indirect_vector.h

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/******************************************************************************
The MIT License(MIT)
 
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
 
Copyright(c) 2019 John Wellbelove
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files(the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions :
 
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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******************************************************************************/
 
#ifndef ETL_INDIRECT_VECTOR_INCLUDED
#define ETL_INDIRECT_VECTOR_INCLUDED
 
#include "platform.h"
#include "vector.h"
#include "pool.h"
#include "iterator.h"
#include "utility.h"
#include "functional.h"
#include "static_assert.h"
#include "initializer_list.h"
 
//*****************************************************************************
//*****************************************************************************
 
namespace etl
{
  //***************************************************************************
  //***************************************************************************
  class indirect_vector_buffer_missmatch : public vector_exception
  {
  public:
 
    indirect_vector_buffer_missmatch(string_type file_name_, numeric_type line_number_)
      : vector_exception(ETL_ERROR_TEXT("indirect_vector:buffer_missmatch", ETL_INDIRECT_VECTOR_FILE_ID"A"), file_name_, line_number_)
    {
    }
  };
 
  //***************************************************************************
  //***************************************************************************
  template <typename T>
  class iindirect_vector
  {
  public:
 
    typedef T              value_type;
    typedef T&             reference;
    typedef const T&       const_reference;
#if ETL_USING_CPP11
    typedef T&&            rvalue_reference;
#endif
    typedef T*             pointer;
    typedef const T*       const_pointer;
 
    typedef typename etl::ivector<T*>::iterator        indirect_iterator;
    typedef typename etl::ivector<T*>::const_iterator  indirect_const_iterator;
 
    typedef typename etl::ivector<T*>::size_type       size_type;
    typedef typename etl::ivector<T*>::difference_type difference_type;
 
    //*************************************************************************
    //*************************************************************************
    template <typename TUnaryFunction, typename TReturnType = void>
    class unary_function_adaptor
    {
    public:
 
      unary_function_adaptor(TUnaryFunction unary_function_)
        : unary_function(unary_function_)
      {
      }
 
      TReturnType operator()(const_pointer indirect_itr)
      {
        return unary_function(*indirect_itr);
      }
 
      TUnaryFunction unary_function;
    };
 
    //*************************************************************************
    template <typename TUnaryFunction>
    class unary_function_adaptor<TUnaryFunction, void>
    {
    public:
 
      unary_function_adaptor(TUnaryFunction unary_function_)
        : unary_function(unary_function_)
      {
      }
 
      void operator()(const_pointer indirect_itr)
      {
        unary_function(*indirect_itr);
      }
 
      TUnaryFunction unary_function;
    };
 
    //*************************************************************************
    //*************************************************************************
    template <typename TBinaryFunction, typename TReturnType = void>
    class binary_function_adaptor
    {
    public:
 
      binary_function_adaptor(TBinaryFunction binary_function_)
        : binary_function(binary_function_)
      {
      }
 
      TReturnType operator()(const_pointer indirect_itr_lhs,
                             const_pointer indirect_itr_rhs)
      {
        return binary_function(*indirect_itr_lhs, *indirect_itr_rhs);
      }
 
      TBinaryFunction binary_function;
    };
 
    //*************************************************************************
    template <typename TBinaryFunction>
    class binary_function_adaptor<TBinaryFunction, void>
    {
    public:
 
      binary_function_adaptor(TBinaryFunction binary_function_)
        : binary_function(binary_function_)
      {
      }
 
      void operator()(const_pointer indirect_itr_lhs,
                      const_pointer indirect_itr_rhs)
      {
        binary_function(*indirect_itr_lhs, *indirect_itr_rhs);
      }
 
      TBinaryFunction binary_function;
    };
 
