Include What You Use wants a forward declaration of a type stored in an array in a template class wh...

Nlohmann::json& as function argument without including json.hpp in header...

"Attempting to use the forward class 'Game' as superclass of 'MathGame'" i...

forward declaration of std::ostream...

std::unique_ptr<incomplete_type> without custom deleter...

Forward declaration of inline functions...

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Forward declaration with unique_ptr...

How to access forward declaration in C++ class?...

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forward declaration of a struct in C?...

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When can I use a forward declaration?...

Forward declaring a specific template instance...

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In C++, do the header files of virtual function return types have to be included in the class declar...

Is it legal to use a different class-key in a declaration and the definition of a class-name?...

Forward declaration in namespace...

C++ another unique_ptr incomplete type question...

Forward declare a templated typedef...

Forward declaration of structure pattern...

Why doesn't this class forward declaration compile in C++?...

Forward declaring a template type parameter...

Using macros to define forward declarations...

How does forward declaration save compile time?...

forward declare swift enumeration in objective c...

Forward declare instantiated template class...

What are forward declarations in C++?...