Faré writes: >> Rationale for registering a new system is as follows: preloaded-systems >> and immutable-systems are separate kind of system treated differently in >> the code and have a separate class, because of their very nature. >> > I don't buy that. Immutable systems could be made thus by adding a > slot immutable-p to all systems. The reason we're using a table > instead is because we want fast access to the list of only those > systems that are immutable without groveling a large list of all the > defined systems, that most usually aren't. At which point we don't > need the slot.
I believe it would be improvement upon current design (explicit consulting with separate hash tables, special cases in the code, calling something a xxx-system while it's in fact xxx-flagged-system). I'm not insisting on that change, since the issue which made me work on that is (mostly, if not entirely) solved. Either way I think that at least removing immutability flag from the system should be abstracted by a protocol (i.e `deregister-immutable-system' or something of this kind) instead of calling remhash. This will make such desing changes possible in the future if someone will find it important without breaking the backward compatibility. > >> [To preserve the build information] an instance could store the original >> system in >> a slot, which gets registered during the call to >> `deregister-immutable-system'. >> > If you preserve the build information, why change the system object at all? > > You seem all set on defining new classes for preloaded and immutable systems, > but don't explain why it's useful, just offer workaround for all the > detrimental effects > of the design. > You said it, it's desirable to not carry build information exposed in non-development host, but getting rid of the data isn't much so. Such solution keeps both qualities. > —♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics• http://fare.tunes.org > I'd rather write programs that write programs than write programs — Dick Sites Regards, Daniel -- Daniel Kochmański ;; aka jackdaniel | Poznań, Poland TurtleWare - Daniel Kochmański | www.turtleware.eu "Be the change that you wish to see in the world." - Mahatma Gandhi
