From d4c552ff94ea45def121ca346ab778e41627637b Mon Sep 17 00:00:00 2001
From: Hartmut Kaiser <hartmut.kaiser@gmail.com>
Date: Tue, 26 Nov 2024 17:41:38 -0600
Subject: [PATCH] Recent HPX master has changed some namespaces for the
 executor traits specialization

---
 include/cppuddle/common/config.hpp                          | 6 ++++++
 .../detail/aggregation_executors_and_allocators.hpp         | 6 +++---
 tests/work_aggregation_cpu_triad.cpp                        | 5 +++--
 tests/work_aggregation_test.cpp                             | 5 +++--
 4 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/include/cppuddle/common/config.hpp b/include/cppuddle/common/config.hpp
index 2ff888a6..2c087644 100644
--- a/include/cppuddle/common/config.hpp
+++ b/include/cppuddle/common/config.hpp
@@ -67,4 +67,10 @@ inline size_t get_device_id(const size_t number_gpus) {
 
 } // end namespace cppuddle
 
+#if HPX_VERSION_FULL >= 0x011100
+#define CPPUDDLE_HPX_EXECUTOR_SPECIALIZATION_NS hpx::execution::experimental
+#else
+#define CPPUDDLE_HPX_EXECUTOR_SPECIALIZATION_NS hpx::parallel::execution
+#endif
+
 #endif
diff --git a/include/cppuddle/kernel_aggregation/detail/aggregation_executors_and_allocators.hpp b/include/cppuddle/kernel_aggregation/detail/aggregation_executors_and_allocators.hpp
index a2b8b4b0..93bd6dd4 100644
--- a/include/cppuddle/kernel_aggregation/detail/aggregation_executors_and_allocators.hpp
+++ b/include/cppuddle/kernel_aggregation/detail/aggregation_executors_and_allocators.hpp
@@ -1039,9 +1039,9 @@ operator!=(allocator_slice<T, Host_Allocator, Executor> const &,
 
 
 
-namespace hpx { namespace parallel { namespace execution {
+namespace CPPUDDLE_HPX_EXECUTOR_SPECIALIZATION_NS {
    // TODO Unfortunately does not work that way! Create trait that works for Executor Slices with 
-   // compatible unlying executor types
+   // compatible underlying executor types
     /* template<typename E> */
     /* struct is_one_way_executor<typename aggregated_executor<E>::executor_slice> */
     /*   : std::true_type */
@@ -1064,6 +1064,6 @@ struct is_two_way_executor<
         hpx::cuda::experimental::cuda_executor>::executor_slice>
     : std::true_type {};
 #endif
-}}}
+}
 
 #endif
diff --git a/tests/work_aggregation_cpu_triad.cpp b/tests/work_aggregation_cpu_triad.cpp
index d65c9668..8419a44b 100644
--- a/tests/work_aggregation_cpu_triad.cpp
+++ b/tests/work_aggregation_cpu_triad.cpp
@@ -5,6 +5,7 @@
 #include <hpx/futures/future.hpp>
 #undef NDEBUG
 
+#include "cppuddle/common/config.hpp"
 #include "cppuddle/memory_recycling/std_recycling_allocators.hpp"
 #include "cppuddle/kernel_aggregation/kernel_aggregation_interface.hpp"
 
@@ -71,7 +72,7 @@ struct Dummy_Executor {
   }
 };
 
-namespace hpx { namespace parallel { namespace execution {
+namespace CPPUDDLE_HPX_EXECUTOR_SPECIALIZATION_NS {
     template <>
     struct is_one_way_executor<Dummy_Executor>
       : std::true_type
@@ -85,7 +86,7 @@ namespace hpx { namespace parallel { namespace execution {
     {
         // we support returning a waitable/future
     };
-}}}
+}
 
 
 //===============================================================================
diff --git a/tests/work_aggregation_test.cpp b/tests/work_aggregation_test.cpp
index abe827f4..ef912e7b 100644
--- a/tests/work_aggregation_test.cpp
+++ b/tests/work_aggregation_test.cpp
@@ -12,6 +12,7 @@
 
 #include <boost/program_options.hpp>
 
+#include "cppuddle/common/config.hpp"
 #include "cppuddle/memory_recycling/cuda_recycling_allocators.hpp"
 #include "cppuddle/memory_recycling/util/cuda_recycling_device_buffer.hpp"
 #include "cppuddle/executor_recycling/executor_pools_interface.hpp""
@@ -96,7 +97,7 @@ struct Dummy_Executor {
   }
 };
 
-namespace hpx { namespace parallel { namespace execution {
+namespace CPPUDDLE_HPX_EXECUTOR_SPECIALIZATION_NS {
     template <>
     struct is_one_way_executor<Dummy_Executor>
       : std::true_type
@@ -110,7 +111,7 @@ namespace hpx { namespace parallel { namespace execution {
     {
         // we support returning a waitable/future
     };
-}}}
+}
 
 //===============================================================================
 //===============================================================================