Re: A STL template question

From:

"Igor Tandetnik" <itandetnik@mvps.org>

Newsgroups:

microsoft.public.vc.language

Date:

Thu, 28 May 2009 23:15:43 -0400

Message-ID:

<eD0HDvA4JHA.4272@TK2MSFTNGP06.phx.gbl>

"Lorry Astra" <LorryAstra@discussions.microsoft.com> wrote in message
news:0D525780-5CC0-49F3-B143-70CCCD3FC5CD@microsoft.com

when I compile this code, compiler tells me there are four errors:
C2143,C2059,
C2143,C2447.
I don't know where is wrong. I think the relationship between "class
A<T>" and "class A<T*>" is not existed

Yes, the two are related. The latter is a partial specialization of
the former.

but if I do not comment the
code of "class A<T>", everything is ok.

What gave you the idea that it's OK to comment out the definition of
A<T>?

I think I don't understand the relationship between "class A<T>" and
"class A<T*>"

Read about partial specialization in your favorite C++ textbook.

so I want to try to compile "class A<T*>" without the
definition of "class A<T>".

You won't be able to. It's not valid C++. You need to at least declare
A<T>:

template <typename T> class A;

Can I say: "class A<T>" and "class A<T*>" is like "int i" and "int*
i" ?

Well, you can say anything. The statement doesn't make any sense to me
though.
--
With best wishes,
Igor Tandetnik

With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925