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// Copyright (c) 1998-2003 ETH Zurich (Switzerland).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
//
// $URL: https://github.com/CGAL/cgal/blob/v6.1/Matrix_search/include/CGAL/Transform_iterator.h $
// $Id: include/CGAL/Transform_iterator.h b26b07a1242 $
// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
//
//
// Author(s) : Michael Hoffmann <hoffmann@inf.ethz.ch>
#ifndef CGAL_TRANSFORM_ITERATOR_H
#define CGAL_TRANSFORM_ITERATOR_H
#include <CGAL/license/Matrix_search.h>
#include <CGAL/circulator_bases.h>
#include <iterator>
namespace std {
struct _Unchecked_iterator_tag;
}
namespace CGAL {
template < class OutputIterator, class Operation >
struct Transform_iterator {
// Workaround. Added this non standard iterator category for VC8.
// Strange that no other iterator complains about this "feature" missing
typedef std::_Unchecked_iterator_tag _Checked_iterator_category;
typedef std::output_iterator_tag iterator_category;
typedef Transform_iterator< OutputIterator, Operation > self;
typedef typename std::iterator_traits<OutputIterator>::difference_type difference_type;
typedef typename std::iterator_traits<OutputIterator>::value_type value_type;
typedef typename std::iterator_traits<OutputIterator>::pointer pointer;
typedef typename std::iterator_traits<OutputIterator>::reference reference;
Transform_iterator( const OutputIterator& o,
const Operation& op)
: o_( o), op_( op)
{}
operator OutputIterator() { return o_; }
self& operator*() { return *this; }
self& operator++() { return *this; }
self& operator++( int) { return *this; }
template <typename argument_type>
self& operator=( const argument_type& a) {
*(o_++) = op_( a);
return *this;
}
private:
OutputIterator o_;
Operation op_;
};
template < class OutputIterator, class Operation > inline
Transform_iterator< OutputIterator, Operation >
transform_iterator( const OutputIterator& o,
const Operation& op)
{ return Transform_iterator< OutputIterator, Operation >( o, op); }
template < class OutputIterator, class Operation > inline
Iterator_tag
query_circulator_or_iterator(
const Transform_iterator< OutputIterator, Operation >&)
{ return Iterator_tag(); }
} //namespace CGAL
#endif // CGAL_TRANSFORM_ITERATOR_H
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