buffer_space_optimized</code> to become a copy of the specified
+        <code>circular_buffer_space_optimized</code>.
+        \post <code>*this == cb</code><br><br>
+              The amount of allocated memory in the internal buffer is <code>cb.size()</code>.
+        \param cb The <code>circular_buffer_space_optimized</code> to be copied.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+        \throws Whatever <code>T::T(const T&)</code> throws.
+        \par Exception Safety
+             Strong.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to this <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of <code>cb</code>).
+        \sa <code>\link assign(size_type, param_value_type) assign(size_type, const_reference)\endlink</code>,
+            <code>\link assign(capacity_type, size_type, param_value_type)
+            assign(capacity_type, size_type, const_reference)\endlink</code>,
+            <code>assign(InputIterator, InputIterator)</code>,
+            <code>assign(capacity_type, InputIterator, InputIterator)</code>
+    */
+    circular_buffer_space_optimized<T, Alloc>& operator = (const circular_buffer_space_optimized<T, Alloc>& cb) {
+        if (this == &cb)
+            return *this;
+        circular_buffer<T, Alloc>::assign(cb.begin(), cb.end());
+        m_capacity_ctrl = cb.m_capacity_ctrl;
+        return *this;
+    }
+
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+    /*! \brief Move assigns content of <code>cb</code> to <code>*this</code>, leaving <code>cb</code> empty.
+        \pre C++ compiler with rvalue references support.
+        \post <code>cb.empty()</code>
+        \param cb <code>circular_buffer</code> to 'steal' value from.
+        \throws Nothing.
+        \par Complexity
+             Constant.
+    */
+    circular_buffer_space_optimized<T, Alloc>& operator = (circular_buffer_space_optimized<T, Alloc>&& cb) BOOST_NOEXCEPT {
+        cb.swap(*this); // now `this` holds `cb`
+        circular_buffer<T, Alloc>(get_allocator()) // temprary that holds initial `cb` allocator
+            .swap(cb); // makes `cb` empty
+        return *this;
+    }
+#endif // BOOST_NO_CXX11_RVALUE_REFERENCES
+
+
+    //! Assign <code>n</code> items into the space optimized circular buffer.
+    /*!
+        The content of the <code>circular_buffer_space_optimized</code> will be removed and replaced with
+        <code>n</code> copies of the <code>item</code>.
+        \post <code>capacity().%capacity() == n \&\& capacity().min_capacity() == 0 \&\& size() == n \&\& (*this)[0] ==
+              item \&\& (*this)[1] == item \&\& ... \&\& (*this) [n - 1] == item</code><br><br>
+              The amount of allocated memory in the internal buffer is <code>n</code>.
+        \param n The number of elements the <code>circular_buffer_space_optimized</code> will be filled with.
+        \param item The element the <code>circular_buffer_space_optimized</code> will be filled with.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the <code>n</code>).
+        \sa <code>\link operator=(const circular_buffer_space_optimized&) operator=\endlink</code>,
+            <code>\link assign(capacity_type, size_type, param_value_type)
+            assign(capacity_type, size_type, const_reference)\endlink</code>,
+            <code>assign(InputIterator, InputIterator)</code>,
+            <code>assign(capacity_type, InputIterator, InputIterator)</code>
+    */
+    void assign(size_type n, param_value_type item) {
+        circular_buffer<T, Alloc>::assign(n, item);
+        m_capacity_ctrl = capacity_type(n);
+    }
+
+    //! Assign <code>n</code> items into the space optimized circular buffer specifying the capacity.
+    /*!
+        The capacity of the <code>circular_buffer_space_optimized</code> will be set to the specified value and the
+        content of the <code>circular_buffer_space_optimized</code> will be removed and replaced with <code>n</code>
+        copies of the <code>item</code>.
+        \pre <code>capacity_ctrl.%capacity() >= n</code>
+        \post <code>capacity() == capacity_ctrl \&\& size() == n \&\& (*this)[0] == item \&\& (*this)[1] == item
+              \&\& ... \&\& (*this) [n - 1] == item </code><br><br>
+              The amount of allocated memory will be <code>max[n, capacity_ctrl.min_capacity()]</code>.
+        \param capacity_ctrl The new capacity controller.
+        \param n The number of elements the <code>circular_buffer_space_optimized</code> will be filled with.
+        \param item The element the <code>circular_buffer_space_optimized</code> will be filled with.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the <code>n</code>).
+        \sa <code>\link operator=(const circular_buffer_space_optimized&) operator=\endlink</code>,
+            <code>\link assign(size_type, param_value_type) assign(size_type, const_reference)\endlink</code>,
+            <code>assign(InputIterator, InputIterator)</code>,
+            <code>assign(capacity_type, InputIterator, InputIterator)</code>
+    */
+    void assign(capacity_type capacity_ctrl, size_type n, param_value_type item) {
+       BOOST_CB_ASSERT(capacity_ctrl.capacity() >= n); // check for new capacity lower than n
+       circular_buffer<T, Alloc>::assign((std::max)(capacity_ctrl.min_capacity(), n), n, item);
+       m_capacity_ctrl = capacity_ctrl;
+    }
+
+    //! Assign a copy of the range into the space optimized circular buffer.
+    /*!
+        The content of the <code>circular_buffer_space_optimized</code> will be removed and replaced with copies of
+        elements from the specified range.
+        \pre Valid range <code>[first, last)</code>.<br>
+             <code>first</code> and <code>last</code> have to meet the requirements of
+             <a href="http://www.sgi.com/tech/stl/InputIterator.html">InputIterator</a>.
+        \post <code>capacity().%capacity() == std::distance(first, last) \&\& capacity().min_capacity() == 0 \&\&
+              size() == std::distance(first, last) \&\& (*this)[0]== *first \&\& (*this)[1] == *(first + 1) \&\& ...
+              \&\& (*this)[std::distance(first, last) - 1] == *(last - 1)</code><br><br>
+              The amount of allocated memory in the internal buffer is <code>std::distance(first, last)</code>.
+        \param first The beginning of the range to be copied.
+        \param last The end of the range to be copied.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws or nothing if <code>T::T(T&&)</code> is noexcept and 
+                <code>InputIterator</code> is a move iterator.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the <code>std::distance(first, last)</code>).
