mirror of https://github.com/CGAL/cgal
89 lines
2.2 KiB
C++
89 lines
2.2 KiB
C++
// Copyright (c) 1997
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// Utrecht University (The Netherlands),
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// ETH Zurich (Switzerland),
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// INRIA Sophia-Antipolis (France),
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// Max-Planck-Institute Saarbruecken (Germany),
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// and Tel-Aviv University (Israel). 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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// $URL$
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// $Id$
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// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
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//
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//
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// Author(s) : Lutz Kettner <kettner@inf.ethz.ch>
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#ifndef CGAL_IO_OSTREAM_ITERATOR_H
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#define CGAL_IO_OSTREAM_ITERATOR_H
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#include <CGAL/circulator.h>
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namespace CGAL {
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namespace Stream_support {
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namespace internal {
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// This proxy is for the Ostream_iterator.
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template <class T, class Stream>
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class Ostream_proxy
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{
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Stream& stream;
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public:
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Ostream_proxy(Stream& s) : stream(s) {}
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Ostream_proxy<T, Stream>& operator=( const T& t)
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{
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stream << t;
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return *this;
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}
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};
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} // namespace Stream_support
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} // namespace internal
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/*!
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\ingroup PkgStreamSupportRef
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The class `Ostream_iterator` is an output iterator adaptor for the
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output stream class `Stream` and value type `T`.
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\cgalModels{OutputIterator}
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\cgalHeading{Implementation}
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The `operator*()` in class `Ostream_iterator` uses a proxy class.
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*/
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template <class T, class Stream>
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class Ostream_iterator
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{
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Stream* stream;
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public:
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typedef T value_type;
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typedef T& reference;
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typedef const T& const_reference;
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typedef T* pointer;
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typedef const T* const_pointer;
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typedef std::ptrdiff_t difference_type;
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typedef std::output_iterator_tag iterator_category;
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typedef Stream_support::internal::Ostream_proxy<T, Stream> Ostream_proxy;
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/// \name Creation
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/// @{
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/*!
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creates an output iterator writing to `s`.
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*/
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Ostream_iterator(Stream& s) : stream(&s) {}
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/// @}
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Ostream_iterator<T,Stream>& operator++() { return *this;}
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Ostream_iterator<T,Stream> operator++(int) { return *this;}
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Ostream_proxy operator*() const { return Ostream_proxy(*stream); }
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};
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} // namespace CGAL
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#endif // CGAL_IO_OSTREAM_ITERATOR_H
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