Imported Upstream version 1.65.0upstream/1.65.0

Change-Id: Icf8400b375482cb11bcf77440a6934ba360d6ba4
Signed-off-by: DongHun Kwak <dh0128.kwak@samsung.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/boost/algorithm/cxx17/transform_inclusive_scan.hpp b/boost/algorithm/cxx17/transform_inclusive_scan.hpp
new file mode 100644
index 0000000000..476c117f92
--- /dev/null
+++ b/boost/algorithm/cxx17/transform_inclusive_scan.hpp
@@ -0,0 +1,58 @@
+/*
+   Copyright (c) Marshall Clow 2017.
+
+   Distributed under the Boost Software License, Version 1.0. (See accompanying
+   file LICENSE10.txt or copy at http://www.boost.org/LICENSE10.txt)
+*/
+
+/// \file  transform_reduce.hpp
+/// \brief Combine the (transformed) elements of a sequence (or two) into a single value.
+/// \author Marshall Clow
+
+#ifndef BOOST_ALGORITHM_TRANSFORM_REDUCE_HPP
+#define BOOST_ALGORITHM_TRANSFORM_REDUCE_HPP
+
+#include <functional>     // for std::plus
+#include <iterator>       // for std::iterator_traits
+
+#include <boost/range/begin.hpp>
+#include <boost/range/end.hpp>
+#include <boost/range/value_type.hpp>
+
+namespace boost { namespace algorithm {
+
+template<class InputIterator, class OutputIterator,
+         class BinaryOperation, class UnaryOperation, class T>
+OutputIterator transform_inclusive_scan(InputIterator first, InputIterator last,
+                                        OutputIterator result,
+                                        BinaryOperation bOp, UnaryOperation uOp,
+                                        T init)
+{
+    for (; first != last; ++first, (void) ++result) {
+        init = bOp(init, uOp(*first));
+        *result = init;
+        }
+
+    return result;
+}
+
+template<class InputIterator, class OutputIterator,
+         class BinaryOperation, class UnaryOperation>
+OutputIterator transform_inclusive_scan(InputIterator first, InputIterator last,
+                                        OutputIterator result,
+                                        BinaryOperation bOp, UnaryOperation uOp)
+{
+    if (first != last) {
+        typename std::iterator_traits<InputIterator>::value_type init = uOp(*first);
+        *result++ = init;
+        if (++first != last)
+            return transform_inclusive_scan(first, last, result, bOp, uOp, init);
+        }
+
+    return result;
+}
+
+
+}} // namespace boost and algorithm
+
+#endif // BOOST_ALGORITHM_TRANSFORM_REDUCE_HPP