Does anybody know why this compiles: template<typename T> class Foo; template<typename T> bool operator==(const T& l, const Foo<T>& r); template<typename T> class Foo { public: Foo(); ~Foo(); friend bool operator== <> (const T& l, const Foo<T>& r); bool operator==(const Foo<T>& r); }; But this does not (only difference is order of member vs friend operator==):… Read More Must a template friend operator overload precede a member function overload of the same operator?

I was writing a numpy-equivalent variable-dimension array in C++. I used a template class to store different kinds of datatypes in the array. Eventually, I had to write a code for the datatype converting. I would like to have the arrays to change their datatypes into another, so I wrote a constructor for the conversion.… Read More Is there a way to add a friend class that is itself but with different template arguments?

i cannot access private member of declared in class namespace::class Do you have any idea how to achieve that i was searching on the web and can’t find anything that solves my problem. #include <iostream> #include <algorithm> #include <vector> #include <functional> #include <string> #include <ctime> #include <iomanip> #include <memory.h> #define cahr char //anti-disleksija #define enld… Read More class inside namespace and global get and set of that class issue