C++ templates

[Mark Johnson]

I as far as I know, templates can't be split up into header and source
files... the template class and implementation must exist in one unit (i.e.
a header file).  This is required by the compiler.  I have never been able
to successfully split up a template class into two units.


-----Original Message-----
From: Benjamin Ellis [mailto:bmellis at uark.edu]
Sent: Thursday, November 16, 2000 4:14 PM
To: kdevelop at kdevelop.org
Subject: Re: C++ templates


> My Problem is that I'd like to implement a class-contructor, that takes
the
> generic types of my template as argument. When I'm defining the method
> within  the class declaration, everything works fine, but after spliting
the
> class code apart, into .cpp and .hpp the compiler nervs me, that the > > 
>constructor's arguments are not enough defined... Could anyone help me?

I'm not sure if this will answer your question or not... but say you have 
this class declaration:

----------------------------------------

template <class T> 
class MyClass
{
     MyClass(T);

     void SomeFunction();
};

-----------------------------------------

you would therefore, in a seperate file, declare the function definitions as

this:

------------------------------------------

template <class T>
MyClass<T>::MyClass(T genericDataType)
{
     //........
}

and ...

template <class T>
void MyClass<T>::SomeFunction()
{
     //........
}

--------------------------------------------

Remember, even if some of your class methods don't use the template type, 
they still have to be defined as a template function.

hope that helps.. make sure you pay attention to how the class methods are 
written in the .cpp file as shown above.

-Ben

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