Vulkan-Hpp/tests/Hash/Hash.cpp

// Copyright(c) 2018, 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 : Hash
//                     Compile test on using std::hash on handles

#include "vulkan/vulkan.hpp"
#include <iostream>
#include <unordered_map>
#include <unordered_set>

static char const* AppName = "Hash";
static char const* EngineName = "Vulkan.hpp";

int main(int /*argc*/, char ** /*argv*/)
{
  try
  {
    vk::ApplicationInfo appInfo(AppName, 1, EngineName, 1, VK_API_VERSION_1_1);
    vk::UniqueInstance instance = vk::createInstanceUnique(vk::InstanceCreateInfo({}, &appInfo));

    auto h1 = std::hash<vk::Instance>{}(*instance);
    auto h2 = std::hash<VkInstance>{}(*instance);
    assert(h1 == h2);

    std::unordered_set<vk::Instance> uset;
    uset.insert(*instance);

    std::unordered_map<vk::Instance, size_t> umap;
    umap[*instance] = 1;
  }
  catch (vk::SystemError const& err)
  {
    std::cout << "vk::SystemError: " << err.what() << std::endl;
    exit(-1);
  }
  catch (...)
  {
    std::cout << "unknown error\n";
    exit(-1);
  }

  return 0;
}