add trait IsKernelTriviallyCopyable

include/alpaka/kernel/Traits.hpp

@@ -248,6 +248,19 @@ namespace alpaka
         }
     } // namespace detail
 
+    template<typename T, typename = void>
+	struct IsKernelTriviallyCopyable
+#if BOOST_COMP_NVCC
+	: std::bool_constant<std::is_trivially_copyable_v<T> || __nv_is_extended_device_lambda_closure_type(T) || __nv_is_extended_host_device_lambda_closure_type(T)>
+#else
+	: std::bool_constant<std::is_trivially_copyable_v<T>>
+#endif
+	{
+    };
+
+	template<typename T>
+	inline constexpr bool isKernelTriviallyCopyable = IsKernelTriviallyCopyable<T>::value;
+
 //! Creates a kernel execution task.
 //!
 //! \tparam TAcc The accelerator type.
@@ -266,11 +279,10 @@ namespace alpaka
 
 #if BOOST_COMP_NVCC
         static_assert(
-            std::is_trivially_copyable_v<TKernelFnObj> || __nv_is_extended_device_lambda_closure_type(TKernelFnObj)
-                || __nv_is_extended_host_device_lambda_closure_type(TKernelFnObj),
+		    isKernelTriviallyCopyable<TKernelFnObj>,
             "Kernels must be trivially copyable or an extended CUDA lambda expression!");
 #else
-        static_assert(std::is_trivially_copyable_v<TKernelFnObj>, "Kernels must be trivially copyable!");
+        static_assert(isKernelTriviallyCopyable<TKernelFnObj>, "Kernels must be trivially copyable!");
 #endif
         (detail::assertKernelArgIsTriviallyCopyable<std::decay_t<TArgs>>(), ...);
         static_assert(