lst-0075-book.cpp
// https://godbolt.org/z/4fK5WdoG8
template <std::copyable T>
class MyContainer {
T data_;
public:
void setData(const T& d);
T getData() const;
};
template <std::copyable T>
void MyContainer<T>::setData(const T& d) {
data_ = d;
}
template <std::copyable T>
T MyContainer<T>::getData() const {
return data_;
}