Hello, List! The postings converning Classes/Objects/Pointers / Pointer Help I've read miss one point: There's need for uninitialized, static objects that are usable without calling a constructor.
We use static objects to build dynamic ones; but dynamic objects cannot be used to build static ones. Let's assume an object-oriented system where power is switched ON and the contents of RAM are unknown. The software then must call a constructor, and store the result (the pointer to the first object instance in the system) in an object field, in order to work with the new object. But there's no object yet where that constructor's result might be stored = contradiction. IOW, and informally, when there are no static, uninitialized objects, you have to withdraw the object-oriented approach from the hardware level up to higher, more "sophisticated" (?) levels. Object Pascal would then loose the ground under it's feet - it would no more be suited to program an operating system using OOP. Let's stay on this n'th floor = static records, objects and interfaces, before looking at "higher" things such as dynamic allocation or virtual methods. I suggest, while still supporting all legacy code, to create a new, unified approach for records, objects and interfaces. I here use the term 'whole', but that's just a proposal. *** type t_star_position = whole // a record declination: real; rectascension: real; end; type t_window = whole // a static object x0, y0, x1, y1: integer; procedure clear(a_title: string); end; type t_char_device = whole // an interface function char_available: boolean; function read_char: char; end; I think this could be a new thread, so I renamed the subject. Anton Tichawa. ---------- "Adas Methode war, wie sich zeigen wird, Tagträume in offenbar korrekte Berechnungen einzuweben." Doris Langley Moore: Ada, Countess of Lovelace (London 1977). ---------- Anton Tichawa Volkertstrasse 19 / 20 A-1020 Wien mobil: +43 664 52 07 907 email: [EMAIL PROTECTED] ---------- _______________________________________________ fpc-pascal maillist - [EMAIL PROTECTED] http://lists.freepascal.org/mailman/listinfo/fpc-pascal
