CP4确实是经典，但是它却不适合初学者，因为这本书是站在编译器的角度来写的，很多东西非常细节，事无巨细的论述对初学者一点好处也没有。-CP4 is indeed a classic, but it is not suitable for beginners, this book is standing on the point of view of the compiler to write a lot of things very detail, a micromanager exposition there is no good for beginners.