/* This file is part of the Gudhi Library. The Gudhi library
* (Geometric Understanding in Higher Dimensions) is a generic C++
* library for computational topology.
*
* Author(s): Marc Glisse
*
* Copyright (C) 2017 INRIA
*
* This program is free software: 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
#ifndef NULL_OUTPUT_ITERATOR_H_
#define NULL_OUTPUT_ITERATOR_H_
#include
namespace Gudhi {
/** An output iterator that ignores whatever it is given. */
struct Null_output_iterator {
typedef std::output_iterator_tag iterator_category;
typedef void value_type;
typedef void difference_type;
typedef void pointer;
typedef void reference;
Null_output_iterator& operator++() {return *this;}
Null_output_iterator operator++(int) {return *this;}
struct proxy {
template
proxy& operator=(T&&){return *this;}
};
proxy operator*()const{return {};}
};
} // namespace Gudhi
#endif // NULL_OUTPUT_ITERATOR_H_