Category: OOD
Pimpl (Opaque Pointers)
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Summary Pimpl is used to hide implementation details for library consumers. It hides headers, data members, as well as private functions. Note that ~foo() has to be defined after foo::impl gets fulfilled. This is a requirement from unique_ptr: std::unique_ptr may be constructed for an incomplete type T, such as to facilitate the use as a handle in…
Generics in Java Compared to C++ Templates
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Summary In this post, I will introduce Generic in Java. The post may be useful when you are working with Java with prior knowledge of C++. Context The context is that I want to define an AbstractBaseClass which is a top-level abstract class but different subclasses require different types of arguments for some member functions….
Virtual Functions, Constructors, and Destructors
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Summary In this post, I will introduce rules related to constructors and destructors of classes which has virtual functions. Conclusions Golden Rule 1: Define a virtual destructor immediately Golden Rule 2: Do not invoke virtual functions from constructors or destructors Details In C++, Virtual functions allow for the choice of member function calls to be…
Class Template Definition and Declaration
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Summary In this post. I will introduce class templates in C++. Especially, how do we declare a template which generates classes and how do we write definitions in separate source files. I will also dive deeper to present how class templates are compiled. Conclusion As usual, I present the conclusions first.Say the customer will use…