G ++ error: Expected ') 'before' * 'token

Originally, the type before "*" is defined by typedef, and "mytype * const P" is used;

 

This error occurs because the compiler does not know what mytype is. This is what I encountered in C ++ multi-inheritance. Mytype is the type defined in the public in the base class. The new type is not recognized in its grandson class. However, the mytype type also exists in the son class, but no error is reported.

 

In the sun tzu class, just repeat the mytype under typedef based on the base class, And the compiler can recognize the secondary type.

 

Reference:

Http://stackoverflow.com/questions/3720034/error-expected-before-token

G ++ error: Expected ') 'before' * 'token