[libcxx-commits] [libcxx] [libc++] Implement P1789R3: Library Support for Expansion Statements (PR #167184)

[Matthias Wippich via libcxx-commits]

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@@ -0,0 +1,23 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// REQUIRES: std-at-least-c++26
+
+// <utility>
+
+// template<size_t I, class T, T... Values>
+//   [[nodiscard]] constexpr T get(integer_sequence<T, Values...>) noexcept;
+
+// check that get is marked [[nodiscard]]
+
+#include <utility>
+
+void test() {
+  std::index_sequence<1> seq;
+  get<0>(seq); // expected-warning {{ignoring return value of function}}
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Tsche wrote:

I've re-requested review since this is still marked as "changes requested" :)

https://github.com/llvm/llvm-project/pull/167184