text: /*
      BSD 3-Clause License
      
      Copyright (c) 2021, SudoCpp
      All rights reserved.
  
      Redistribution and use in source and binary forms, with or without
      modification, are permitted provided that the following conditions are met:
  
      1. Redistributions of source code must retain the above copyright notice, this
      list of conditions and the following disclaimer.
  
      2. Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
  
      3. Neither the name of the copyright holder nor the names of its
      contributors may be used to endorse or promote products derived from
      this software without specific prior written permission.
  
      THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
      AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
      DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
      FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
      SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
      CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
      OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
  
  #ifndef SIMPLEX_SUPPORTSSIGNALS_HPP
  #define SIMPLEX_SUPPORTSSIGNALS_HPP
  
  #include <vector>
  
  //Same as public within project, but if combined header used, it sets to private
  #ifdef SIMPLEX_TOOLKIT_INTERNAL
  #define _internal private
  #else
  #define _internal public
  #endif
  
  namespace simplex
  {
      //template<typename ...Args> class Signal;
      
      class SupportsSignals
      {
          //template<typename ... Args>
          //friend class Signal;
  
          //Signals that call this slot object
          std::vector<SupportsSignals*> linkedSignalObjects; //Class with Slots uses this
          //Valid slot objects that signal can call
          std::vector<SupportsSignals*> linkedSlotObjects; //Used by Signal
  
          bool vecContains(const std::vector<SupportsSignals*>& vec, SupportsSignals* value);
          void vecRemove(std::vector<SupportsSignals*>& vec, SupportsSignals* value);
          
          public:
          SupportsSignals();
          virtual ~SupportsSignals();
  
          //Called by signal, so slot can tell it when slot is destructing
          void addSignal(SupportsSignals* signalObj);
          //Called by signal , so slot knows it doesn't need to alert signal
          void removeSignal(SupportsSignals* signalObj);
  
          //Called by slot, so that it isn't called anymore
          void removeSlot(SupportsSignals* slotObj);
  
          protected:
          //Signal calls this so it knows what slots are valid
          void addSlot(SupportsSignals* slotObj);
  
          //Signal calls this to check if slot is still valid.
          bool slotInstanceStillExists(SupportsSignals* slotObj);
  
          operator SupportsSignals*();
      };
  }
  
  #endif //SIMPLEX_SUPPORTSSIGNALS_HPP