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// Copyright (c) 1998-2003 ETH Zurich (Switzerland).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org).
// You can redistribute it and/or modify it under the terms of the GNU
// General Public License as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL: svn+ssh://scm.gforge.inria.fr/svn/cgal/branches/next/Matrix_search/include/CGAL/Transform_iterator.h $
// $Id: Transform_iterator.h 67117 2012-01-13 18:14:48Z lrineau $
//
//
// Author(s) : Michael Hoffmann <hoffmann@inf.ethz.ch>
#ifndef CGAL_TRANSFORM_ITERATOR_H
#define CGAL_TRANSFORM_ITERATOR_H
#include <CGAL/Optimisation/assertions.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 Operation::argument_type argument_type;
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; }
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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