On Saturday, September 29, 2012 9:49:54 AM UTC+5:30, ArbolOne wrote:
> namespace jme {
>
> template <class T> class Data {
>
> private:
>
> T data;
>
> int id;
>
> public:
>
> Data();
>
> Data(T, const int);
>
> virtual ~Data();
>
> Data(const Data& other);
>
> Data& operator=(const Data& other);
>
> const int getId();
>
> const T& getData() {
>
> return data;
>
> }
>
> };
>
>
>
> template <class T>
>
> jme::Data<T>::Data() {}
>
>
>
> template <class T>
>
> jme::Data<T>::Data(T _data, const int _id) {
>
> this->data = _data;
>
> this->id = _id;
>
> }
>
> template <class T>
>
> jme::Data<T>::~Data() {}
>
>
>
> template <class T>
>
> jme::Data<T>::Data(const Data& other) {
>
> //copy ctor
>
> }
>
> template <class T>
>
> jme::Data<T>&
>
> jme::Data<T>::operator=(const Data& rhs) {
>
> //if (this == &rhs) return *this; // handle self assignment
>
> //assignment operator
>
> this->T = rhs.T;
>
> //this->id = rhs.id;
>
> return *this;
>
> }
>
> template <class T>
>
> const int jme::Data<T>::getId() {
>
> return id;
>
> }
>
> ---
>
> int main(){
>
> jme::Data d;
>
> std::cout << "Hello world!" << std::endl;
>
> return 0;
>
> }
>
>
>
> The above program gives me this error message:
>
>
>
> -------------- Build: Debug in data ---------------
>
>
>
> Linking console executable: bin\Debug\list.exe
>
> obj\Debug\main.o: In function `main':
>
> C:/.../main.cpp:8: undefined reference to `jme::Data<std::string>::Data()'
>
>
>
> C:/.../main.cpp:10: undefined reference to `jme::Data<std::string>::~Data()'
>
>
>
> C:/.../main.cpp:10: undefined reference to `jme::Data<std::string>::~Data()'
>
>
>
> collect2: ld returned 1 exit status
>
> Process terminated with status 1 (0 minutes, 0 seconds)
>
> 3 errors, 0 warnings
>
>
>
>
>
>
>
> What am I doing wrong?
HTH--
I tried compiling the same at my machine, using Fedora Linux 17, gcc 4.7 , got
this error:
test.cpp:47:15: error: missing template arguments before ‘d’
test.cpp:47:15: error: expected ‘;’ before ‘d’
test.cpp:48:5: error: ‘cout’ is not a member of ‘std’
test.cpp:48:36: error: ‘endl’ is not a member of ‘std’
test.cpp: At global scope:
test.cpp:50:1: error: expected ‘}’ at end of input
Changing : jme::Data <int> d; and including <iostream> makes it work !!
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