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Generics with Delphi 2009 Win32

With, as a bonus, anonymous routines and routine references

Date de publication : November 13th, 2008

Par Sébastien Doeraene (sjrd.developpez.com)
 

We have been waiting for them for a while! Now they are here: generics in Delphi Win32. Those little awesome things are coming with Delphi 2009. This tutorial will help you understand and use them, and design your own generic classes.
idea fr Your comments, critics, suggestions, etc. are welcomed on the blog.
This is a translation of a tutorial initially written in French: fr Les génériques avec Delphi 2009 Win32. I have translated my own tutorial, but I am no perfect English speeker. I therefore apologize for all the mistakes I certainly did in this translation.

Juan Badell has also translated this tutorial into Spanish: Los genéricos en Delphi 2009 (HTTP mirror)

Aleksey Timohin has also made a translation into Russian.
This translation may be read in PDF form, which was built by Andrew Tishkin (HTTP mirror).


 
Introduction
I. Introduction
 I-A. Prerequisite
 I-B. What are generics?
 Daily usage
II. Daily usage: the example of TList<T>
 II-A. A simple code to start with
 II-B. Assignments between generic classes
 II-C. Methods of TList<T>
 II-D. TList<T> and comparers
 II-D-1. Writing a comparer using TComparer<T>
 II-D-2. Writing a comparer using a simple comparison function
 Design of a generic class
III. Design of a generic class
 III-A. Class declaration
 III-B. Implementing a method
 III-C. The pseudo-routine Default
 III-D. Routine references with tree walks
 III-D-1. Other methods using anonymous routines?
 III-E. And the rest
 III-F. How to use TTreeNode<T> ?
 Design of a generic record
IV. Design of a generic record
 More with generics: constraints, several parameters
V. Contraints on generic types
 V-A. What are the available constraints?
 V-B. But what is the purpose of it?
 V-C. A variant with constructor
 VI. Parameterizing with more than on type
 VII. Other generic types
 Generic methods
VIII. Generic methods
 VIII-A. A generic Min function
 VIII-B. Overloading and constraints
 VIII-C. Some extras for TList<T>
 RTTI and generics
IX. RTTI and generics
 IX-A. Changes to the pseudo-routine TypeInfo
 IX-A-1. A more general TypeInfo function
 IX-B. Do generic types have RTTI?
 Conclusion
X. Conclusion
 XI. Download the sources
 XII. Acknowlegments



 

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