    //*************************************************************************
    //*************************************************************************
    class iterator : public etl::iterator<ETL_OR_STD::random_access_iterator_tag, T>
    {
    public:
 
      friend class iindirect_vector;
      friend class const_iterator;
 
      iterator()
      {
      }
 
      iterator(const iterator& other)
        : lookup_itr(other.lookup_itr)
      {
      }
 
      iterator& operator ++()
      {
        ++lookup_itr;
        return *this;
      }
 
      iterator operator ++(int)
      {
        iterator temp(*this);
        ++lookup_itr;
        return temp;
      }
 
      iterator& operator --()
      {
        --lookup_itr;
        return *this;
      }
 
      iterator operator --(int)
      {
        iterator temp(*this);
        --lookup_itr;
        return temp;
      }
 
      iterator& operator =(const iterator& other)
      {
        lookup_itr = other.lookup_itr;
        return *this;
      }
 
      iterator operator +=(size_type n)
      {
        lookup_itr += n;
        return *this;
      }
 
      iterator operator -=(size_type n)
      {
        lookup_itr -= n;
        return *this;
      }
 
      reference operator *() const
      {
        return **lookup_itr;
      }
 
      pointer operator &() const
      {
        return &(**lookup_itr);
      }
 
      pointer operator ->() const
      {
        return &(**lookup_itr);
      }
 
      friend iterator operator +(const iterator& lhs, difference_type offset)
      {
        iterator result(lhs);
        result += offset;
        return result;
      }
 
      friend iterator operator -(const iterator& lhs, difference_type offset)
      {
        iterator result(lhs);
        result -= offset;
        return result;
      }
 
      indirect_iterator indirection()
      {
        return lookup_itr;
      }
 
      indirect_const_iterator indirection() const
      {
        return lookup_itr;
      }
 
      friend difference_type operator -(const iterator& lhs, const iterator& rhs)
      {
        return lhs.lookup_itr - rhs.lookup_itr;
      }
 
      friend bool operator == (const iterator& lhs, const iterator& rhs)
      {
        return lhs.lookup_itr == rhs.lookup_itr;
      }
 
      friend bool operator != (const iterator& lhs, const iterator& rhs)
      {
        return !(lhs == rhs);
      }
 
      friend bool operator < (const iterator& lhs, const iterator& rhs)
      {
        return lhs.lookup_itr < rhs.lookup_itr;
      }
 
    private:
 
      iterator(indirect_iterator itr_)
        : lookup_itr(itr_)
      {
      }
 
      indirect_iterator lookup_itr;
    };
 
    //*************************************************************************
    //*************************************************************************
    class const_iterator : public etl::iterator<ETL_OR_STD::random_access_iterator_tag, const T>
    {
    public:
 
      friend class iindirect_vector;
 
      const_iterator()
      {
      }
 
      const_iterator(const const_iterator& other)
        : lookup_itr(other.lookup_itr)
      {
      }
 
      const_iterator(const typename iindirect_vector::iterator& other)
        : lookup_itr(other.lookup_itr)
      {
      }
 
      const_iterator& operator ++()
      {
        ++lookup_itr;
        return *this;
      }
 
      const_iterator operator ++(int)
      {
        const_iterator temp(*this);
        ++lookup_itr;
        return temp;
      }
 
      const_iterator& operator --()
      {
        --lookup_itr;
        return *this;
      }
 
      const_iterator operator --(int)
      {
        const_iterator temp(*this);
        --lookup_itr;
        return temp;
      }
 
      const_iterator operator +=(size_type n)
      {
        lookup_itr += n;
        return *this;
      }
 
      const_iterator operator -=(size_type n)
      {
        lookup_itr -= n;
        return *this;
      }
 
      const_iterator& operator =(const const_iterator& other)
      {
        lookup_itr = other.lookup_itr;
        return *this;
      }
 
      const_reference operator *() const
      {
        return **lookup_itr;
      }
 
      const_pointer operator &() const
      {
        return &(**lookup_itr);
      }
 
      const_pointer operator ->() const
      {
        return &(**lookup_itr);
      }
 
      indirect_const_iterator indirection() const
      {
        return lookup_itr;
      }
 
      friend const_iterator operator +(const const_iterator& lhs, difference_type offset)
      {
        const_iterator result(lhs);
        result += offset;
        return result;
      }
 
      friend const_iterator operator -(const const_iterator& lhs, difference_type offset)
      {
        const_iterator result(lhs);
        result -= offset;
        return result;
      }
 
      friend difference_type operator -(const const_iterator& lhs, const const_iterator& rhs)
      {
        return lhs.lookup_itr - rhs.lookup_itr;
      }
 
      friend bool operator == (const const_iterator& lhs, const const_iterator& rhs)
      {
        return lhs.lookup_itr == rhs.lookup_itr;
      }
 
      friend bool operator != (const const_iterator& lhs, const const_iterator& rhs)
      {
        return !(lhs == rhs);
      }
 
