From cf0f87b68e84f09ab1aa14812b172bc67ba75822 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jakub=20Klinkovsk=C3=BD?=
 <lahwaacz@users.noreply.github.com>
Date: Wed, 6 May 2026 07:58:27 +0000
Subject: [PATCH] Fix invalid C++ syntax: remove leading :: after struct in
 proclaims_copyable_arguments specializations (#8771)

(cherry picked from commit 8e41eeabe54ab9ae48ad5640cfa7153b0a1071af)
---
 cub/cub/device/device_transform.cuh                 | 5 ++++-
 cub/cub/device/dispatch/tuning/tuning_transform.cuh | 6 ++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/cub/cub/device/device_transform.cuh b/cub/cub/device/device_transform.cuh
index b09a054c3aa..4191e489081 100644
--- a/cub/cub/device/device_transform.cuh
+++ b/cub/cub/device/device_transform.cuh
@@ -41,9 +41,12 @@ struct __return_constant
 } // namespace detail
 CUB_NAMESPACE_END
 
+namespace cuda
+{
 template <typename T>
-struct ::cuda::proclaims_copyable_arguments<CUB_NS_QUALIFIER::detail::__return_constant<T>> : ::cuda::std::true_type
+struct proclaims_copyable_arguments<CUB_NS_QUALIFIER::detail::__return_constant<T>> : ::cuda::std::true_type
 {};
+} // namespace cuda
 
 CUB_NAMESPACE_BEGIN
 namespace detail::transform
diff --git a/cub/cub/device/dispatch/tuning/tuning_transform.cuh b/cub/cub/device/dispatch/tuning/tuning_transform.cuh
index ef6acf208e0..210866add05 100644
--- a/cub/cub/device/dispatch/tuning/tuning_transform.cuh
+++ b/cub/cub/device/dispatch/tuning/tuning_transform.cuh
@@ -47,10 +47,12 @@ struct always_true_predicate
 } // namespace detail::transform
 CUB_NAMESPACE_END
 
+namespace cuda
+{
 template <>
-struct ::cuda::proclaims_copyable_arguments<CUB_NS_QUALIFIER::detail::transform::always_true_predicate>
-    : ::cuda::std::true_type
+struct proclaims_copyable_arguments<CUB_NS_QUALIFIER::detail::transform::always_true_predicate> : ::cuda::std::true_type
 {};
+} // namespace cuda
 
 CUB_NAMESPACE_BEGIN
 namespace detail::transform