+        \sa <code>\link operator=(const circular_buffer_space_optimized&) operator=\endlink</code>,
+            <code>\link assign(size_type, param_value_type) assign(size_type, const_reference)\endlink</code>,
+            <code>\link assign(capacity_type, size_type, param_value_type)
+            assign(capacity_type, size_type, const_reference)\endlink</code>,
+            <code>assign(capacity_type, InputIterator, InputIterator)</code>
+    */
+    template <class InputIterator>
+    void assign(InputIterator first, InputIterator last) {
+        circular_buffer<T, Alloc>::assign(first, last);
+        m_capacity_ctrl = capacity_type(circular_buffer<T, Alloc>::capacity());
+    }
+
+    //! Assign a copy of the range into the space optimized circular buffer specifying the capacity.
+    /*!
+        The capacity of the <code>circular_buffer_space_optimized</code> will be set to the specified value and the
+        content of the <code>circular_buffer_space_optimized</code> will be removed and replaced with copies of
+        elements from the specified range.
+        \pre Valid range <code>[first, last)</code>.<br>
+             <code>first</code> and <code>last</code> have to meet the requirements of
+             <a href="http://www.sgi.com/tech/stl/InputIterator.html">InputIterator</a>.
+        \post <code>capacity() == capacity_ctrl \&\& size() \<= std::distance(first, last) \&\&
+             (*this)[0]== *(last - capacity) \&\& (*this)[1] == *(last - capacity + 1) \&\& ... \&\&
+             (*this)[capacity - 1] == *(last - 1)</code><br><br>
+             If the number of items to be copied from the range <code>[first, last)</code> is greater than the
+             specified <code>capacity</code> then only elements from the range <code>[last - capacity, last)</code>
+             will be copied.<br><br> The amount of allocated memory in the internal buffer is
+             <code>max[std::distance(first, last), capacity_ctrl.min_capacity()]</code>.
+        \param capacity_ctrl The new capacity controller.
+        \param first The beginning of the range to be copied.
+        \param last The end of the range to be copied.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws or nothing if <code>T::T(T&&)</code> is noexcept and 
+                <code>InputIterator</code> is a move iterator.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in <code>std::distance(first, last)</code>; in
+             <code>min[capacity_ctrl.%capacity(), std::distance(first, last)]</code> if the <code>InputIterator</code>
+             is a <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">RandomAccessIterator</a>).
+        \sa <code>\link operator=(const circular_buffer_space_optimized&) operator=\endlink</code>,
+            <code>\link assign(size_type, param_value_type) assign(size_type, const_reference)\endlink</code>,
+            <code>\link assign(capacity_type, size_type, param_value_type)
+            assign(capacity_type, size_type, const_reference)\endlink</code>,
+            <code>assign(InputIterator, InputIterator)</code>
+    */
+    template <class InputIterator>
+    void assign(capacity_type capacity_ctrl, InputIterator first, InputIterator last) {
+       m_capacity_ctrl = capacity_ctrl;
+       circular_buffer<T, Alloc>::assign(capacity_ctrl, first, last);
+    }
+
+    //! Swap the contents of two space-optimized circular-buffers.
+    /*!
+        \post <code>this</code> contains elements of <code>cb</code> and vice versa; the capacity and the amount of
+              allocated memory in the internal buffer of <code>this</code> equal to the capacity and the amount of
+              allocated memory of <code>cb</code> and vice versa.
+        \param cb The <code>circular_buffer_space_optimized</code> whose content will be swapped.
+        \throws Nothing.
+        \par Exception Safety
+             No-throw.
+        \par Iterator Invalidation
+             Invalidates all iterators of both <code>circular_buffer_space_optimized</code> containers. (On the other
+             hand the iterators still point to the same elements but within another container. If you want to rely on
+             this feature you have to turn the __debug_support off by defining macro BOOST_CB_DISABLE_DEBUG,
+             otherwise an assertion will report an error if such invalidated iterator is used.)
+        \par Complexity
+             Constant (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>swap(circular_buffer<T, Alloc>&, circular_buffer<T, Alloc>&)</code>, 
+            <code>swap(circular_buffer_space_optimized<T, Alloc>&, circular_buffer_space_optimized<T, Alloc>&)</code>
+
+
+    */
+    // Note link does not work right.  Asked on Doxygen forum for advice 23 May 2103.
+
+    void swap(circular_buffer_space_optimized<T, Alloc>& cb) BOOST_NOEXCEPT {
+        std::swap(m_capacity_ctrl, cb.m_capacity_ctrl);
+        circular_buffer<T, Alloc>::swap(cb);
+    }
+
+    //! Insert a new element at the end of the space optimized circular buffer.
+    /*!
+        \post if <code>capacity().%capacity() > 0</code> then <code>back() == item</code><br>
+              If the <code>circular_buffer_space_optimized</code> is full, the first element will be removed. If the
+              capacity is <code>0</code>, nothing will be inserted.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param item The element to be inserted.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link push_front() push_front(const_reference)\endlink</code>, <code>pop_back()</code>,
+            <code>pop_front()</code>
+    */
+    void push_back(param_value_type item) {
+        check_low_capacity();
+        circular_buffer<T, Alloc>::push_back(item);
+    }
+
+    //! Insert a new element at the end of the space optimized circular buffer.
+    /*!
+        \post if <code>capacity().%capacity() > 0</code> then <code>back() == item</code><br>
+              If the <code>circular_buffer_space_optimized</code> is full, the first element will be removed. If the
+              capacity is <code>0</code>, nothing will be inserted.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param item The element to be inserted.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link push_front() push_front(const_reference)\endlink</code>, <code>pop_back()</code>,
+            <code>pop_front()</code>
+    */
+    void push_back(rvalue_type item) {
+        check_low_capacity();
+        circular_buffer<T, Alloc>::push_back(boost::move(item));
+    }
+
+    //! Insert a new element at the end of the space optimized circular buffer.
+    /*!
+        \post if <code>capacity().%capacity() > 0</code> then <code>back() == item</code><br>
+              If the <code>circular_buffer_space_optimized</code> is full, the first element will be removed. If the
+              capacity is <code>0</code>, nothing will be inserted.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T()</code> throws. 