      friend bool operator < (const const_iterator& lhs, const const_iterator& rhs)
      {
        return lhs.lookup_itr < rhs.lookup_itr;
      }
 
    private:
 
      typedef typename etl::ivector<T*>::const_iterator lookup_itr_t;
 
      const_iterator(indirect_const_iterator itr_)
        : lookup_itr(itr_)
      {
      }
 
      indirect_const_iterator lookup_itr;
    };
 
    typedef ETL_OR_STD::reverse_iterator<iterator>       reverse_iterator;
    typedef ETL_OR_STD::reverse_iterator<const_iterator> const_reverse_iterator;
 
  protected:
 
    typedef typename etl::parameter_type<T>::type parameter_t;
 
  public:
 
    //*********************************************************************
    //*********************************************************************
    iterator begin()
    {
      return iterator(lookup.begin());
    }
 
    //*********************************************************************
    //*********************************************************************
    const_iterator begin() const
    {
      return const_iterator(lookup.begin());
    }
 
    //*********************************************************************
    //*********************************************************************
    iterator end()
    {
      return iterator(lookup.end());
    }
 
    //*********************************************************************
    //*********************************************************************
    const_iterator end() const
    {
      return const_iterator(lookup.end());
    }
 
    //*********************************************************************
    //*********************************************************************
    const_iterator cbegin() const
    {
      return const_iterator(lookup.begin());
    }
 
    //*********************************************************************
    //*********************************************************************
    const_iterator cend() const
    {
      return const_iterator(lookup.cend());
    }
 
    //*********************************************************************
    //*********************************************************************
    reverse_iterator rbegin()
    {
      return reverse_iterator(end());
    }
 
    //*********************************************************************
    //*********************************************************************
    const_reverse_iterator rbegin() const
    {
      return const_reverse_iterator(end());
    }
 
    //*********************************************************************
    //*********************************************************************
    reverse_iterator rend()
    {
      return reverse_iterator(begin());
    }
 
    //*********************************************************************
    //*********************************************************************
    const_reverse_iterator rend() const
    {
      return const_reverse_iterator(begin());
    }
 
    //*********************************************************************
    //*********************************************************************
    const_reverse_iterator crbegin() const
    {
      return const_reverse_iterator(cend());
    }
 
    //*********************************************************************
    //*********************************************************************
    const_reverse_iterator crend() const
    {
      return const_reverse_iterator(cbegin());
    }
 
    //*********************************************************************
    //*********************************************************************
    void resize(size_t new_size)
    {
      resize(new_size, T());
    }
 
    //*********************************************************************
    //*********************************************************************
    void resize(size_t new_size, const_reference value)
    {
      ETL_ASSERT(new_size <= capacity(), ETL_ERROR(vector_full));
 
      if (new_size <= capacity())
      {
        if (new_size > size())
        {
          size_type n = new_size - size();
 
          while (n-- != 0U)
          {
            T* p = storage.create<T>(value);
            lookup.push_back(p);
          }
        }
        else
        {
          size_type n = size() - new_size;
 
          while (n-- != 0U)
          {
            pop_back();
          }
        }
      }
    }
 
    //*********************************************************************
    //*********************************************************************
    void reserve(size_t)
    {
    }
 
    //*********************************************************************
    //*********************************************************************
    reference operator [](size_t i)
    {
      return *lookup[i];
    }
 
    //*********************************************************************
    //*********************************************************************
    const_reference operator [](size_t i) const
    {
      return *lookup[i];
    }
 
    //*********************************************************************
    //*********************************************************************
    reference at(size_t i)
    {
      return *lookup.at(i);
    }
 
    //*********************************************************************
    //*********************************************************************
    const_reference at(size_t i) const
    {
      return *lookup.at(i);
    }
 
    //*********************************************************************
    //*********************************************************************
    reference front()
    {
      return *(lookup.front());
    }
 
    //*********************************************************************
    //*********************************************************************
    const_reference front() const
    {
      return *(lookup.front());
    }
 
    //*********************************************************************
    //*********************************************************************
    reference back()
    {
      return *(lookup.back());
    }
 
    //*********************************************************************
    //*********************************************************************
    const_reference back() const
    {
      return *(lookup.back());
    }
 
