Jürgen Hestermann schrieb:
> Compare the compiler flags of TP and FPC. TP is a toy compared to FPC.
But what has all this to do with the concept of packages? The concepts
used in TP where enough to allow arbitrary complex applications. And my
main critic about all this is, that even when new concepts are
introduced they should be rock solid. This looks more like a design study.
Many languages have problems with e.g. multi-platform issues or, in case
of Lazarus, with multiple implementations (of the widgetset), selectable
at build time. The same for (third-party) libraries, which may or may
not come with source code. That's why features like "packages" have been
invented, to overcome such management problems (search paths...). Of
course everybody can manage that himself, writing and updating Makefiles
etc., but then he has no assistance by other tools (expect written by
himself).
> The normal user creates a LCL application and everything is setup for
him.
That's exactly what I did. I used Larazus to create a console
application. I then added my general purpose unit to the uses clause.
Then compile failed with an error message that had nothing to do with my
program or unit.
IIRC your case is somewhat non-standard, because you use an *abstract*
class. In such an case *every* user has to indicate the unit or package,
where that abstract interface is implemented.
You are right in so far as Lazarus contains a couple of such abstract
classes, some of which *never* can be implemented outside their
declaring unit. Perhaps the developers *wanted* to allow for more
flexibility, by declaring abstract classes and virtual methods first,
but in many cases they forgot to make their supplied default
implementation used *by default* (e.g. GRIDS), or they forgot to add
features that allow to create alternative implementations at all (e.g.
TDragManager).
More discussion of such issues should lead to an improved situation,
where the inventors have fixed obvious flaws, and have added
documentation and means for alternative implementations.
DoDi
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