.. _program_listing_file_include_rclcpp_scope_exit.hpp:

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

|exhale_lsh| :ref:`Return to documentation for file <file_include_rclcpp_scope_exit.hpp>` (``include/rclcpp/scope_exit.hpp``)

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

.. code-block:: cpp

   // Copyright 2015 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.
   
   // Based on: http://the-witness.net/news/2012/11/scopeexit-in-c11/
   // But I changed the lambda to include by reference rather than value, see:
   // http://the-witness.net/news/2012/11/scopeexit-in-c11/comment-page-1/#comment-86873
   
   #ifndef RCLCPP__SCOPE_EXIT_HPP_
   #define RCLCPP__SCOPE_EXIT_HPP_
   
   // TODO(christophebedard) remove this header completely in I-turtle
   
   #warning rclcpp/scope_exit.hpp has been deprecated, please use rcpputils/scope_exit.hpp instead
   
   #include <functional>
   
   #include "rclcpp/macros.hpp"
   
   namespace rclcpp
   {
   
   template<typename Callable>
   struct ScopeExit
   {
     explicit ScopeExit(Callable callable)
     : callable_(callable) {}
     ~ScopeExit() {callable_();}
   
   private:
     Callable callable_;
   };
   
   template<typename Callable>
   ScopeExit<Callable>
   make_scope_exit(Callable callable)
   {
     return ScopeExit<Callable>(callable);
   }
   
   }  // namespace rclcpp
   
   #define RCLCPP_SCOPE_EXIT(code) \
     auto RCLCPP_STRING_JOIN(scope_exit_, __LINE__) = rclcpp::make_scope_exit([&]() {code;})
   
   #endif  // RCLCPP__SCOPE_EXIT_HPP_