Vulkan-Hpp/tests/DesignatedInitializers/DesignatedInitializers.cpp

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// Copyright(c) 2020, 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 Tests : DesignatedInitializers
// Compile test on using designated initializers
#define VULKAN_HPP_NO_STRUCT_CONSTRUCTORS
#include "vulkan/vulkan.hpp"
#include <iostream>
#if defined(__clang__) || defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wunused-variable"
#endif
int main( int /*argc*/, char ** /*argv*/ )
{
char const * appName = "DesignatedInitializers";
uint32_t appVersion = 1;
char const * engineName = "Vulkan.hpp";
uint32_t engineVersion = 1;
// default initialization is available in any case
vk::ApplicationInfo ai0;
#if !defined( VULKAN_HPP_NO_STRUCT_CONSTRUCTORS )
// due to default initializers, any number of members can be initialized
// most IDEs will probably help with the order of the members !
vk::ApplicationInfo ai1( appName );
vk::ApplicationInfo ai2( appName, appVersion );
vk::ApplicationInfo ai3( appName, appVersion, engineName );
vk::ApplicationInfo ai4( appName, appVersion, engineName, engineVersion );
vk::ApplicationInfo ai5( appName, appVersion, engineName, engineVersion, VK_API_VERSION_1_2 );
// a structure in namespace vk:: can be copied from the corresponding vulkan C-struct
VkApplicationInfo vai;
vk::ApplicationInfo ai6( vai );
#else
// aggregate initialization: need to explicitly specify sType and pNext, as well as all the other members !
vk::ApplicationInfo ai1{
vk::StructureType::eApplicationInfo, nullptr, appName, appVersion, engineName, engineVersion, VK_API_VERSION_1_2
};
# if ( 20 <= VULKAN_HPP_CPP_VERSION )
// designated initializers are available with C++20
// it's allowed, but not recommended to explicitly specify sType
vk::ApplicationInfo ai2 = { .sType = vk::StructureType::eApplicationInfo };
// any number of the members can be specified; the order has to be respected
vk::ApplicationInfo ai3 = { .pApplicationName = appName };
vk::ApplicationInfo ai4 = { .applicationVersion = 1, .engineVersion = 2 };
vk::ApplicationInfo ai5{ .pEngineName = engineName };
vk::ApplicationInfo ai6{ .pApplicationName = appName, .apiVersion = VK_API_VERSION_1_2 };
# endif
#endif
return 0;
}