From Stairway to Heaven onto the Highway to Hell with Xtext

1. KarstenThoms

2. EASY TO LEARN FLEXIBLE GOOD DOCS HIDES COMPLEXITY USES XTEND GOOD SUPPORTFAST PROTOTYPING GOOD DEFAULTS MATURE SOURCE QUALITY

3. FLEXIBILITY Who says you can’t play golf with apples? https://pixabay.com/de/apple-natur-green-garten-947674/

4. DESIGN SMELLS

5. GRAMMAR • Assign ‚name=ID‘ attribute for non-referable elements • Tweaking grammar to optimize non syntax related stuff • generated meta model structure • content assist (e.g. whitespace in combined keywords) • scoping DESIGN SMELLS

6. GRAMMAR • Too few / too much keywords • Trying to solve too much with terminal rules • Unordered groups for multivalued assignments • Using Xcore for small metamodels • Enable backtracking to „solve“ a grammar ambiguity issues DESIGN SMELLS

7. GRAMMAR • Too few / too much keywords • Trying to solve too much with terminal rules • Unordered groups for multivalued assignments • Using Xcore for small metamodels • Enable backtracking to „solve“ a grammar ambiguity issues DESIGN SMELLS

8. GRAMMAR • Too few / too much keywords • Trying to solve too much with terminal rules • Unordered groups for multivalued assignments • Using Xcore for small metamodels • Enable backtracking to „solve“ grammar ambiguity issues DESIGN SMELLS

9. AMBIGUITY

10. SCOPING • Use declarative scope provider • Navigate cross-references while computing scope • Compute stuff in scope provider which could be put into IEObjectDescription’s user data • „Optimize“ scope to tweak content assist • Check for proxies, resolve proxies • Instantiate unnecessary objects • Access node model and assume that it is complete DESIGN SMELLS

11. VALIDATION • Don’t use semantic validation at all • Use @Check without CheckType   => Default is CheckType.FAST • Provide check methods for child-elements which traverse sibling elements (e.g. uniqueness check) • Many ﬁne grained check methods • Loading the world again DESIGN SMELLS

12. COMPLEXITY

13. IDENTIFYINGTHE RIGHT PLACETO FIX AN ISSUE https://pixabay.com/de/nadel-im-heuhaufen-nadel-heuhaufen-1752846/

14. https://pixabay.com/de/yoda-dunkel-die-dunkle-seite-des-1726764/ Use the Source, Luke!

16. Dependency Injection

17. CUSTOMIZING http://de.freeimages.com/photo/chef-s-swiss-knife-1239195 UNEXPECTED

18. OVER ENGINEERING

19. DSL OVERLOAD Entity DSL Conﬁg DSL Frontend DSL Rule DSL Style DSL Behavior DSL Requirements DSL Cool DSL Yet Another DSL Personal Favorite DSL MyDSL Database DSL Sample DSL The Only Right DSL

20. EXPRESSIONS

21. DSL != NATURAL LANGUAGE

22. NON-TECHIE USERS

23. SCALABILITY http://de.freeimages.com/photo/constructing-tower-1207408

24. CODE WASTE

25. PROTOTYPES

26. TESTING

27. STICK WITH OLD RELEASES

28. ADVICE RESISTANCE

29. WRONG TOOL

30. PROBLEM SOLUTION

31. • Evaluate if Xtext is the right tool to solve a problem [ it often is :-) ] • Get experts on board when starting ambitious projects • Learn underlying technologies (EMF, ANTLR, …) • Continuously develop DSL projects • Write extensive tests • Invest into user experience AVOIDING TROUBLE

32. KEEP INFORMED itemis.com / Blogs / Xtext @kthoms @holgerschill @itemis @chrdietrich @franzbecker_io

From Stairway to Heaven onto the Highway to Hell with Xtext

From Stairway to Heaven onto the Highway to Hell with Xtext

Recomendados

Mais conteúdo relacionado

Mais procurados

Mais procurados(15)

Destaque

Destaque(20)

Similar a From Stairway to Heaven onto the Highway to Hell with Xtext

Similar a From Stairway to Heaven onto the Highway to Hell with Xtext(20)

Mais de Karsten Thoms

Mais de Karsten Thoms(6)

Último

Último(20)

From Stairway to Heaven onto the Highway to Hell with Xtext