using auto_ptr (only)

[ALM]

I use the auto_ptr template class in my code in several places. I'd like to use it without the std:: qualifier so I have two choices: 1, bring in the whole std namespace with the using directive; or 2, bring in just the auto_ptr class with the using declaration.

My question is, what's the proper way to do the second option? I've tried doing this:


#include <memory>
using std::auto_ptr<class T>;



This compiles fine but then when I say:

auto_ptr<CFile> pFile;



the compiler tells me: 'auto_ptr' : undeclared identifier.

What am I doing wrong?

Thanks,
Alvaro

I'd like to know the answer too!

A using declaration brings in a name. It doesn't matter if the type is incomplete, or if the name is even a type.

You want:

#include <memory>
using std::auto_ptr;
auto_ptr<CWnd> pToWindow; // works



Later,
Chris Tracy
crtracy@uiuc.edu

[ALM]

Hi Chris,

I tried it but the compiler complained on the using line saying:

error C2955: 'auto_ptr' : use of class template requires template argument list

Thanks for your response,
Alvaro

[James Curran]

I hadn't seen that problem since VC5, so I suspect that the "correct" answer is to upgrade to VC6sp3.

Until then, I believe either:

using std::auto_ptr<CFile>
or
using namespace std;

should work.


Truth,
James
http://www.NJTheater.com
http://www.NJTheater.com/JamesCurran