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I am trying to figure out if this will work. I have a template base
class that I want to be able to inherit from, the classes that will
need to inherit from this also need to be tamplates. Is this possible
or do i need to think of another way to do it?

jarr...@gmail.com wrote:
> I am trying to figure out if this will work. I have a template base
> class that I want to be able to inherit from, the classes that will
> need to inherit from this also need to be tamplates. Is this possible
> or do i need to think of another way to do it?

template<typename X>
class C1
{
};

template<typename Y>
class C2 : public C1<Y>
{
Y var;
};

is but one way of doing it, meeting a particular set of needs.

Hmm I tried that and I get an error saying that C2 is not a template
name

correction not a template type

wrote:
> I am trying to figure out if this will work. I have a template base
> class

Actually, it sounds like you have a class template you want to use as
a base for something.

> that I want to be able to inherit from, the classes that will
> need to inherit from this also need to be tamplates. Is this possible
> or do i need to think of another way to do it?

You need to get one thing straight: you can inherit only from a class.
You cannot inherit from a template. Even when you define another class
template like so:

template<class T> class Derived : public Base<T> { ...

at the time of instantiating the 'Derived' class with a particular 'T',
say, 'Blah', it will *inherit* from a "normal" *class* (in that case
'Base<Blah>'). IOW, no inheriting from templates exists in C++. In
order to make 'Derived' a normal class (and not a template), you _have_
to derive it from an instantiation of the 'Base' template, like so

class SomeDerived : public Base<Foo> { ...

Please ask more specific questions if something's still unclear.

V
--
Please remove capital As from my address when replying by mail

wrote:
> Hmm I tried that and I get an error saying that C2 is not a template
> name

You'll need to provide more information and quote better in order for
me to be able to help you.

template <class T>
class C1{
virtual void output();
}

template <class T>
class C2: public C1<T>
{
virtual void output();
}

I have other functions and such in the classes but that is the basic
setup of how I am trying to inherit, but as Victor said I may not be
able to inherit this way.

Ok so I took out all the inheritance parts and now have two template
classes
template <class T>
class C1
{
virtual void output();

}

template <class T>
class C2
{
virtual void output();

}

How ever I am still getting the error about C2 not being a tamplate
type. I am starting to think that my error may be somewhere else.

Ok so I took out all the inheritance parts and now have two template
classes
template <class T>
class C1
{
void output();

}

template <class T>
class C2
{
void output();

}

How ever I am still getting the error about C2 not being a tamplate
type. I am starting to think that my error may be somewhere else.

On 9 May 2006 16:08:35 -0700, "Jarrad" <> wrote:

>Ok so I took out all the inheritance parts and now have two template
>classes
>template <class T>
>class C1
>{
>void output();
>
>}
>
>template <class T>
>class C2
>{
>void output();
>
>}
>
>How ever I am still getting the error about C2 not being a tamplate
>type. I am starting to think that my error may be somewhere else.

You are typing semicolins after those class definitions, yes?