This paper describes an Ei el system for rapid testing of grammars. Grammars are de ned in an extended BNF notation that allows actions on the parse tree nodes to be de ned as add...
Using an object-oriented approach, the text editor Write has been designed to be extensible while its basic structure has been kept small and simple. As its main extension concept...
We show how an object-oriented system-and in particular the Oberon System-can be used to write software that is extensible by end users even while the software is running. Extensib...
The notion of location of part objects is introduced, yielding a reference to the containing object. Combined with locally defined objects and classes (block structure), singularl...