Pharo4: Plans and Dreams
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The document outlines the aspirations and planning for Pharo4, emphasizing the need for a manageable scope as Pharo3 is still in development. Key ideas include simplifying the structure of Pharo, integrating functionalities like slots and reflectivity, and enhancing modularity through features like a one-file Pharo and better control over images. The author highlights the importance of research and parallel developments, with the goal of annual releases.
Pharo4: Plans and Dreams
- 1. Pharo4 Plans and Dreams Marcus Denker http://rmod.lille.inria.fr
- 2. A bit early⊠⹠We are hard working to get Pharo3 out ⹠Not much yet happened with planning Pharo4
- 3. 1 Year
- 4. 9 Months March 2014-December 2014 +Time for Bug ïŹxing
- 5. This is not a lot!
- 6. So not too many dreamsâŠ
- 7. It needs to be doable
- 8. Ideas âą Slots âą ReïŹectivity âą One-File Pharo âą Tools âą GIT âą Athens âą Bootstrap âą Sista
- 9. Bootstrap âą Create an image from a git repository âą Control what the image contains âą Easier to make changes âą Enforces Modularity
- 10. Boostrap âą Working for Pharo3 as a prototype ! âą Can we even use this for Pharo4 on the build server?
- 11. One File Pharo âą .sources, .changes. .image ! âą It is time to simplify that!
- 12. Epicea âą Replace .changes âą High level model: âą aggregate changes (refactoring) âą serialized to disk independent of source model
- 14. Step2: Sources âą It is 2014: Memory is cheap. âą Complexity is expensive âą Why not just put the sources in the image? âą Just current version (compressed, of course) âą Code history is in Monticello (or Git)
- 15. Slots âą First class Instance Variables âą Already in Pharo3, but compatible (ivar Slot) âą For Pharo4: Provide different Slot kinds
- 16. Property Slots Object subclass: #PropertyObject layout: PointerLayout slots: { ïŹeld => Slot property1 => PropertySlot. property2 => PropertySlot. ... propertyN => PropertySlot. }
- 17. Others âą BitSlot âą BooleanSlot âą Alias âą Relationships (e.g. one-one, one-many) âą âŠ. Your Domain level Slot!
- 18. More in Paper from OOPSLA
- 19. ReïŹectivity âą Partial Behavioral ReïŹection âą Associate MetaObject with structural object âą e.g. Slots âą AST nodes
- 20. Method Can we modify the behaviour of code? Meta Link > Annotate the AST with meta-links
- 21. Why? âą Change behaviour for selected AST Nodes âą âAll assignmentsâ âą âthis message sendâ But without changing the program code!
- 22. © Marcus Denker Behavioral ReïŹection source code (AST) meta-object activation condition links
- 23. Uses⊠⹠Debugger âą BreakPoints, WatchPoints âą ProïŹlers âą Coverage Analysis âą AOP
- 24. ⊠And Beyond ⹠Every year one Release ⹠Research happens in Parallel ⹠Lots of Interesting Stuff ⹠Sadly another talk
- 25. Questions ?