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problem with c++ union as argument:

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Hi, the following code failed to compile on Create

error: no matching function for call to 'ccmqmsgque::MqMsgqueCallbackC::MqMsgqueCallbackC(const 
ccmqmsgque::MqMsgqueCallbackC::MqMsgqueCallbackU&)'

namespace ccmqmsgque {
   struct MqMsgqueCallbackC {
     enum MqMsgqueCallbackE  {
       PC_CallbackF,
       PC_StaticCallbackF,
       PC_IService,
       PC_IEvent,
       PC_IServerSetup,
       PC_IServerCleanup,
       PC_IBgError
     } type;

     union MqMsgqueCallbackU {
       MqContextC::CallbackF         Callback;
       MqContextC::StaticCallbackF   StaticCallback;
       IService *                    Service;
       IEvent *                      Event;
       IServerSetup *                ServerSetup;
       IServerCleanup *              ServerCleanup;
       IBgError *                    BgError;
     } call;

     public:
       MqMsgqueCallbackC(MqContextC::CallbackF const callback);
       MqMsgqueCallbackC(MqContextC::StaticCallbackF const callback);
       MqMsgqueCallbackC(IService * const service);

       MqMsgqueCallbackC(IEvent * const event);
       MqMsgqueCallbackC(IServerSetup * const serverSetup);
       MqMsgqueCallbackC(IServerCleanup * const serverCleanup);
       MqMsgqueCallbackC(IBgError * const bgError);

       MqMsgqueCallbackC(MQ_CTX const context, MqMsgqueCallbackC* const copy);

       static MK_CBP Create(const union MqMsgqueCallbackU& callback) {
         return (MK_CBP) new MqMsgqueCallbackC(callback);
       }

       static enum MkErrorE  Call ( MQ_CALLBACK_SERVICE_CALL_ARGS );
       static void           Free ( MQ_RT_ARGS MQ_CTX const context, MK_PTR *dataP);
       static void           Copy ( MQ_RT_ARGS MQ_CTX const context, MK_PTR *dataP);
   };
};


Problem

1. I have a union with all possible argument-types and a CTOR for each type
2. Now I want to have a static "Create" function to call the CTOR for each type
3. I know I could write !! 7 !! "Create", just one for every type BUT I want to
    use the union

Question, how I do it?


mfg
AO

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Thread

problem with c++ union as argument: aotto1968 <aotto1968@t-online.de> - 2022-11-13 09:56 +0100
  Re: problem with c++ union as argument: Bonita Montero <Bonita.Montero@gmail.com> - 2022-11-13 11:05 +0100
  Re: problem with c++ union as argument: Marcel Mueller <news.5.maazl@spamgourmet.org> - 2022-11-13 12:48 +0100
    Re: problem with c++ union as argument: Michael S <already5chosen@yahoo.com> - 2022-11-13 04:44 -0800
    Re: problem with c++ union as argument: Bonita Montero <Bonita.Montero@gmail.com> - 2022-11-13 19:52 +0100
  Re: problem with c++ union as argument: Michael S <already5chosen@yahoo.com> - 2022-11-13 04:28 -0800
  Re: problem with c++ union as argument: Andrey Tarasevich <andreytarasevich@hotmail.com> - 2022-11-13 11:39 -0800
  Re: problem with c++ union as argument: Juha Nieminen <nospam@thanks.invalid> - 2022-11-16 09:36 +0000
  Re: problem with c++ union as argument: Jorgen Grahn <grahn+nntp@snipabacken.se> - 2022-11-19 22:42 +0000

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