[libcxx-commits] [libcxx] [libc++] <experimental/simd> Add assignment operator of simd reference (PR #70020)

[via libcxx-commits]

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@@ -0,0 +1,79 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+
+// <experimental/simd>
+//
+// [simd.reference]
+// template<class U> reference=(U&& x) && noexcept;
+
+#include "../test_utils.h"
+#include <experimental/simd>
+
+namespace ex = std::experimental::parallelism_v2;
+
+template <class T, class SimdAbi>
+struct CheckSimdReferenceAssignmentHelper {
+  template <class U>
+  void operator()() const {
+    if constexpr (std::is_assignable_v<T&, U&&>) {
+      ex::simd<T, SimdAbi> origin_simd([](T i) { return i; });
+      for (size_t i = 0; i < origin_simd.size(); ++i) {
+        origin_simd[i] = static_cast<U>(i + 1);
+        assert(origin_simd[i] == static_cast<T>(std::forward<U>(i + 1)));
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philnik777 wrote:

Please add a check to make sure `operator=` is `noexpect`.

https://github.com/llvm/llvm-project/pull/70020