The classic approach to grammar manipulation is based on instant processing of grammar edits, which limits the kinds of grammar evolution scenarios that can be expressed with it. Treating transformation preconditions as guards poses limitations on concurrent changes of the same grammar, on reuse of evolution scripts, on expressing optionally executed steps, on batch processing and optimization of them, etc. We propose an alternative paradigm of evolution, where a transformation can be scheduled for later execution based on its precondition. This kind of extreme evolution can be useful for expressing scenarios that are impossible to fully automate within the classic or the negotiated transformation paradigms.
Grammars and Other Rewriting Systems (acm F.4.2), Formal Languages (acm F.4.3)
Grammars and rewriting systems (msc 68Q42)
Software (theme 1)
J. de Lara , D. Di Ruscio (Davide) , A. Pierantonio (Alfonso)
GrammarLab: Foundations of a Grammar Laboratory
Extreme Modeling Workshop
This work was funded by the The Netherlands Organisation for Scientific Research (NWO); grant id nwo/612.001.007 - GrammarLab: Foundations of a Grammar Laboratory
Software Analysis and Transformation

Zaytsev, V. (2013). Pending Evolution of Grammars. In J de Lara, D Di Ruscio, & A Pierantonio (Eds.), Proceedings of Extreme Modeling Workshop 2013 (XM 0) (pp. 28–36).