Chapter 4 – Going Further with Classes and Records
This chapter builds on the object-oriented programming fundamentals introduced in Chapter 3, exploring advanced techniques for working with classes and records in Delphi XE2. It covers deeper class features, record structures, and class methods that give Delphi developers fine-grained control over data and behaviour.
Topics Covered
- Advanced class features and inheritance patterns
- Record structures: value-type semantics and when to use them
- Class methods, class properties, and class constructors
- Operator overloading for records
- Nested types and visibility
- Memory management considerations for classes versus records
Records in Delphi offer a lightweight, value-type alternative to classes. Unlike class instances, which are reference types allocated on the heap, records live on the stack and are copied on assignment. This chapter explains how to leverage records for performance-critical code and how to combine them with operator overloading for expressive, readable syntax.
Class methods and class properties are also examined in detail, showing how they differ from instance-level members and where they prove most useful — from factory patterns to shared state management.