Resolving a Forward Declaration Issue Involving a State Machine in C++...

How to declare a zeromq socket in a cpp class...

Fixing circular dependencies c++17 headers...

Can I omit non-public inheritance for forward-declaration of classes?...

C++ forward declarations with multiple classes, derived class...

Template method accesses forward declared class fails to compile only without this pointer...

Breaking cyclic references more elegant in C++...

Which STL data structures with an incomplete type stored can be used as a class member?...

How can I avoid including a class stored as a field in a data structure?...

Guaranteed copy elision and forward declaration of returned type...

Substitute the forward declared struct with lately defined struct...

Hiding a C++ class in a header without using the unnamed namespace...

In C++, is it possible to forward declare a class as inheriting from another class?...

C++11 Enum forward causes "underlying type mismatch"...

How do I reference a static data in C that appears after the function that needs it?...

How to solve this forward class declaration problem?...

Co-Dependent .h files with forward declaration...

How to inherit from a class that has been declared forwardly...

Clang error: member access into incomplete type...

Is the function my_func exposed to the linker or not for this example?...

C++ Bi-directional class association (Using forward declaration)...

What does it mean to have a struct without a definition?...

Forward declaration error when migrating code from openssl 1.0.1 to 1.1.0...

Using a class as template parameter in its own decleration...

How do I forward declare a template type that has been forward declared elsewhere with a defaulting...

android forward declarations not working in 1.6...

Smart Pointers, Forward Declaration, and C4150...

Forward declaring class with templated code...

Forward Declaration?, Include guard?, or something else?...

C++ Forward declaration before class or before member in the Pimple idiom?...