vendor/llvm-project/llvmorg-15-init-15358-g53dc0f107877

1 files changed, 47 insertions, 0 deletions

diff --git a/libcxx/include/__algorithm/iterator_operations.h b/libcxx/include/__algorithm/iterator_operations.h
new file mode 100644
index 000000000000..c02f9bf649df
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+++ b/libcxx/include/__algorithm/iterator_operations.h
@@ -0,0 +1,47 @@
+//===----------------------------------------------------------------------===//
+//
+// 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___ALGORIHTM_ITERATOR_OPERATIONS_H
+#define _LIBCPP___ALGORIHTM_ITERATOR_OPERATIONS_H
+
+#include <__config>
+#include <__iterator/advance.h>
+#include <__iterator/distance.h>
+#include <__iterator/iterator_traits.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+struct _RangesIterOps {
+  static constexpr auto advance = ranges::advance;
+  static constexpr auto distance = ranges::distance;
+};
+#endif
+
+struct _StdIterOps {
+
+  template <class _Iterator, class _Distance>
+  _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR_AFTER_CXX11 void advance(_Iterator& __iter, _Distance __count) {
+    return std::advance(__iter, __count);
+  }
+
+  template <class _Iterator>
+  _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR_AFTER_CXX11
+  typename iterator_traits<_Iterator>::difference_type distance(_Iterator __first, _Iterator __last) {
+    return std::distance(__first, __last);
+  }
+
+};
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___ALGORIHTM_ITERATOR_OPERATIONS_H