File indexing completed on 2024-04-14 14:12:12

 /*
     SPDX-FileCopyrightText: 2021 Valentin Boettcher <hiro at protagon.space; @hiro98:tchncs.de>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 /**
  * This header contains a cherry-picked version of the GSL `final_action`
  * as it is quite useful. You can see it in action over at
  * `kstars/datahandlers/catalogsdb.h`
  *
  * Further reading: http://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Re-finally
  * Source: https://github.com/Microsoft/GSL
  */
 
 #pragma once
 
 namespace gsl
 {
 // final_action allows you to ensure something gets run at the end of a scope
 template <class F>
 class final_action
 {
   public:
     static_assert(!std::is_reference<F>::value && !std::is_const<F>::value &&
                       !std::is_volatile<F>::value,
                   "Final_action should store its callable by value");
 
     explicit final_action(F f) noexcept : f_(std::move(f)) {}
 
     final_action(final_action &&other) noexcept
         : f_(std::move(other.f_)), invoke_(std::exchange(other.invoke_, false))
     {
     }
 
     final_action(const final_action &) = delete;
     final_action &operator=(const final_action &) = delete;
     final_action &operator=(final_action &&) = delete;
 
     ~final_action() noexcept
     {
         if (invoke_)
             f_();
     }
 
   private:
     F f_;
     bool invoke_{ true };
 };
 
 template <class F>
 final_action<typename std::remove_cv<typename std::remove_reference<F>::type>::type>
 finally(F &&f) noexcept
 {
     return final_action<
         typename std::remove_cv<typename std::remove_reference<F>::type>::type>(
         std::forward<F>(f));
 }
 } // namespace gsl