82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
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// Copyright (c) 1998-2003 ETH Zurich (Switzerland).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org).
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//
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// $URL: https://github.com/CGAL/cgal/blob/v5.1/Matrix_search/include/CGAL/Transform_iterator.h $
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// $Id: Transform_iterator.h 0779373 2020-03-26T13:31:46+01:00 Sébastien Loriot
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// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-Commercial
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//
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//
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// Author(s) : Michael Hoffmann <hoffmann@inf.ethz.ch>
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#ifndef CGAL_TRANSFORM_ITERATOR_H
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#define CGAL_TRANSFORM_ITERATOR_H
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#include <CGAL/license/Matrix_search.h>
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#include <CGAL/Optimisation/assertions.h>
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#include <CGAL/circulator_bases.h>
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#include <iterator>
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namespace std {
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struct _Unchecked_iterator_tag;
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}
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namespace CGAL {
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template < class OutputIterator, class Operation >
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struct Transform_iterator {
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// Workaround. Added this non standard iterator category for VC8.
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// Strange that no other iterator complains about this "feature" missing
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typedef std::_Unchecked_iterator_tag _Checked_iterator_category;
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typedef std::output_iterator_tag iterator_category;
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typedef Transform_iterator< OutputIterator, Operation > self;
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typedef typename Operation::argument_type argument_type;
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typedef typename std::iterator_traits<OutputIterator>::difference_type difference_type;
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typedef typename std::iterator_traits<OutputIterator>::value_type value_type;
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typedef typename std::iterator_traits<OutputIterator>::pointer pointer;
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typedef typename std::iterator_traits<OutputIterator>::reference reference;
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Transform_iterator( const OutputIterator& o,
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const Operation& op)
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: o_( o), op_( op)
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{}
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operator OutputIterator() { return o_; }
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self& operator*() { return *this; }
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self& operator++() { return *this; }
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self& operator++( int) { return *this; }
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self& operator=( const argument_type& a) {
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*(o_++) = op_( a);
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return *this;
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}
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private:
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OutputIterator o_;
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Operation op_;
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};
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template < class OutputIterator, class Operation > inline
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Transform_iterator< OutputIterator, Operation >
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transform_iterator( const OutputIterator& o,
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const Operation& op)
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{ return Transform_iterator< OutputIterator, Operation >( o, op); }
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template < class OutputIterator, class Operation > inline
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Iterator_tag
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query_circulator_or_iterator(
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const Transform_iterator< OutputIterator, Operation >&)
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{ return Iterator_tag(); }
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} //namespace CGAL
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#endif // CGAL_TRANSFORM_ITERATOR_H
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