    //*********************************************************************
    //*********************************************************************
    template <typename TIterator>
    void assign(TIterator first, TIterator last)
    {
      ETL_STATIC_ASSERT((etl::is_same<typename etl::remove_cv<T>::type, typename etl::remove_cv<typename etl::iterator_traits<TIterator>::value_type>::type>::value), "Iterator type does not match container type");
 
#if ETL_IS_DEBUG_BUILD
      difference_type d = etl::distance(first, last);
      ETL_ASSERT(static_cast<size_t>(d) <= capacity(), ETL_ERROR(vector_full));
#endif
 
      initialise();
 
      while (first != last)
      {
        T* p = storage.create<T>(*first);
        lookup.push_back(p);
        ++first;
      }
    }
 
    //*********************************************************************
    //*********************************************************************
    void assign(size_t n, parameter_t value)
    {
      ETL_ASSERT(n <= capacity(), ETL_ERROR(vector_full));
 
      initialise();
 
      while (n-- != 0U)
      {
        T* p = storage.create<T>(value);
        lookup.push_back(p);
      }
    }
 
    //*************************************************************************
    //*************************************************************************
    void clear()
    {
      initialise();
    }
 
    //*************************************************************************
    //*************************************************************************
    void fill(const T& value)
    {
      etl::fill(begin(), end(), value);
    }
 
    //*********************************************************************
    //*********************************************************************
    void push_back(const_reference value)
    {
#if defined(ETL_CHECK_PUSH_POP)
      ETL_ASSERT(size() != capacity(), ETL_ERROR(vector_full));
#endif
      T* p = storage.create<T>(value);
      lookup.push_back(p);
    }
 
#if ETL_USING_CPP11
    //*********************************************************************
    //*********************************************************************
    void push_back(rvalue_reference value)
    {
#if defined(ETL_CHECK_PUSH_POP)
      ETL_ASSERT(size() != capacity(), ETL_ERROR(vector_full));
#endif
      T* p = storage.create<T>(etl::move(value));
      lookup.push_back(p);
    }
#endif
 
#if ETL_USING_CPP11 && ETL_NOT_USING_STLPORT && !defined(ETL_VECTOR_FORCE_CPP03_IMPLEMENTATION)
    //*********************************************************************
    //*********************************************************************
    template <typename ... Args>
    reference emplace_back(Args && ... args)
    {
      T* p = storage.create<T>(etl::forward<Args>(args)...);
      lookup.push_back(p);
      return back();
    }
#else
    //*********************************************************************
    //*********************************************************************
    template <typename T1>
    reference emplace_back(const T1& value1)
    {
      T* p = storage.create<T>(T(value1));
      lookup.push_back(p);
      return back();
    }
 
    //*********************************************************************
    //*********************************************************************
    template <typename T1, typename T2>
    reference emplace_back(const T1& value1, const T2& value2)
    {
      T* p = storage.create<T>(T(value1, value2));
      lookup.push_back(p);
      return back();
    }
 
    //*********************************************************************
    //*********************************************************************
    template <typename T1, typename T2, typename T3>
    reference emplace_back(const T1& value1, const T2& value2, const T3& value3)
    {
      T* p = storage.create<T>(T(value1, value2, value3));
      lookup.push_back(p);
      return back();
    }
 
    //*********************************************************************
    //*********************************************************************
    template <typename T1, typename T2, typename T3, typename T4>
    reference emplace_back(const T1& value1, const T2& value2, const T3& value3, const T4& value4)
    {
      T* p = storage.create<T>(T(value1, value2, value3, value4));
      lookup.push_back(p);
      return back();
    }
#endif
 
    //*************************************************************************
    //*************************************************************************
    void pop_back()
    {
      ETL_ASSERT(!empty(), ETL_ERROR(vector_empty));
 
      reference object = back();
      storage.destroy<T>(etl::addressof(object));
      lookup.pop_back();
    }
 
    //*********************************************************************
    //*********************************************************************
    iterator insert(const_iterator position, const_reference value)
    {
      ETL_ASSERT(size() != capacity(), ETL_ERROR(vector_full));
 
      T* p = storage.create<T>(T(value));
      position = iterator(lookup.insert(position.lookup_itr, p));
 
      return to_iterator(position);
    }
 
#if ETL_USING_CPP11
    //*********************************************************************
    //*********************************************************************
    iterator insert(const_iterator position, rvalue_reference value)
    {
      ETL_ASSERT(size() != capacity(), ETL_ERROR(vector_full));
 
