Iterator.h

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/*
 * Iterator.h
 *
 * Copyright (C) 2011 IBR, TU Braunschweig
 *
 * Written-by: Johannes Morgenroth <morgenroth@ibr.cs.tu-bs.de>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

#ifndef IBRCOMMON_ITERATOR_H_
#define IBRCOMMON_ITERATOR_H_

#include <iterator>
#include <algorithm>

namespace ibrcommon
{
        template<class _ForwardIterator, class _Tp>
        class find_iterator : public _ForwardIterator
        {
                _ForwardIterator _next;
                _Tp _match;

        public:
                find_iterator(_ForwardIterator begin, const _Tp& __value)
                 : _ForwardIterator(begin), _next(begin), _match(__value)
                {
                }

                bool next(_ForwardIterator end)
                {
                        if (_next == end) return false;

                        ((_ForwardIterator&)*this) = std::find(_next, end, _match);

                        _next = ((_ForwardIterator&)*this);

                        if (_next == end)
                        {
                                return false;
                        }
                        else
                        {
                                _next++;
                                return true;
                        }
                }
        };
}

#endif /*IBRCOMMON_ITERATOR_H_*/