+                Whatever <code>T::T(const T&)</code> throws or nothing if <code>T::T(T&&)</code> is noexcept.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link push_front() push_front(const_reference)\endlink</code>, <code>pop_back()</code>,
+            <code>pop_front()</code>
+    */
+    void push_back() {
+        check_low_capacity();
+        circular_buffer<T, Alloc>::push_back();
+    }
+
+    //! Insert a new element at the beginning of the space optimized circular buffer.
+    /*!
+        \post if <code>capacity().%capacity() > 0</code> then <code>front() == item</code><br>
+              If the <code>circular_buffer_space_optimized</code> is full, the last element will be removed. If the
+              capacity is <code>0</code>, nothing will be inserted.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param item The element to be inserted.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link push_back() push_back(const_reference)\endlink</code>, <code>pop_back()</code>,
+            <code>pop_front()</code>
+    */
+    void push_front(param_value_type item) {
+        check_low_capacity();
+        circular_buffer<T, Alloc>::push_front(item);
+    }
+
+    //! Insert a new element at the beginning of the space optimized circular buffer.
+    /*!
+        \post if <code>capacity().%capacity() > 0</code> then <code>front() == item</code><br>
+              If the <code>circular_buffer_space_optimized</code> is full, the last element will be removed. If the
+              capacity is <code>0</code>, nothing will be inserted.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param item The element to be inserted.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws or nothing if <code>T::T(T&&)</code> is noexcept.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link push_back() push_back(const_reference)\endlink</code>, <code>pop_back()</code>,
+            <code>pop_front()</code>
+    */
+    void push_front(rvalue_type item) {
+        check_low_capacity();
+        circular_buffer<T, Alloc>::push_front(boost::move(item));
+    }
+
+    //! Insert a new element at the beginning of the space optimized circular buffer.
+    /*!
+        \post if <code>capacity().%capacity() > 0</code> then <code>front() == item</code><br>
+              If the <code>circular_buffer_space_optimized</code> is full, the last element will be removed. If the
+              capacity is <code>0</code>, nothing will be inserted.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T()</code> throws.
+                Whatever <code>T::T(const T&)</code> throws or nothing if <code>T::T(T&&)</code> is noexcept.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link push_back() push_back(const_reference)\endlink</code>, <code>pop_back()</code>,
+            <code>pop_front()</code>
+    */
+    void push_front() {
+        check_low_capacity();
+        circular_buffer<T, Alloc>::push_front();
+    }
+
+    //! Remove the last element from the space optimized circular buffer.
+    /*!
+        \pre <code>!empty()</code>
+        \post The last element is removed from the <code>circular_buffer_space_optimized</code>.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively decreased.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>pop_front()</code>, <code>\link push_back() push_back(const_reference)\endlink</code>,
+            <code>\link push_front() push_front(const_reference)\endlink</code>
+    */
+    void pop_back() {
+        circular_buffer<T, Alloc>::pop_back();
+        check_high_capacity();
+    }
+
+    //! Remove the first element from the space optimized circular buffer.
+    /*!
+        \pre <code>!empty()</code>
+        \post The first element is removed from the <code>circular_buffer_space_optimized</code>.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively decreased.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>pop_back()</code>, <code>\link push_back() push_back(const_reference)\endlink</code>,
+            <code>\link push_front() push_front(const_reference)\endlink</code>
+    */
+    void pop_front() {
+        circular_buffer<T, Alloc>::pop_front();
+        check_high_capacity();
+    }
+
+    //! Insert an element at the specified position.
+    /*!
+        \pre <code>pos</code> is a valid iterator pointing to the <code>circular_buffer_space_optimized</code> or its
+             end.
+        \post The <code>item</code> will be inserted at the position <code>pos</code>.<br>
+              If the <code>circular_buffer_space_optimized</code> is full, the first element will be overwritten. If
+              the <code>circular_buffer_space_optimized</code> is full and the <code>pos</code> points to
+              <code>begin()</code>, then the <code>item</code> will not be inserted. If the capacity is <code>0</code>,
+              nothing will be inserted.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param pos An iterator specifying the position where the <code>item</code> will be inserted.
+        \param item The element to be inserted.
+        \return Iterator to the inserted element or <code>begin()</code> if the <code>item</code> is not inserted. (See
+                the <i>Effect</i>.)
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+                Whatever <code>T::operator = (const T&)</code> throws.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link insert(iterator, size_type, param_value_type)
+            insert(iterator, size_type, value_type)\endlink</code>,
+            <code>insert(iterator, InputIterator, InputIterator)</code>,
+            <code>\link rinsert(iterator, param_value_type) rinsert(iterator, value_type)\endlink</code>,
+            <code>\link rinsert(iterator, size_type, param_value_type)
+            rinsert(iterator, size_type, value_type)\endlink</code>,
+            <code>rinsert(iterator, InputIterator, InputIterator)</code>
+    */
+    iterator insert(iterator pos, param_value_type item) {
+        size_type index = pos - begin();
+        check_low_capacity();
+        return circular_buffer<T, Alloc>::insert(begin() + index, item);
+    }
+
+    //! Insert an element at the specified position.
+    /*!
+        \pre <code>pos</code> is a valid iterator pointing to the <code>circular_buffer_space_optimized</code> or its
+             end.
+        \post The <code>item</code> will be inserted at the position <code>pos</code>.<br>
+              If the <code>circular_buffer_space_optimized</code> is full, the first element will be overwritten. If
+              the <code>circular_buffer_space_optimized</code> is full and the <code>pos</code> points to
+              <code>begin()</code>, then the <code>item</code> will not be inserted. If the capacity is <code>0</code>,
+              nothing will be inserted.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param pos An iterator specifying the position where the <code>item</code> will be inserted.
+        \param item The element to be inserted.
+        \return Iterator to the inserted element or <code>begin()</code> if the <code>item</code> is not inserted. (See
+                the <i>Effect</i>.)
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws or nothing if <code>T::T(T&&)</code> is noexcept.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link insert(iterator, size_type, param_value_type)
+            insert(iterator, size_type, value_type)\endlink</code>,
+            <code>insert(iterator, InputIterator, InputIterator)</code>,
+            <code>\link rinsert(iterator, param_value_type) rinsert(iterator, value_type)\endlink</code>,
+            <code>\link rinsert(iterator, size_type, param_value_type)
+            rinsert(iterator, size_type, value_type)\endlink</code>,
+            <code>rinsert(iterator, InputIterator, InputIterator)</code>
+    */
+    iterator insert(iterator pos, rvalue_type item) {
+        size_type index = pos - begin();
+        check_low_capacity();
+        return circular_buffer<T, Alloc>::insert(begin() + index, boost::move(item));
+    }
+
+    //! Insert an element at the specified position.
