CODEWITHSUNDEEP
c++templates
lord.h
lord.h

Reputation: 163

passing any-type parameter to function in c++ using template

I want to pass any-type parameter to my function func1(). So here is my code: myclass.h :

public:
   myclass();
   template<typename T> void func1(T object);

myclass.cpp :

template<typename T> 
void myclass::func1(T object)
{
    return;
}

main.cpp :

int a=0;
myclass::func1<int>(a);

But I got this error :

error: cannot call member function 'void myclass::func1(T) [with T = int]' without object

Where is my mistake?

Upvotes: 1

Views: 4163

Answers (1)

k_kaz
k_kaz

Reputation: 606

You cannot simply separate declaration and definition in template functions. The simplest thing to do for a template function is to provide the code body in the function declaration in the header file.

If you want to call the function without a class object add static to the function signature.

header.hpp

#include <iostream>

class test_class{
public:
     template<typename T> static void member_function(T t){
        std::cout << "Argument: " << t << std::endl;
    }

};

main.cpp

#include <iostream>

#include "header.hpp"

int main(int argc, char ** argv){

    test_class::member_function(1);
    test_class::member_function("hello");
}

Upvotes: 5

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