      T* p = storage.create<T>(T(etl::move(value)));
      position = iterator(lookup.insert(position.lookup_itr, p));
 
      return to_iterator(position);
    }
#endif
 
    //*************************************************************************
    //*************************************************************************
#if ETL_USING_CPP11 && ETL_NOT_USING_STLPORT
    template <typename ... Args>
    iterator emplace(iterator position, Args && ... args)
    {
      ETL_ASSERT(!full(), ETL_ERROR(vector_full));
 
      T* p = storage.create<T>(T(etl::forward<Args>(args)...));
      position = iterator(lookup.insert(position.lookup_itr, p));
 
      return position;
    }
#else
    template <typename T1>
    iterator emplace(iterator position, const T1& value1)
    {
      ETL_ASSERT(!full(), ETL_ERROR(vector_full));
 
      T* p = storage.create<T>(T(value1));
      position = iterator(lookup.insert(position.lookup_itr, p));
 
      return position;
    }
 
    template <typename T1, typename T2>
    iterator emplace(iterator position, const T1& value1, const T2& value2)
    {
      ETL_ASSERT(!full(), ETL_ERROR(vector_full));
 
      T* p = storage.create<T>(T(value1, value2));
      position = iterator(lookup.insert(position.lookup_itr, p));
 
      return position;
    }
 
    template <typename T1, typename T2, typename T3>
    iterator emplace(iterator position, const T1& value1, const T2& value2, const T3& value3)
    {
      ETL_ASSERT(!full(), ETL_ERROR(vector_full));
 
      T* p = storage.create<T>(T(value1, value2, value3));
      position = iterator(lookup.insert(position.lookup_itr, p));
 
      return position;
    }
 
    template <typename T1, typename T2, typename T3, typename T4>
    iterator emplace(iterator position, const T1& value1, const T2& value2, const T3& value3, const T4& value4)
    {
      ETL_ASSERT(!full(), ETL_ERROR(vector_full));
 
      T* p = storage.create<T>(T(value1, value2, value3, value4));
      position = iterator(lookup.insert(position.lookup_itr, p));
 
      return position;
    }
#endif
 
    //*********************************************************************
    //*********************************************************************
    iterator insert(const_iterator position, size_t n, parameter_t value)
    {
      ETL_ASSERT((size() + n) <= capacity(), ETL_ERROR(vector_full));
 
      iterator position_ = to_iterator(position);
 
      // Make space for the new lookup pointers.
      typename etl::ivector<T*>::iterator lookup_itr = position_.lookup_itr;
      lookup.insert(lookup_itr, n, ETL_NULLPTR);
 
      while (n-- != 0U)
      {
        T* p = storage.create<T>(value);
        *lookup_itr++ = p;
      }
 
      return position_;
    }
 
    //*********************************************************************
    //*********************************************************************
    template <class TIterator>
    iterator insert(const_iterator position, TIterator first, TIterator last)
    {
      size_t count = size_t(etl::distance(first, last));
 
      ETL_ASSERT((size() + count) <= capacity(), ETL_ERROR(vector_full));
 
      // Make space for the new lookup pointers.
      typename etl::ivector<T*>::iterator lookup_itr = to_iterator(position).lookup_itr;
      lookup.insert(lookup_itr, count, ETL_NULLPTR);
 
      while (first != last)
      {
        T* p = storage.create<T>(*first);
        *lookup_itr++ =  p;
        ++first;
      }
 
      return to_iterator(position);
    }
 
    //*********************************************************************
    //*********************************************************************
    iterator erase(iterator i_element)
    {
      storage.destroy<T>(etl::addressof(*i_element));
 
      return iterator(lookup.erase(i_element.lookup_itr));
    }
 
    //*********************************************************************
    //*********************************************************************
    iterator erase(const_iterator i_element)
    {
      storage.destroy<T>(etl::addressof(*i_element));
 
      return iterator(lookup.erase(i_element.lookup_itr));
    }
 
    //*********************************************************************
    //*********************************************************************
    iterator erase(const_iterator first, const_iterator last)
    {
      iterator element = to_iterator(first);
 
      while (element != last)
      {
        storage.destroy<T>(etl::addressof(*element));
        ++element;
      }
 
