1 files changed, 60 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__numeric/inclusive_scan.h b/contrib/llvm-project/libcxx/include/__numeric/inclusive_scan.h
new file mode 100644
index 000000000000..a6b005075835
--- /dev/null
+++ b/contrib/llvm-project/libcxx/include/__numeric/inclusive_scan.h
@@ -0,0 +1,60 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP___NUMERIC_INCLUSIVE_SCAN_H
+#define _LIBCPP___NUMERIC_INCLUSIVE_SCAN_H
+
+#include <__config>
+#include <__functional/operations.h>
+#include <__iterator/iterator_traits.h>
+#include <__utility/move.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#if _LIBCPP_STD_VER > 14
+
+template <class _InputIterator, class _OutputIterator, class _Tp, class _BinaryOp>
+_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator
+inclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryOp __b, _Tp __init) {
+  for (; __first != __last; ++__first, (void)++__result) {
+    __init = __b(__init, *__first);
+    *__result = __init;
+  }
+  return __result;
+}
+
+template <class _InputIterator, class _OutputIterator, class _BinaryOp>
+_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator
+inclusive_scan(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryOp __b) {
+  if (__first != __last) {
+    typename iterator_traits<_InputIterator>::value_type __init = *__first;
+    *__result++ = __init;
+    if (++__first != __last)
+      return _VSTD::inclusive_scan(__first, __last, __result, __b, __init);
+  }
+
+  return __result;
+}
+
+template <class _InputIterator, class _OutputIterator>
+_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _OutputIterator inclusive_scan(_InputIterator __first,
+                                                                                       _InputIterator __last,
+                                                                                       _OutputIterator __result) {
+  return _VSTD::inclusive_scan(__first, __last, __result, _VSTD::plus<>());
+}
+
+#endif // _LIBCPP_STD_VER > 14
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___NUMERIC_INCLUSIVE_SCAN_H