#include <cstddef>
template <typename T, std::size_t MaxElements>
struct circular_buffer{};
template <typename circular_buffer>
bool operator==(const circular_buffer &a, const circular_buffer &b) {
return true;
}
int main() {
circular_buffer<int, 2> a;
circular_buffer<int, 3> b;
a == b;
return 0;
}
This code is work only for 2==3. But my 2 != my 3. Help me to repair operator.
Following might work for you:
template <typename T, std::size_t M1, std::size_t M2>
bool operator==(circular_buffer<T, M1> const & a, circular_buffer<T, M2> const & b) {
// some meaningful logic
return true;
};
Problem you have is that a and b are of different types, i.e. those two objects have different MaxElements template parameter. Thus, you need to provide operator == overload that will handle this case.
circular_buffershouldn't be a template parameter to your operator. That operator is worthless as is. Beyond that, do you understand that by specifying two different sizes you actually have two different end concrete types? One iscircular_buffer<int,2>, the other iscircular_buffer<int,3>. They're not the same type. What is it you hope to achieve with youroperator ==when that happens (or for that matter, in general)?template <typename circular_buffer>name is arbitrary, and currently just hide (for the function) the template class with the same name. So it is misleading.