      lookup.erase(first.lookup_itr, last.lookup_itr);
 
      return to_iterator(last);
    }
 
    //*************************************************************************
    //*************************************************************************
    iindirect_vector& operator = (const iindirect_vector& rhs)
    {
      if (&rhs != this)
      {
        assign(rhs.cbegin(), rhs.cend());
      }
 
      return *this;
    }
 
#if ETL_USING_CPP11
    //*************************************************************************
    //*************************************************************************
    iindirect_vector& operator = (iindirect_vector&& rhs)
    {
      if (&rhs != this)
      {
        clear();
        iterator itr = rhs.begin();
        while (itr != rhs.end())
        {
          push_back(etl::move(*itr));
          ++itr;
        }
 
        rhs.initialise();
      }
 
      return *this;
    }
#endif
 
    //*************************************************************************
    //*************************************************************************
    size_type size() const
    {
      return lookup.size();
    }
 
    //*************************************************************************
    //*************************************************************************
    size_type capacity() const
    {
      return lookup.capacity();
    }
 
    //*************************************************************************
    //*************************************************************************
    bool empty() const
    {
      return lookup.empty();
    }
 
    //*************************************************************************
    //*************************************************************************
    bool full() const
    {
      return lookup.full();
    }
 
    //*************************************************************************
    //*************************************************************************
    size_type max_size() const
    {
      return lookup.max_size();
    }
 
    //*************************************************************************
    //*************************************************************************
    size_type available() const
    {
      return lookup.available();
    }
 
  protected:
 
    //*********************************************************************
    //*********************************************************************
    iindirect_vector(etl::ivector<T*>& lookup_, etl::ipool& storage_)
      : lookup(lookup_)
      , storage(storage_)
    {
    }
 
    //*********************************************************************
    //*********************************************************************
    void initialise()
    {
      iterator itr = begin();
 
      while (itr != end())
      {
        storage.destroy<T>(etl::addressof(*itr));
        ++itr;
      }
 
      lookup.clear();
    }
 
#if ETL_USING_CPP11
    //*********************************************************************
    //*********************************************************************
    void move_container(iindirect_vector&& other)
    {
      if (this != &other)
      {
        initialise();
 
        typename iindirect_vector<T>::iterator itr = other.begin();
 
        while (itr != other.end())
        {
          push_back(etl::move(*itr));
          ++itr;
        }
 
        other.initialise();
      }
    }
#endif
 
    etl::ivector<T*>& lookup;
    etl::ipool&       storage;
 
  private:
 
    // Disable copy construction.
    iindirect_vector(const iindirect_vector&) ETL_DELETE;
 
    //*************************************************************************
    //*************************************************************************
#if defined(ETL_POLYMORPHIC_INDIRECT_VECTOR) || defined(ETL_POLYMORPHIC_CONTAINERS)
  public:
    virtual
#else
  protected:
#endif
    ~iindirect_vector()
    {
    }
 
  protected:
 
    //*************************************************************************
    //*************************************************************************
    iterator to_iterator(const_iterator itr) const
    {
      return iterator(const_cast<indirect_iterator>(itr.lookup_itr));
    }
  };
 
  //***************************************************************************
  //***************************************************************************
  template <typename T>
  bool operator ==(const etl::iindirect_vector<T>& lhs, const etl::iindirect_vector<T>& rhs)
  {
    return (lhs.size() == rhs.size()) && etl::equal(lhs.begin(), lhs.end(), rhs.begin());
  }
 
  //***************************************************************************
  //***************************************************************************
  template <typename T>
  bool operator !=(const etl::iindirect_vector<T>& lhs, const etl::iindirect_vector<T>& rhs)
  {
    return !(lhs == rhs);
  }
 
  //***************************************************************************
  //***************************************************************************
  template <typename T>
  bool operator <(const etl::iindirect_vector<T>& lhs, const etl::iindirect_vector<T>& rhs)
  {
    return etl::lexicographical_compare(lhs.begin(), lhs.end(), rhs.begin(), rhs.end());
  }
 
  //***************************************************************************
  //***************************************************************************
  template <typename T>
  bool operator >(const etl::iindirect_vector<T>& lhs, const etl::iindirect_vector<T>& rhs)
  {
    return (rhs < lhs);
  }
 
  //***************************************************************************
  //***************************************************************************
  template <typename T>
  bool operator <=(const etl::iindirect_vector<T>& lhs, const etl::iindirect_vector<T>& rhs)
  {
    return !(lhs > rhs);
  }
 
  //***************************************************************************
  //***************************************************************************
  template <typename T>
  bool operator >=(const etl::iindirect_vector<T>& lhs, const etl::iindirect_vector<T>& rhs)
  {
    return !(lhs < rhs);
  }
 
  //***************************************************************************
  //***************************************************************************
  template <typename T, const size_t MAX_SIZE_>
  class indirect_vector : public etl::iindirect_vector<T>
  {
  public:
 
    ETL_STATIC_ASSERT((MAX_SIZE_ > 0U), "Zero capacity etl::indirect_vector is not valid");
 
    static ETL_CONSTANT size_t MAX_SIZE = MAX_SIZE_;
 
    //*************************************************************************
    //*************************************************************************
    indirect_vector()
      : etl::iindirect_vector<T>(lookup_vector, storage_pool)
    {
    }
 
    //*************************************************************************
    //*************************************************************************
    explicit indirect_vector(size_t initial_size)
      : etl::iindirect_vector<T>(lookup_vector, storage_pool)
    {
      this->resize(initial_size);
    }
 
    //*************************************************************************
    //*************************************************************************
    indirect_vector(size_t initial_size, typename etl::iindirect_vector<T>::parameter_t value)
      : etl::iindirect_vector<T>(lookup_vector, storage_pool)
    {
      this->resize(initial_size, value);
    }
 
    //*************************************************************************
    //*************************************************************************
    template <typename TIterator>
    indirect_vector(TIterator first, TIterator last)
      : etl::iindirect_vector<T>(lookup_vector, storage_pool)
    {
      this->assign(first, last);
    }
 
#if ETL_HAS_INITIALIZER_LIST
    //*************************************************************************
    //*************************************************************************
    indirect_vector(std::initializer_list<T> init)
      : etl::iindirect_vector<T>(lookup_vector, storage_pool)
    {
      this->assign(init.begin(), init.end());
    }
#endif
 
    //*************************************************************************
    //*************************************************************************
    indirect_vector(const indirect_vector& other)
      : etl::iindirect_vector<T>(lookup_vector, storage_pool)
    {
      this->assign(other.begin(), other.end());
    }
 
    //*************************************************************************
    //*************************************************************************
    indirect_vector& operator = (const indirect_vector& rhs)
    {
      if (&rhs != this)
      {
        this->assign(rhs.cbegin(), rhs.cend());
      }
 
      return *this;
    }
 
#if ETL_USING_CPP11
    //*************************************************************************
    //*************************************************************************
    indirect_vector(indirect_vector&& other)
      : etl::iindirect_vector<T>(lookup_vector, storage_pool)
    {
      this->move_container(etl::move(other));
    }
 
    //*************************************************************************
    //*************************************************************************
    indirect_vector& operator = (indirect_vector&& rhs)
    {
      this->move_container(etl::move(rhs));
 
      return *this;
    }
#endif
 
    //*************************************************************************
    //*************************************************************************
    ~indirect_vector()
    {
      this->clear();
    }
 
  private:
 
    etl::vector<T*, MAX_SIZE> lookup_vector;
    etl::pool<T, MAX_SIZE>    storage_pool;
  };
 
  template <typename T, const size_t MAX_SIZE_>
  ETL_CONSTANT size_t indirect_vector<T, MAX_SIZE_>::MAX_SIZE;
 
  //*************************************************************************
  //*************************************************************************
#if ETL_USING_CPP17 && ETL_HAS_INITIALIZER_LIST
  template <typename T, typename... Ts>
  indirect_vector(T, Ts...)
    ->indirect_vector<etl::enable_if_t<(etl::is_same_v<T, Ts> && ...), T>, 1U + sizeof...(Ts)>;
#endif 
 
  //*************************************************************************
  //*************************************************************************
#if ETL_USING_CPP11 && ETL_HAS_INITIALIZER_LIST
  template <typename... T>
  constexpr auto make_indirect_vector(T&&... t) -> etl::indirect_vector<typename etl::common_type_t<T...>, sizeof...(T)>
  {
    return { { etl::forward<T>(t)... } };
  }
#endif
 
  //***************************************************************************
  //***************************************************************************
  template <typename T>
  class indirect_vector_ext : public etl::iindirect_vector<T>
  {
  public:
 
    //*************************************************************************
    //*************************************************************************
    indirect_vector_ext(etl::ivector<T*>& lookup_, etl::ipool& pool_)
      : etl::iindirect_vector<T>(lookup_, pool_)
    {
      ETL_ASSERT(lookup_.capacity() <= pool_.capacity(), ETL_ERROR(indirect_vector_buffer_missmatch));
    }
 
    //*************************************************************************
    //*************************************************************************
    explicit indirect_vector_ext(size_t initial_size, etl::ivector<T*>& lookup_, etl::ipool& pool_)
      : etl::iindirect_vector<T>(lookup_, pool_)
    {
      ETL_ASSERT(lookup_.capacity() <= pool_.capacity(), ETL_ERROR(indirect_vector_buffer_missmatch));
      this->resize(initial_size);
    }
 
    //*************************************************************************
    //*************************************************************************
    indirect_vector_ext(size_t initial_size, typename etl::iindirect_vector<T>::parameter_t value, etl::ivector<T*>& lookup_, etl::ipool& pool_)
      : etl::iindirect_vector<T>(lookup_, pool_)
    {
      ETL_ASSERT(lookup_.capacity() <= pool_.capacity(), ETL_ERROR(indirect_vector_buffer_missmatch));
      this->resize(initial_size, value);
    }
 
    //*************************************************************************
    //*************************************************************************
    template <typename TIterator>
    indirect_vector_ext(TIterator first, TIterator last, etl::ivector<T*>& lookup_, etl::ipool& pool_)
      : etl::iindirect_vector<T>(lookup_, pool_)
    {
      ETL_ASSERT(lookup_.capacity() <= pool_.capacity(), ETL_ERROR(indirect_vector_buffer_missmatch));
      this->assign(first, last);
    }
 
#if ETL_HAS_INITIALIZER_LIST
    //*************************************************************************
    //*************************************************************************
    indirect_vector_ext(std::initializer_list<T> init, etl::ivector<T*>& lookup_, etl::ipool& pool_)
      : etl::iindirect_vector<T>(lookup_, pool_)
    {
      ETL_ASSERT(lookup_.capacity() <= pool_.capacity(), ETL_ERROR(indirect_vector_buffer_missmatch));
      this->assign(init.begin(), init.end());
    }
#endif
 
    //*************************************************************************
    //*************************************************************************
    indirect_vector_ext(const indirect_vector_ext& other, etl::ivector<T*>& lookup_, etl::ipool& pool_)
      : etl::iindirect_vector<T>(lookup_, pool_)
    {
      ETL_ASSERT(lookup_.capacity() <= pool_.capacity(), ETL_ERROR(indirect_vector_buffer_missmatch));
      this->assign(other.begin(), other.end());
    }
 
    //*************************************************************************
    //*************************************************************************
    indirect_vector_ext(const indirect_vector_ext& other) ETL_DELETE;
 
    //*************************************************************************
    //*************************************************************************
    indirect_vector_ext& operator = (const indirect_vector_ext& rhs)
    {
      if (&rhs != this)
      {
        this->assign(rhs.cbegin(), rhs.cend());
      }
 
      return *this;
    }
 
#if ETL_USING_CPP11
    //*************************************************************************
    //*************************************************************************
    indirect_vector_ext(indirect_vector_ext&& other, etl::ivector<T*>& lookup_, etl::ipool& pool_)
      : etl::iindirect_vector<T>(lookup_, pool_)
    {
      ETL_ASSERT(lookup_.capacity() <= pool_.capacity(), ETL_ERROR(indirect_vector_buffer_missmatch));
      this->move_container(etl::move(other));
    }
 
    //*************************************************************************
    //*************************************************************************
    indirect_vector_ext(indirect_vector_ext&& other) ETL_DELETE;
 
    //*************************************************************************
    //*************************************************************************
    indirect_vector_ext& operator = (indirect_vector_ext&& rhs)
    {
      this->move_container(etl::move(rhs));
 
      return *this;
    }
#endif
 
    //*************************************************************************
    //*************************************************************************
    ~indirect_vector_ext()
    {
      this->clear();
    }
  };
}
 
#endif