U++ forum: Welcome to the forum

Re: Link error when using polymorphism [message #15693 is a reply to message #15691]

Sun, 04 May 2008 20:33

bytefield
Messages: 210
Registered: December 2007

Experienced Member

Well, there are some problems.
You forgot to implement some functions


bool DBConnector::Disconnect()
{
}

bool DBConnector::Connect(String db)
{
}

int DBConnector::SQLExecDML(const String &request)
{
}

cResultSet DBConnector::SQLExecQuery(const String &request)
{
}

if you put these functions in DBConnector.cpp all thing goes normally, and program compiles without errors.

I've commented out

//#include <Toolkit/Tools.h>
//using namespace VirtualSofts::Tools;

in every file, because you didn't provided that package, and also included in your project Core package if you want to use u++ Strings.

The program compiles well, but there are memory leaks and guess that is because you mix Ultimate++ code (String which is moveable and implement pick concept) with std containers which use deep copy concept. So you should use U++ containers or use std::string with std containers instead of Upp::String with std containers.

As suggestion: never mix Ultimate++ with STL and use case sensitive package name, because it matter on Linux platform.
( you provided MySQLconnector instead of MySQLConnector)
P.S.: SQL is implemented in Ultimate++ so you may use it if you need.

Edit: it didn't implement a polymorphic type.

Andrei

Attachment: SQLTest.zip
(Size: 4.60KB, Downloaded 290 times)

cdabbd745f1234c2751ee1f932d1dd75

[Updated on: Sun, 04 May 2008 20:36]

Report message to a moderator