96 lines
2.3 KiB
C++
96 lines
2.3 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2016 CERN
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef __ITERATORS_H
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#define __ITERATORS_H
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#include <dlist.h>
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#include <iterator>
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template <class T>
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class DLIST_ITERATOR : public std::iterator<std::bidirectional_iterator_tag, T>
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{
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private:
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T m_obj;
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using reference = typename DLIST_ITERATOR<T>::reference;
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public:
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explicit DLIST_ITERATOR<T>( T obj ) :
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m_obj(obj) {}
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DLIST_ITERATOR<T>& operator++()
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{
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m_obj = m_obj->Next(); return *this;
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}
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DLIST_ITERATOR<T>& operator--()
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{
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m_obj = m_obj->Prev(); return *this;
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}
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bool operator==( DLIST_ITERATOR<T> other ) const
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{
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return m_obj == other.m_obj;
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}
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bool operator!=( DLIST_ITERATOR<T> other ) const
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{
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return !(*this == other);
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}
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reference operator*()
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{
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return m_obj;
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}
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};
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// helper object, used to convert a DLIST<T> to an iterator
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template <class T>
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class DLIST_ITERATOR_WRAPPER
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{
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public:
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explicit DLIST_ITERATOR_WRAPPER<T> ( DLIST<T>& list ) :
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m_list(list) {}
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DLIST_ITERATOR<T*> begin()
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{
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return DLIST_ITERATOR<T*> ( m_list.GetFirst() );
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}
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DLIST_ITERATOR<T*> end()
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{
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return DLIST_ITERATOR<T*> ( nullptr );
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}
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unsigned int Size() const
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{
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return m_list.GetCount();
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}
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private:
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DLIST<T>& m_list;
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};
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#endif
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