Rationale for Ada 2005

John Barnes
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Chapter 2: Object oriented model

This chapter describes various important improvements to the object oriented model for Ada 2005.
First an alternative more traditional prefixed notation for calling operations has been introduced. A major improvement is that Java-like interfaces are introduced thereby permitting simple multiple inheritance; null procedures have also been introduced as a category of operation. Greater general flexibility is provided by allowing type extension at a more nested level than that of the parent.
There are also explicit features for overcoming nasty bugs which arise from confusion between overloading and overriding.

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© 2005, 2006, 2007 John Barnes Informatics.
Sponsored in part by:
The Ada Resource Association and its member companies: ARA Members AdaCore Polyspace Technologies Praxis Critical Systems IBM Rational Sofcheck and   Ada-Europe: