Grammar rework

[AlexanderKnueppel]

The grammar (+ checker and translator) are currently incomplete for the inteded task.

Main issue:

• Keyword \old(...) does currently not exist (but is needed).

Other issues:

• ...may arise when corresponding examples are constructed and show the current limitations of the grammar in place. The grammar is checked in class edu.kit.archicorc2.idl\src\edu\kit\archicorc2\idl\validation\CidlValidator.xtend

Envisioned solution:

Revise grammar + checker and translator. There exists a dedicated grammar package in ArchiCorC:

The .g4 file contains the antlr grammar. antlr is needed to generate the employed java code (currently, the visitor pattern is applied). There exists a shell script in the package with the right instructions: