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[QUOTE="little.freaky, post: 2587078"]
Hello group,

I have a problem with template classes and inheritance. I've searched
on the internet to find a solution but all the examples look the same
as my code (as far as I can tell) and I can't find my mistake (maybe
there's something wrong with my eyes).

I've two classes:

template< class T >
class ITestTemplateA
{
public:
   ITestTemplateA() { };
   virtual ~ITestTemplateA() { };

};

template< class T >
class TestTemplateB : public ITestTemplateA< T >
{
public:
	TestTemplateB();
	virtual ~TestTemplateB();

};

and the implementation of TestTemplateB:

template < class T>
TestTemplateB<T>::TestTemplateB()
{

}

template< class T >
TestTemplateB<T>::~TestTemplateB()
{

}

Now I want to instantiate an object of type TestTemplateB:

TestTemplateB<ITrack>* track = new TestTemplateB<ITrack>();

Where ITrack is another class, but I think that the source-code to that
class isn't important (?). This compiles but the linker shows an error:

error LNK2001: unresolved external symbol "public: __thiscall
TestTemplateB<class ITrack>::TestTemplateB<class ITrack>(void)"
(??0?$TestTemplateB@VITrack@@@@QAE@XZ)

Can somebody tell my what I'm doing wrong?

thanks in advance
Michael Doswald
[/QUOTE]

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