[HACKERS] How to create shared_ptr for PGconn?

[Chengyu Fan]

Hi,
Does anyone know how to create the shared_ptr for PGconn? I always get compile 
errors ...
Below is my code:---const char * dbInfo = xxx;PGconn 
*conn = PGconnectdb(dbInfo);if (PGstatus(conn) != CONNECTION_OK) {std::cout 
 PQerrorMessage(conn)  std::endl;return 1;}
std::shared_ptrPGconn pConn(conn);---
Error messages for the code above:















main.cpp:153:27: note: in instantiation of function template specialization 
'std::__1::shared_ptrpg_conn::shared_ptrpg_conn, void' requested here
  std::shared_ptrPGconn pConn(rawConn);
/usr/local/Cellar/postgresql/9.4.1/include/libpq-fe.h:129:16: note: forward 
declaration of 'pg_conn'








typedef struct pg_conn PGconn;

Thanks,Chengyu

Re: [HACKERS] How to create shared_ptr for PGconn?

[Dmitry Igrishin]

2015-03-16 19:32 GMT+03:00 Chengyu Fan chengyu@hotmail.com:

 Hi,

 Does anyone know how to create the shared_ptr for PGconn? I always get
 compile errors ...

 Below is my code:
 ---
 const char * dbInfo = xxx;
 PGconn *conn = PGconnectdb(dbInfo);
 if (PGstatus(conn) != CONNECTION_OK) {
 std::cout  PQerrorMessage(conn)  std::endl;
 return 1;
 }

 std::shared_ptrPGconn pConn(conn);
 ---

 Error messages for the code above:

 *main.cpp:153:27: **note: *in instantiation of function template
 specialization 'std::__1::shared_ptrpg_conn::shared_ptrpg_conn, void'
 requested here

   std::shared_ptrPGconn pConn(rawConn);


 */usr/local/Cellar/postgresql/9.4.1/include/libpq-fe.h:129:16: note: *forward
 declaration of 'pg_conn'

 typedef struct pg_conn PGconn;

The complete example below:

#include memory

#include libpq-fe.h

int main(int argc, char *argv[])
{
  PGconn* cn = PQconnectdb();
  std::shared_ptrPGconn shared_cn(cn, PQfinish);

  return 0;
}



-- 
// Dmitry.