+    /*!
+        \pre <code>pos</code> is a valid iterator pointing to the <code>circular_buffer_space_optimized</code> or its
+             end.
+        \post The <code>item</code> will be inserted at the position <code>pos</code>.<br>
+              If the <code>circular_buffer_space_optimized</code> is full, the first element will be overwritten. If
+              the <code>circular_buffer_space_optimized</code> is full and the <code>pos</code> points to
+              <code>begin()</code>, then the <code>item</code> will not be inserted. If the capacity is <code>0</code>,
+              nothing will be inserted.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param pos An iterator specifying the position where the <code>item</code> will be inserted.
+        \return Iterator to the inserted element or <code>begin()</code> if the <code>item</code> is not inserted. (See
+                the <i>Effect</i>.)
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T()</code> throws.
+                Whatever <code>T::T(const T&)</code> throws or nothing if <code>T::T(T&&)</code> is noexcept.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link insert(iterator, size_type, param_value_type)
+            insert(iterator, size_type, value_type)\endlink</code>,
+            <code>insert(iterator, InputIterator, InputIterator)</code>,
+            <code>\link rinsert(iterator, param_value_type) rinsert(iterator, value_type)\endlink</code>,
+            <code>\link rinsert(iterator, size_type, param_value_type)
+            rinsert(iterator, size_type, value_type)\endlink</code>,
+            <code>rinsert(iterator, InputIterator, InputIterator)</code>
+    */
+    iterator insert(iterator pos) {
+        size_type index = pos - begin();
+        check_low_capacity();
+        return circular_buffer<T, Alloc>::insert(begin() + index);
+    }
+
+    //! Insert <code>n</code> copies of the <code>item</code> at the specified position.
+    /*!
+        \pre <code>pos</code> is a valid iterator pointing to the <code>circular_buffer_space_optimized</code> or its
+             end.
+        \post The number of <code>min[n, (pos - begin()) + reserve()]</code> elements will be inserted at the position
+              <code>pos</code>.<br>The number of <code>min[pos - begin(), max[0, n - reserve()]]</code> elements will
+              be overwritten at the beginning of the <code>circular_buffer_space_optimized</code>.<br>(See
+              <i>Example</i> for the explanation.)<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param pos An iterator specifying the position where the <code>item</code>s will be inserted.
+        \param n The number of <code>item</code>s the to be inserted.
+        \param item The element whose copies will be inserted.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+                Whatever <code>T::operator = (const T&)</code> throws.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in <code>min[capacity().%capacity(), size() + n]</code>).
+        \par Example
+             Consider a <code>circular_buffer_space_optimized</code> with the capacity of 6 and the size of 4. Its
+             internal buffer may look like the one below.<br><br>
+             <code>|1|2|3|4| | |</code><br>
+             <code>p ___^</code><br><br>After inserting 5 elements at the position <code>p</code>:<br><br>
+             <code>insert(p, (size_t)5, 0);</code><br><br>actually only 4 elements get inserted and elements
+             <code>1</code> and <code>2</code> are overwritten. This is due to the fact the insert operation preserves
+             the capacity. After insertion the internal buffer looks like this:<br><br><code>|0|0|0|0|3|4|</code><br>
+             <br>For comparison if the capacity would not be preserved the internal buffer would then result in
+             <code>|1|2|0|0|0|0|0|3|4|</code>.
+        \sa <code>\link insert(iterator, param_value_type) insert(iterator, value_type)\endlink</code>,
+            <code>insert(iterator, InputIterator, InputIterator)</code>,
+            <code>\link rinsert(iterator, param_value_type) rinsert(iterator, value_type)\endlink</code>,
+            <code>\link rinsert(iterator, size_type, param_value_type)
+            rinsert(iterator, size_type, value_type)\endlink</code>,
+            <code>rinsert(iterator, InputIterator, InputIterator)</code>
+    */
+    void insert(iterator pos, size_type n, param_value_type item) {
+        size_type index = pos - begin();
+        check_low_capacity(n);
+        circular_buffer<T, Alloc>::insert(begin() + index, n, item);
+    }
+
+    //! Insert the range <code>[first, last)</code> at the specified position.
+    /*!
+        \pre <code>pos</code> is a valid iterator pointing to the <code>circular_buffer_space_optimized</code> or its
+             end.<br>Valid range <code>[first, last)</code> where <code>first</code> and <code>last</code> meet the
+             requirements of an <a href="http://www.sgi.com/tech/stl/InputIterator.html">InputIterator</a>.
+        \post Elements from the range
+              <code>[first + max[0, distance(first, last) - (pos - begin()) - reserve()], last)</code> will be
+              inserted at the position <code>pos</code>.<br>The number of <code>min[pos - begin(), max[0,
+              distance(first, last) - reserve()]]</code> elements will be overwritten at the beginning of the
+              <code>circular_buffer_space_optimized</code>.<br>(See <i>Example</i> for the explanation.)<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param pos An iterator specifying the position where the range will be inserted.
+        \param first The beginning of the range to be inserted.
+        \param last The end of the range to be inserted.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws or nothing if <code>T::T(T&&)</code> is noexcept.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in <code>[size() + std::distance(first, last)]</code>; in
+             <code>min[capacity().%capacity(), size() + std::distance(first, last)]</code> if the
+             <code>InputIterator</code> is a
+             <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">RandomAccessIterator</a>).
+        \par Example
+             Consider a <code>circular_buffer_space_optimized</code> with the capacity of 6 and the size of 4. Its
+             internal buffer may look like the one below.<br><br>
+             <code>|1|2|3|4| | |</code><br>
+             <code>p ___^</code><br><br>After inserting a range of elements at the position <code>p</code>:<br><br>
+             <code>int array[] = { 5, 6, 7, 8, 9 };</code><br><code>insert(p, array, array + 5);</code><br><br>
+             actually only elements <code>6</code>, <code>7</code>, <code>8</code> and <code>9</code> from the
+             specified range get inserted and elements <code>1</code> and <code>2</code> are overwritten. This is due
+             to the fact the insert operation preserves the capacity. After insertion the internal buffer looks like
+             this:<br><br><code>|6|7|8|9|3|4|</code><br><br>For comparison if the capacity would not be preserved the
+             internal buffer would then result in <code>|1|2|5|6|7|8|9|3|4|</code>.
