Merge branch 'dfsg/latest' into debian/sid

1 files changed, 36 insertions, 0 deletions

diff --git a/src/common/include/gudhi/Null_output_iterator.h b/src/common/include/gudhi/Null_output_iterator.h
new file mode 100644
index 00000000..3d03bca6
--- /dev/null
+++ b/src/common/include/gudhi/Null_output_iterator.h
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+/*    This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
+ *    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
+ *    Author(s):       Marc Glisse
+ *
+ *    Copyright (C) 2017 Inria
+ *
+ *    Modification(s):
+ *      - YYYY/MM Author: Description of the modification
+ */
+
+#ifndef NULL_OUTPUT_ITERATOR_H_
+#define NULL_OUTPUT_ITERATOR_H_
+
+#include <iterator>
+
+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<class T>
+    proxy& operator=(T&&){return *this;}
+  };
+  proxy operator*()const{return {};}
+};
+}  // namespace Gudhi
+
+#endif  // NULL_OUTPUT_ITERATOR_H_