Abstract

This paper explains how higher-order hierarchies can be used to handle the expression problem. The expression data type. A typical object-oriented design supports extending the set of data structures, and a typical functional design supports extending the set of operations, but it is hard to support both in a smooth manner. Higherorder hierarchies is a feature of the highly unified, mixin-based, extension-oriented kind of inheritance which is available in the language gbeta, which is itself a language that was created by generalizing the language Beta.

Citations