+        \sa <code>\link insert(iterator, param_value_type) insert(iterator, value_type)\endlink</code>,
+            <code>\link insert(iterator, size_type, param_value_type)
+            insert(iterator, size_type, value_type)\endlink</code>, <code>\link rinsert(iterator, param_value_type)
+            rinsert(iterator, value_type)\endlink</code>, <code>\link rinsert(iterator, size_type, param_value_type)
+            rinsert(iterator, size_type, value_type)\endlink</code>,
+            <code>rinsert(iterator, InputIterator, InputIterator)</code>
+    */
+    template <class InputIterator>
+    void insert(iterator pos, InputIterator first, InputIterator last) {
+        insert(pos, first, last, is_integral<InputIterator>());
+    }
+
+    //! Insert an element before the specified position.
+    /*!
+        \pre <code>pos</code> is a valid iterator pointing to the <code>circular_buffer_space_optimized</code> or its
+             end.
+        \post The <code>item</code> will be inserted before the position <code>pos</code>.<br>
+              If the <code>circular_buffer_space_optimized</code> is full, the last element will be overwritten. If the
+              <code>circular_buffer_space_optimized</code> is full and the <code>pos</code> points to
+              <code>end()</code>, then the <code>item</code> will not be inserted. If the capacity is <code>0</code>,
+              nothing will be inserted.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param pos An iterator specifying the position before which the <code>item</code> will be inserted.
+        \param item The element to be inserted.
+        \return Iterator to the inserted element or <code>end()</code> if the <code>item</code> is not inserted. (See
+                the <i>Effect</i>.)
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+                Whatever <code>T::operator = (const T&)</code> throws.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link rinsert(iterator, size_type, param_value_type)
+            rinsert(iterator, size_type, value_type)\endlink</code>,
+            <code>rinsert(iterator, InputIterator, InputIterator)</code>,
+            <code>\link insert(iterator, param_value_type) insert(iterator, value_type)\endlink</code>,
+            <code>\link insert(iterator, size_type, param_value_type)
+            insert(iterator, size_type, value_type)\endlink</code>,
+            <code>insert(iterator, InputIterator, InputIterator)</code>
+    */
+    iterator rinsert(iterator pos, param_value_type item) {
+        size_type index = pos - begin();
+        check_low_capacity();
+        return circular_buffer<T, Alloc>::rinsert(begin() + index, item);
+    }
+
+    //! Insert an element before the specified position.
+    /*!
+        \pre <code>pos</code> is a valid iterator pointing to the <code>circular_buffer_space_optimized</code> or its
+             end.
+        \post The <code>item</code> will be inserted before the position <code>pos</code>.<br>
+              If the <code>circular_buffer_space_optimized</code> is full, the last element will be overwritten. If the
+              <code>circular_buffer_space_optimized</code> is full and the <code>pos</code> points to
+              <code>end()</code>, then the <code>item</code> will not be inserted. If the capacity is <code>0</code>,
+              nothing will be inserted.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param pos An iterator specifying the position before which the <code>item</code> will be inserted.
+        \param item The element to be inserted.
+        \return Iterator to the inserted element or <code>end()</code> if the <code>item</code> is not inserted. (See
+                the <i>Effect</i>.)
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws or nothing if <code>T::T(T&&)</code> is noexcept.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link rinsert(iterator, size_type, param_value_type)
+            rinsert(iterator, size_type, value_type)\endlink</code>,
+            <code>rinsert(iterator, InputIterator, InputIterator)</code>,
+            <code>\link insert(iterator, param_value_type) insert(iterator, value_type)\endlink</code>,
+            <code>\link insert(iterator, size_type, param_value_type)
+            insert(iterator, size_type, value_type)\endlink</code>,
+            <code>insert(iterator, InputIterator, InputIterator)</code>
+    */
+    iterator rinsert(iterator pos, rvalue_type item) {
+        size_type index = pos - begin();
+        check_low_capacity();
+        return circular_buffer<T, Alloc>::rinsert(begin() + index, boost::move(item));
+    }
+
+    //! Insert an element before the specified position.
+    /*!
+        \pre <code>pos</code> is a valid iterator pointing to the <code>circular_buffer_space_optimized</code> or its
+             end.
+        \post The <code>item</code> will be inserted before the position <code>pos</code>.<br>
+              If the <code>circular_buffer_space_optimized</code> is full, the last element will be overwritten. If the
+              <code>circular_buffer_space_optimized</code> is full and the <code>pos</code> points to
+              <code>end()</code>, then the <code>item</code> will not be inserted. If the capacity is <code>0</code>,
+              nothing will be inserted.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param pos An iterator specifying the position before which the <code>item</code> will be inserted.
+        \return Iterator to the inserted element or <code>end()</code> if the <code>item</code> is not inserted. (See
+                the <i>Effect</i>.)
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T()</code> throws.
+                Whatever <code>T::T(const T&)</code> throws or nothing if <code>T::T(T&&)</code> is noexcept.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>\link rinsert(iterator, size_type, param_value_type)
+            rinsert(iterator, size_type, value_type)\endlink</code>,
+            <code>rinsert(iterator, InputIterator, InputIterator)</code>,
+            <code>\link insert(iterator, param_value_type) insert(iterator, value_type)\endlink</code>,
+            <code>\link insert(iterator, size_type, param_value_type)
+            insert(iterator, size_type, value_type)\endlink</code>,
+            <code>insert(iterator, InputIterator, InputIterator)</code>
+    */
+    iterator rinsert(iterator pos) {
+        size_type index = pos - begin();
+        check_low_capacity();
+        return circular_buffer<T, Alloc>::rinsert(begin() + index);
+    }
+
+    //! Insert <code>n</code> copies of the <code>item</code> before the specified position.
+    /*!
+        \pre <code>pos</code> is a valid iterator pointing to the <code>circular_buffer_space_optimized</code> or its
+             end.
