[libcxx-commits] [libcxx] [libc++] implement adjacent_view (PR #165089)

[Louis Dionne via libcxx-commits]

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@@ -0,0 +1,49 @@
+
+// -*- 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___RANGES_ZIP_VIEW_H
+#define _LIBCPP___RANGES_ZIP_VIEW_H
+
+#include <__config>
+
+#include <__functional/invoke.h>
+#include <__utility/forward.h>
+#include <tuple>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+_LIBCPP_PUSH_MACROS
+#include <__undef_macros>
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#if _LIBCPP_STD_VER >= 23
+
+namespace ranges {
+
+template <class _Fun, class _Tuple>
+_LIBCPP_HIDE_FROM_ABI constexpr auto __tuple_transform(_Fun&& __f, _Tuple&& __tuple) {
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ldionne wrote:

Let's move this to `libcxx/include/__tuple/transform.h` instead? This is general-purpose.

This can also go out of the `ranges::` namespace.

https://github.com/llvm/llvm-project/pull/165089