.. _program_listing_file__tmp_ws_src_rmw_connextdds_rmw_connextdds_common_include_rmw_connextdds_scope_exit.hpp:

Program Listing for File scope_exit.hpp
=======================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_rmw_connextdds_rmw_connextdds_common_include_rmw_connextdds_scope_exit.hpp>` (``/tmp/ws/src/rmw_connextdds/rmw_connextdds_common/include/rmw_connextdds/scope_exit.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // Copyright 2015-2020 Open Source Robotics Foundation, Inc.
   //
   // 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.
   
   #ifndef RMW_CONNEXTDDS__SCOPE_EXIT_HPP_
   #define RMW_CONNEXTDDS__SCOPE_EXIT_HPP_
   
   #include <utility>
   
   namespace rcpputils
   {
   
   template<typename CallableT>
   struct scope_exit final
   {
     explicit scope_exit(CallableT && callable)
     : callable_(std::forward<CallableT>(callable))
     {
     }
   
     scope_exit(const scope_exit &) = delete;
     scope_exit(scope_exit &&) = default;
   
     scope_exit & operator=(const scope_exit &) = delete;
     scope_exit & operator=(scope_exit &&) = default;
   
     ~scope_exit()
     {
       if (!cancelled_) {
         callable_();
       }
     }
   
     void cancel()
     {
       cancelled_ = true;
     }
   
   private:
     CallableT callable_;
     bool cancelled_{false};
   };
   
   template<typename CallableT>
   scope_exit<CallableT>
   make_scope_exit(CallableT && callable)
   {
     return scope_exit<CallableT>(std::forward<CallableT>(callable));
   }
   
   }  // namespace rcpputils
   
   #endif  // RMW_CONNEXTDDS__SCOPE_EXIT_HPP_