+        \post The number of <code>min[n, (end() - pos) + reserve()]</code> elements will be inserted before the
+              position <code>pos</code>.<br>The number of <code>min[end() - pos, max[0, n - reserve()]]</code> elements
+              will be overwritten at the end of the <code>circular_buffer_space_optimized</code>.<br>(See
+              <i>Example</i> for the explanation.)<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param pos An iterator specifying the position where the <code>item</code>s will be inserted.
+        \param n The number of <code>item</code>s the to be inserted.
+        \param item The element whose copies will be inserted.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+                Whatever <code>T::operator = (const T&)</code> throws.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in <code>min[capacity().%capacity(), size() + n]</code>).
+        \par Example
+             Consider a <code>circular_buffer_space_optimized</code> with the capacity of 6 and the size of 4. Its
+             internal buffer may look like the one below.<br><br>
+             <code>|1|2|3|4| | |</code><br>
+             <code>p ___^</code><br><br>After inserting 5 elements before the position <code>p</code>:<br><br>
+             <code>rinsert(p, (size_t)5, 0);</code><br><br>actually only 4 elements get inserted and elements
+             <code>3</code> and <code>4</code> are overwritten. This is due to the fact the rinsert operation preserves
+             the capacity. After insertion the internal buffer looks like this:<br><br><code>|1|2|0|0|0|0|</code><br>
+             <br>For comparison if the capacity would not be preserved the internal buffer would then result in
+             <code>|1|2|0|0|0|0|0|3|4|</code>.
+        \sa <code>\link rinsert(iterator, param_value_type) rinsert(iterator, value_type)\endlink</code>,
+            <code>rinsert(iterator, InputIterator, InputIterator)</code>,
+            <code>\link insert(iterator, param_value_type) insert(iterator, value_type)\endlink</code>,
+            <code>\link insert(iterator, size_type, param_value_type)
+            insert(iterator, size_type, value_type)\endlink</code>,
+            <code>insert(iterator, InputIterator, InputIterator)</code>
+    */
+    void rinsert(iterator pos, size_type n, param_value_type item) {
+        size_type index = pos - begin();
+        check_low_capacity(n);
+        circular_buffer<T, Alloc>::rinsert(begin() + index, n, item);
+    }
+
+        //! Insert the range <code>[first, last)</code> before the specified position.
+    /*!
+        \pre <code>pos</code> is a valid iterator pointing to the <code>circular_buffer_space_optimized</code> or its
+             end.<br>
+             Valid range <code>[first, last)</code> where <code>first</code> and <code>last</code> meet the
+             requirements of an <a href="http://www.sgi.com/tech/stl/InputIterator.html">InputIterator</a>.
+        \post Elements from the range
+              <code>[first, last - max[0, distance(first, last) - (end() - pos) - reserve()])</code> will be inserted
+              before the position <code>pos</code>.<br>The number of <code>min[end() - pos, max[0,
+              distance(first, last) - reserve()]]</code> elements will be overwritten at the end of the
+              <code>circular_buffer</code>.<br>(See <i>Example</i> for the explanation.)<br><br>
+              The amount of allocated memory in the internal buffer may be predictively increased.
+        \param pos An iterator specifying the position where the range will be inserted.
+        \param first The beginning of the range to be inserted.
+        \param last The end of the range to be inserted.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::T(const T&)</code> throws.
+                Whatever <code>T::operator = (const T&)</code> throws.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in <code>[size() + std::distance(first, last)]</code>; in
+             <code>min[capacity().%capacity(), size() + std::distance(first, last)]</code> if the
+             <code>InputIterator</code> is a
+             <a href="http://www.sgi.com/tech/stl/RandomAccessIterator.html">RandomAccessIterator</a>).
+        \par Example
+             Consider a <code>circular_buffer_space_optimized</code> with the capacity of 6 and the size of 4. Its
+             internal buffer may look like the one below.<br><br>
+             <code>|1|2|3|4| | |</code><br>
+             <code>p ___^</code><br><br>After inserting a range of elements before the position <code>p</code>:<br><br>
+             <code>int array[] = { 5, 6, 7, 8, 9 };</code><br><code>insert(p, array, array + 5);</code><br><br>
+             actually only elements <code>5</code>, <code>6</code>, <code>7</code> and <code>8</code> from the
+             specified range get inserted and elements <code>3</code> and <code>4</code> are overwritten. This is due
+             to the fact the rinsert operation preserves the capacity. After insertion the internal buffer looks like
+             this:<br><br><code>|1|2|5|6|7|8|</code><br><br>For comparison if the capacity would not be preserved the
+             internal buffer would then result in <code>|1|2|5|6|7|8|9|3|4|</code>.
+        \sa <code>\link rinsert(iterator, param_value_type) rinsert(iterator, value_type)\endlink</code>,
+            <code>\link rinsert(iterator, size_type, param_value_type)
+            rinsert(iterator, size_type, value_type)\endlink</code>, <code>\link insert(iterator, param_value_type)
+            insert(iterator, value_type)\endlink</code>, <code>\link insert(iterator, size_type, param_value_type)
+            insert(iterator, size_type, value_type)\endlink</code>,
+            <code>insert(iterator, InputIterator, InputIterator)</code>
+    */
+    template <class InputIterator>
+    void rinsert(iterator pos, InputIterator first, InputIterator last) {
+        rinsert(pos, first, last, is_integral<InputIterator>());
+    }
+
+    //! Remove an element at the specified position.
+    /*!
+        \pre <code>pos</code> is a valid iterator pointing to the <code>circular_buffer_space_optimized</code> (but not
+             an <code>end()</code>).
+        \post The element at the position <code>pos</code> is removed.<br><br>
+              The amount of allocated memory in the internal buffer may be predictively decreased.
+        \param pos An iterator pointing at the element to be removed.
+        \return Iterator to the first element remaining beyond the removed element or <code>end()</code> if no such
+                element exists.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::operator = (const T&)</code> throws or 
+                nothing if <code>T::operator = (T&&)</code> is noexcept.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>erase(iterator, iterator)</code>, <code>rerase(iterator)</code>,
+            <code>rerase(iterator, iterator)</code>, <code>clear()</code>
+    */
+    iterator erase(iterator pos) {
+        iterator it = circular_buffer<T, Alloc>::erase(pos);
+        size_type index = it - begin();
+        check_high_capacity();
+        return begin() + index;
+    }
+
+    //! Erase the range <code>[first, last)</code>.
