Is it possible to friend a class in an unnamed namespace in C++?...

How to friend a function template inside a class template?...

Template friend function of two typenames for a template class...

How do I make this templated class be a friend of another class?...

Is there any way to access private fields of a struct from another package?...

How to make google-test classes friends with my classes?...

Can a name introduced via using-directive or using-declaration be used as elaborated-type-specifier ...

friend function template with default template argument...

What's the scope of inline friend functions?...

Are inner classes in C++ automatically friends?...

PHP equivalent of friend or internal...

Redeclaration of explicitly defaulted comparison operator makes it undefined...

friend can't access private members using namespace...

What is wrong with making a unit test a friend of the class it is testing?...

friend class with limited access...

Template Friend Function of a Template Class (Friend with More Parameters)...

class friend function inside a namespace...

clean C++ granular friend equivalent? (Answer: Attorney-Client Idiom)...

Friend function template with non type paramer in outer namespace doesn't friend...

How to declare a class template as friend of other template class...

Declaring main as friend considered harmful?...

why explicit specialization of a friend function is allowed?...

friend in operator == or << when should i use it?...

Must a template friend operator overload precede a member function overload of the same operator?...

clang bug? Ambiguous function call compilation errors, yet there is no amiguity present...

Why is a type alias not allowed to be a friend class name in C++?...

friend declaration in C++...

Is there a way to add a friend class that is itself but with different template arguments?...

Nested not templated class inside a template class C++...

Why do I have `-Wunsupported-friend` warning when I compile friend function template?...