[compiler-rt] [clang-tools-extra] [lld] [libcxx] [llvm] [flang] [clang] [libc++][ranges] P2116R9: Implements `views::enumerate` (PR #73617)

[Christopher Di Bella via cfe-commits]

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@@ -0,0 +1,129 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
+
+// <ranges>
+
+// class enumerate_view
+
+// constexpr auto begin() requires (!simple-view<V>);
+// constexpr auto begin() const requires range-with-movable-references<const V>;
+
+#include <cassert>
+#include <concepts>
+#include <ranges>
+
+#include "test_iterators.h"
+#include "types.h"
+
+// Helpers
+
+template <class T>
----------------
cjdb wrote:

I would prefer it if these were declared at their point of use, rather than at the top of the file (and same for other tests).

https://github.com/llvm/llvm-project/pull/73617