+    /*!
+        \pre Valid range <code>[first, last)</code>.
+        \post The elements from the range <code>[first, last)</code> are removed. (If <code>first == last</code>
+              nothing is removed.)<br><br>
+              The amount of allocated memory in the internal buffer may be predictively decreased.
+        \param first The beginning of the range to be removed.
+        \param last The end of the range to be removed.
+        \return Iterator to the first element remaining beyond the removed elements or <code>end()</code> if no such
+                element exists.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::operator = (const T&)</code> throws or 
+                nothing if <code>T::operator = (T&&)</code> is noexcept.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>erase(iterator)</code>, <code>rerase(iterator)</code>, <code>rerase(iterator, iterator)</code>,
+            <code>clear()</code>
+    */
+    iterator erase(iterator first, iterator last) {
+        iterator it = circular_buffer<T, Alloc>::erase(first, last);
+        size_type index = it - begin();
+        check_high_capacity();
+        return begin() + index;
+    }
+
+    //! Remove an element at the specified position.
+    /*!
+        \pre <code>pos</code> is a valid iterator pointing to the <code>circular_buffer_space_optimized</code> (but not
+             an <code>end()</code>).<br><br>
+              The amount of allocated memory in the internal buffer may be predictively decreased.
+        \post The element at the position <code>pos</code> is removed.
+        \param pos An iterator pointing at the element to be removed.
+        \return Iterator to the first element remaining in front of the removed element or <code>begin()</code> if no
+                such element exists.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::operator = (const T&)</code> throws or 
+                nothing if <code>T::operator = (T&&)</code> is noexcept.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \note Basically there is no difference between <code>erase(iterator)</code> and this method. It is implemented
+              only for consistency with the base <code>circular_buffer</code>.
+        \sa <code>erase(iterator)</code>, <code>erase(iterator, iterator)</code>,
+            <code>rerase(iterator, iterator)</code>, <code>clear()</code>
+    */
+    iterator rerase(iterator pos) {
+        iterator it = circular_buffer<T, Alloc>::rerase(pos);
+        size_type index = it - begin();
+        check_high_capacity();
+        return begin() + index;
+    }
+
+    //! Erase the range <code>[first, last)</code>.
+    /*!
+        \pre Valid range <code>[first, last)</code>.
+        \post The elements from the range <code>[first, last)</code> are removed. (If <code>first == last</code>
+              nothing is removed.)<br><br>
+              The amount of allocated memory in the internal buffer may be predictively decreased.
+        \param first The beginning of the range to be removed.
+        \param last The end of the range to be removed.
+        \return Iterator to the first element remaining in front of the removed elements or <code>begin()</code> if no
+                such element exists.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+                Whatever <code>T::operator = (const T&)</code> throws or 
+                nothing if <code>T::operator = (T&&)</code> is noexcept.
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \note Basically there is no difference between <code>erase(iterator, iterator)</code> and this method. It is
+              implemented only for consistency with the base
+              <code><circular_buffer</code>.
+        \sa <code>erase(iterator)</code>, <code>erase(iterator, iterator)</code>, <code>rerase(iterator)</code>,
+            <code>clear()</code>
+    */
+    iterator rerase(iterator first, iterator last) {
+        iterator it = circular_buffer<T, Alloc>::rerase(first, last);
+        size_type index = it - begin();
+        check_high_capacity();
+        return begin() + index;
+    }
+
+    //! Remove all stored elements from the space optimized circular buffer.
+    /*!
+        \post <code>size() == 0</code><br><br>
+              The amount of allocated memory in the internal buffer may be predictively decreased.
+        \throws "An allocation error" if memory is exhausted (<code>std::bad_alloc</code> if the standard allocator is
+                used).
+        \par Exception Safety
+             Basic.
+        \par Iterator Invalidation
+             Invalidates all iterators pointing to the <code>circular_buffer_space_optimized</code> (except iterators
+             equal to <code>end()</code>).
+        \par Complexity
+             Linear (in the size of the <code>circular_buffer_space_optimized</code>).
+        \sa <code>~circular_buffer_space_optimized()</code>, <code>erase(iterator)</code>,
+            <code>erase(iterator, iterator)</code>, <code>rerase(iterator)</code>,
+            <code>rerase(iterator, iterator)</code>
+    */
+    void clear() { erase(begin(), end()); }
+
+private:
+// Helper methods
+
+    //! Adjust the amount of allocated memory.
+    void adjust_min_capacity() {
+        if (m_capacity_ctrl.min_capacity() > circular_buffer<T, Alloc>::capacity())
+            circular_buffer<T, Alloc>::set_capacity(m_capacity_ctrl.min_capacity());
+        else
+            check_high_capacity();
+    }
+
+    //! Ensure the reserve for possible growth up.
+    size_type ensure_reserve(size_type new_capacity, size_type buffer_size) const {
+        if (buffer_size + new_capacity / 5 >= new_capacity)
+            new_capacity *= 2; // ensure at least 20% reserve
+        if (new_capacity > m_capacity_ctrl)
+            return m_capacity_ctrl;
+        return new_capacity;
+    }
+
+    //! Check for low capacity.
+    /*
+        \post If the capacity is low it will be increased.
+    */
+    void check_low_capacity(size_type n = 1) {
+        size_type new_size = size() + n;
+        size_type new_capacity = circular_buffer<T, Alloc>::capacity();
+        if (new_size > new_capacity) {
+            if (new_capacity == 0)
+                new_capacity = 1;
+            for (; new_size > new_capacity; new_capacity *= 2) {}
+            circular_buffer<T, Alloc>::set_capacity(
+                ensure_reserve(new_capacity, new_size));
+        }
+#if BOOST_CB_ENABLE_DEBUG
+        this->invalidate_iterators_except(end());
+#endif
+    }
+
+    //! Check for high capacity.
+    /*
+        \post If the capacity is high it will be decreased.
+    */
+    void check_high_capacity() {
+        size_type new_capacity = circular_buffer<T, Alloc>::capacity();
+        while (new_capacity / 3 >= size()) { // (new_capacity / 3) -> avoid oscillations
+            new_capacity /= 2;
+            if (new_capacity <= m_capacity_ctrl.min_capacity()) {
+                new_capacity = m_capacity_ctrl.min_capacity();
+                break;
+            }
+        }
+        circular_buffer<T, Alloc>::set_capacity(
+            ensure_reserve(new_capacity, size()));
+#if BOOST_CB_ENABLE_DEBUG
+        this->invalidate_iterators_except(end());
+#endif
+    }
+
+    //! Specialized method for reducing the capacity.
