Fixes #494: Avoid using library functionality with variadic template-…

…template parameters when compiling with MSVC

examples/modified_cuda_samples/vectorAddMMAP/vectorAddMMAP.cpp

@@ -160,8 +160,17 @@ setup_virtual_memory(cuda::size_t desired_region_size,
 		}
 	);
 
+#ifndef _MSC_VER
 	virtual_mem::set_access_mode(reserved_range.region(), mapping_devices,
 		cuda::memory::access_permissions_t::read_and_write());
+#else
+	// MSVC, at least as of 2019, can't handle template-template parameters with variadcs properly;
+	// so let's go manual:
+	for(const auto& mapping_device : mapping_devices) {
+		virtual_mem::set_access_mode(reserved_range.region(), mapping_device,
+			cuda::memory::access_permissions_t::read_and_write());
+	}
+#endif
 
 	return { std::move(reserved_range), std::move(mappings) };
 }