Archives: November 2009

SOLID Class Design: The Liskov Substitution Principle

— Category: Software Design

This is part three of a five part series about SOLID class design principles by Robert C. Martin. The SOLID principles focus on achieving code that is maintainable, robust, and reusable. In this post, I will discuss the Liskov Substitution Principle.

The Liskov Substitution Principle (LSP): functions that use pointers to base classes must be able to use objects of derived classes without knowing it.