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authorMichele Calgaro <michele.calgaro@yahoo.it>2020-12-15 11:30:44 +0900
committerMichele Calgaro <michele.calgaro@yahoo.it>2020-12-15 23:05:24 +0900
commit4bd4ac21f11fdb5b76ffda985397398102a81e9b (patch)
tree61b0afd406a0d7554ed4fa85413a53c63f3e2324 /indexlib/boost-compat/next_prior.h
parent53a24d5c1f80c64dbd28825b546748a3ae36049e (diff)
downloadtdepim-4bd4ac21f11fdb5b76ffda985397398102a81e9b.tar.gz
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Renaming of files in preparation for code style tools.
Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it> (cherry picked from commit 3a75bdfe83b71ef1dbc2fbf52f2d18b8174e22e5)
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+// Boost next_prior.h header file ---------------------------------------//
+
+// (C) Copyright Dave Abrahams and Daniel Walker 1999-2003. Distributed under the Boost
+// Software License, Version 1.0. (See accompanying file
+// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// See http://www.boost.org/libs/utility for documentation.
+
+// Revision History
+// 13 Dec 2003 Added next(x, n) and prior(x, n) (Daniel Walker)
+
+#ifndef BOOST_NEXT_PRIOR_H_INCLUDED
+#define BOOST_NEXT_PRIOR_H_INCLUDED
+
+#include <iterator>
+
+namespace boost {
+
+// Helper functions for classes like bidirectional iterators not supporting
+// operator+ and operator-
+//
+// Usage:
+// const std::list<T>::iterator p = get_some_iterator();
+// const std::list<T>::iterator prev = boost::prior(p);
+// const std::list<T>::iterator next = boost::next(prev, 2);
+
+// Contributed by Dave Abrahams
+
+template <class T>
+inline T next(T x) { return ++x; }
+
+template <class T, class Distance>
+inline T next(T x, Distance n)
+{
+ std::advance(x, n);
+ return x;
+}
+
+template <class T>
+inline T prior(T x) { return --x; }
+
+template <class T, class Distance>
+inline T prior(T x, Distance n)
+{
+ std::advance(x, -n);
+ return x;
+}
+
+} // namespace boost
+
+#endif // BOOST_NEXT_PRIOR_H_INCLUDED