Introduce raii-compliant handle wrapper classes.

RAII_Samples/02_EnumerateDevices/02_EnumerateDevices.cpp

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+// Copyright(c) 2018-2019, NVIDIA CORPORATION. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// VulkanHpp Samples : 02_EnumerateDevicesRAII
+//                     Enumerate physical devices
+
+#if defined( _MSC_VER )
+// no need to ignore any warnings with MSVC
+#elif defined( __clang__ )
+#  pragma clang diagnostic ignored "-Wunused-variable"
+#elif defined( __GNUC__ )
+#  pragma GCC diagnostic ignored "-Wunused-but-set-variable"
+#else
+// unknow compiler... just ignore the warnings for yourselves ;)
+#endif
+
+#include "../utils/utils.hpp"
+
+#include <iostream>
+
+static std::string AppName    = "02_EnumerateDevicesRAII";
+static std::string EngineName = "Vulkan.hpp";
+
+int main( int /*argc*/, char ** /*argv*/ )
+{
+  try
+  {
+    std::unique_ptr<vk::raii::Context>  context  = vk::raii::su::make_unique<vk::raii::Context>();
+    std::unique_ptr<vk::raii::Instance> instance = vk::raii::su::makeUniqueInstance( *context, AppName, EngineName );
+#if !defined( NDEBUG )
+    std::unique_ptr<vk::raii::DebugUtilsMessengerEXT> debugUtilsMessenger =
+      vk::raii::su::makeUniqueDebugUtilsMessengerEXT( *instance );
+#endif
+
+    /* VULKAN_HPP_KEY_START */
+
+    // enumerate the physicalDevices
+    vk::raii::PhysicalDevices physicalDevices( *instance );
+
+    /* VULKAN_HPP_KEY_END */
+  }
+  catch ( vk::SystemError & err )
+  {
+    std::cout << "vk::SystemError: " << err.what() << std::endl;
+    exit( -1 );
+  }
+  catch ( std::exception & err )
+  {
+    std::cout << "std::exception: " << err.what() << std::endl;
+    exit( -1 );
+  }
+  catch ( ... )
+  {
+    std::cout << "unknown error\n";
+    exit( -1 );
+  }
+  return 0;
+}