We use PIMPL idiom in order to emulate aspect oriented programming where pre, post and error aspects are called before and after the execution of a member function.
struct Omg{
void purr(){ cout<< "purr\n"; }
};
struct Lol{
Omg* omg;
/*...*/
void purr(){ try{ pre(); omg-> purr(); post(); }catch(...){ error(); } }
};
We also use pointer to base class to share different aspects between many classes.
The drawback of this approach is that the library user has to take into account all the aspects that are going to be executed, but only sees his class. It requires browsing the documentation for any side-effects.
