cpp template class constructor in cpp file [duplicate]

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• Why can templates only be implemented in the header file? 11 answers

I have this template class where I want to isolate member function definition from header to cpp file. class has more member function but not listed here for simplicity. Just a constructor is included here.

template<uint32_t bind_type>
class bind_pdu: public pdu {
public:
bind_pdu();
};

cpp file for constructor definition is used as

template<uint32_t bind_type>
bind_pdu<bind_type>::bind_pdu():pdu(bind_type){
}

I am using c++11 using command to declare a new type like

using bind_another_type = bind_pdu<111>

and using this type to use default constructor as

bind_another_type mybind;

error I am getting at this line of code is

undefined reference to `smpp::pdu::bind_pdu<2u>::bind_pdu()

template works perfectly if I put member functions in header files. but with cpp file it doesn't behave as I expect it to. I am using gcc 4.8 with c++11 option enable.

any help will be appreciated

Regards