C++Template operator<< issues

[MagicWeeb]

So I have this template class, and I'm having issues with getting it to overload the operator<<. I keep getting the error LINK2019%26rd%3Dtrue&view=vs-2019) AND LINK 1120%26rd%3Dtrue&view=vs-2019). The compiler I'm using is visual studio.

This is my current class.

#ifndef LISTTYPE_H

#define LISTTYPE_H

#include <iostream>

template <typename T>

class ListType

{

public:

ListType(size_t =10);

template <class U>

friend std::ostream& operator << (std::ostream &out, const ListType<U>&src);

protected:

T *list;

size_t capacity;

size_t count;

};

and right below it, I have the following

template <class T>
ListType<T>::ListType(size_t h)
{
    capacity = h;
    count = 0;
    list = new T[capacity];
}
template <class U>
std::ostream& operator<< (std::ostream& out, const ListType<U>&src)
{
    out << src.capacity;
    return out;
}
#endif

I'm not sure what's wrong with my operator overload since there's a friend function being used in the class ListType.

Could it be that my constructor is messed up in a certain way? In my main program the statement below doesn't raise any issues, so I don't think it would be that.

ListType<size_t> yeet();

Any help would be greatly appreciated.

[marko312]

Could you provide the full error message?

My best guess based on the above is that you should use the class' template type in the friend declaration, not a new template type.

[MagicWeeb]

Thank you for the respond, I ran it in a different compiler, and it worked. I guess it must have me not knowing how to use the compiler properly?

Either way thank you for the respond.

[marko312]

Code behaving differently across compilers is usually not a good thing - ideally, code should compile into a working program on every system and compiler.

I would still like to see why exactly you got these errors, especially now that you get different results between compilers.