🚀 go-pugleaf

dcent wrote:
> Thanks again to all for the help. I have another question about that 
> nasty auto_ptr<> though. How can I pass what the auto_ptr is holding 
> into a function?
> 
> MyFile.h
> ---------
> private:
>   void _fastcall LoadList(TStringList *sl);    //or should it be 
> (TStringList &sl)
> 
> MyFile.cpp
> ---------
> _fastcall TForm::Button1Click() {
>    std::auto_ptr<TStringList> sl(new TStringList(this));
>    LoadList(sl);        //<-- throws an error
> }
> 
> The error is something like:
>    Cannot convert auto_ptr<TStringList> to TStringList *
> 
> Anyone got an idea?
> 
> Thanks dcent
> 

You can pass a reference, but it is only advisable when you KNOW that the 
pointer will not contain NULL.  As your class is guaranteed to contain a 
real object by the auto_ptr design you could probably get away with it. 
But if LoadList becomes a helper routine for other classes keep it as a 
pointer and check for NULL.

.h:
void __fastcall LoadList(TStringList & s1);

.cpp:
__fastcall TForm1::Button1Click(TObject *Sender) {
    std::auto_ptr<TStringList> s1(new TStringList);
    LoadList(*s1.get()); //Note the "*"
}