Thread: Instantiating a template class

Heeeelllooo... !


Okay, I have this pretty weird problem, or so I think

I have a CDLDAList Class, its declaration is:

Code:

template <class Type> class CDLDAList
{
private:
    /**
     * @brief Friend class declaration for CDLIterator
     */
    template <class Type> friend class CDLIterator;
//..... declaration of private stuff
public:

    /**
     * @brief    Default constructor
     * @pre        true
     * @post    Empty list constructed
     */
    CDLDAList<Type>();
//.... rest of public thingies
}

and its constructor is defined as follows:

Code:

template <class Type> CDLDAList<Type>::CDLDAList<Type>()
{
    nMaxIterators=100;
    nIterators=0;
    pHead=NULL;
    pTail=NULL;
    pIterators=new CDLIterator<Type>[nDeltaIterators];
    nItems=0;
}

now I have another class which has an attribute of type CDLDAList<int>, like this:

Code:

class CFacade
{
private:
    /**
     * @brief    List of Integers
     */
    CDLDAList<int> lList;
//rest of class declaration
}

Now, trying to compile this, with two different compilers, gives different errors

With Visual Studio .NET 2003 it gives me linker errors saying none of CDLDAList<int>'s member functions I'm using could be found by the linker

Something among this line

Originally Posted by Visual Studio

TallerListas1_09 error LNK2019: unresolved external symbol "public: __thiscall CDLDAList<int>::~CDLDAList<int>(void)" (??1?$CDLDAList@H@@QAE@XZ) referenced in function "public: __thiscall CFacade::~CFacade(void)" (??1CFacade@@QAE@XZ)

TallerListas1_09 error LNK2019: unresolved external symbol "public: bool __thiscall CDLDAList<int>::eraseItem(class CDLIterator<int>)" (?eraseItem@?$CDLDAList@H@@QAE_NV?$CDLIterator@H@@ @Z) referenced in function "public: enum Result __thiscall CFacade::srvEraseItem(class CDLIterator<int>)" (?srvEraseItem@CFacade@@QAE?AW4Result@@V?$CDLItera tor@H@@@Z)

and so on

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

Borland C++Builder 6.0 "stands" where I will make the text bold:

template <class Type> CDLDAList<Type>::CDLDAList<Type>()
{
//constructor code here
}

saying

Originally Posted by Borland

[C++ Error] DLDAList.cpp(14): E2040 Declaration terminated incorrectly

Now, if I change it so it says template <class Type> CDLDAList<Type>::CDLDAList() instead, it will give me a linker error, just like MSVS.NET's, saying there's an unresolved external ( CDLDAList<int>::CDLDAList<int>() )

I dunno if I'm not following proper syntax or what, but I'm pretty confused about what to do and I think I'm doing it how it's supposed to be done... I dunno


Miguel Andrés