+    void reduce_capacity(const true_type&) {
+        circular_buffer<T, Alloc>::set_capacity((std::max)(m_capacity_ctrl.min_capacity(), size()));
+    }
+
+    //! Specialized method for reducing the capacity.
+    void reduce_capacity(const false_type&) {}
+
+    //! Determine the initial capacity.
+    static size_type init_capacity(const capacity_type& capacity_ctrl, size_type n) {
+        BOOST_CB_ASSERT(capacity_ctrl.capacity() >= n); // check for capacity lower than n
+        return (std::max)(capacity_ctrl.min_capacity(), n);
+    }
+
+    //! Specialized method for determining the initial capacity.
+    template <class IntegralType>
+    static size_type init_capacity(const capacity_type& capacity_ctrl, IntegralType n, IntegralType,
+        const true_type&) {
+        return init_capacity(capacity_ctrl, static_cast<size_type>(n));
+    }
+
+    //! Specialized method for determining the initial capacity.
+    template <class Iterator>
+    static size_type init_capacity(const capacity_type& capacity_ctrl, Iterator first, Iterator last,
+        const false_type&) {
+        BOOST_CB_IS_CONVERTIBLE(Iterator, value_type); // check for invalid iterator type
+#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x581))
+        return init_capacity(capacity_ctrl, first, last, BOOST_ITERATOR_CATEGORY<Iterator>::type());
+#else
+        return init_capacity(
+            capacity_ctrl, first, last, BOOST_DEDUCED_TYPENAME BOOST_ITERATOR_CATEGORY<Iterator>::type());
+#endif
+    }
+
+    //! Specialized method for determining the initial capacity.
+    template <class InputIterator>
+    static size_type init_capacity(const capacity_type& capacity_ctrl, InputIterator, InputIterator,
+        const std::input_iterator_tag&) {
+        return capacity_ctrl.capacity();
+    }
+
+    //! Specialized method for determining the initial capacity.
+    template <class ForwardIterator>
+    static size_type init_capacity(const capacity_type& capacity_ctrl, ForwardIterator first, ForwardIterator last,
+        const std::forward_iterator_tag&) {
+        BOOST_CB_ASSERT(std::distance(first, last) >= 0); // check for wrong range
+        return (std::max)(capacity_ctrl.min_capacity(),
+            (std::min)(capacity_ctrl.capacity(), static_cast<size_type>(std::distance(first, last))));
+    }
+
+    //! Specialized insert method.
+    template <class IntegralType>
+    void insert(const iterator& pos, IntegralType n, IntegralType item, const true_type&) {
+        insert(pos, static_cast<size_type>(n), static_cast<value_type>(item));
+    }
+
+    //! Specialized insert method.
+    template <class Iterator>
+    void insert(const iterator& pos, Iterator first, Iterator last, const false_type&) {
+        size_type index = pos - begin();
+        check_low_capacity(std::distance(first, last));
+        circular_buffer<T, Alloc>::insert(begin() + index, first, last);
+    }
+
+    //! Specialized rinsert method.
+    template <class IntegralType>
+    void rinsert(const iterator& pos, IntegralType n, IntegralType item, const true_type&) {
+        rinsert(pos, static_cast<size_type>(n), static_cast<value_type>(item));
+    }
+
+    //! Specialized rinsert method.
+    template <class Iterator>
+    void rinsert(const iterator& pos, Iterator first, Iterator last, const false_type&) {
+        size_type index = pos - begin();
+        check_low_capacity(std::distance(first, last));
+        circular_buffer<T, Alloc>::rinsert(begin() + index, first, last);
+    }
+};
+
+// Non-member functions
+
+//! Test two space optimized circular buffers for equality.
+template <class T, class Alloc>
+inline bool operator == (const circular_buffer_space_optimized<T, Alloc>& lhs,
+    const circular_buffer_space_optimized<T, Alloc>& rhs) {
+    return lhs.size() == rhs.size() &&
+        std::equal(lhs.begin(), lhs.end(), rhs.begin());
+}
+
+//! Lexicographical comparison.
+template <class T, class Alloc>
+inline bool operator < (const circular_buffer_space_optimized<T, Alloc>& lhs,
+    const circular_buffer_space_optimized<T, Alloc>& rhs) {
+    return std::lexicographical_compare(
+        lhs.begin(), lhs.end(), rhs.begin(), rhs.end());
+}
+
+#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING) || BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1310))
+
+//! Test two space optimized circular buffers for non-equality.
+template <class T, class Alloc>
+inline bool operator != (const circular_buffer_space_optimized<T, Alloc>& lhs,
+    const circular_buffer_space_optimized<T, Alloc>& rhs) {
+    return !(lhs == rhs);
+}
+
+//! Lexicographical comparison.
+template <class T, class Alloc>
+inline bool operator > (const circular_buffer_space_optimized<T, Alloc>& lhs,
+    const circular_buffer_space_optimized<T, Alloc>& rhs) {
+    return rhs < lhs;
+}
+
+//! Lexicographical comparison.
+template <class T, class Alloc>
+inline bool operator <= (const circular_buffer_space_optimized<T, Alloc>& lhs,
+    const circular_buffer_space_optimized<T, Alloc>& rhs) {
+    return !(rhs < lhs);
+}
+
+//! Lexicographical comparison.
+template <class T, class Alloc>
+inline bool operator >= (const circular_buffer_space_optimized<T, Alloc>& lhs,
+    const circular_buffer_space_optimized<T, Alloc>& rhs) {
+    return !(lhs < rhs);
+}
+
+//! Swap the contents of two space optimized circular buffers.
+template <class T, class Alloc>
+inline void swap(circular_buffer_space_optimized<T, Alloc>& lhs,
+    circular_buffer_space_optimized<T, Alloc>& rhs) BOOST_NOEXCEPT {
+    lhs.swap(rhs);
+}
+
+#endif // #if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING) || BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1310))
+
+} // namespace boost
+
+#endif // #if !defined(BOOST_CIRCULAR_BUFFER_SPACE_OPTIMIZED_HPP)