Martin Schreiber schrieb:
May I repeat the idea of "friend units"?
While designing a complex framework like Lazarus, fpGUI or MSEgui there
constantly is the need to access low level functions from other classes. Now
one has the options to write the whole framework in a single unit (ex.
db.pas), to make most of the class elements public or to use local alias type
definitions.
This also requires to modify the existing classes. If every user can do
that, encapsulation *really* has gone away :-(
The introduction of "friend units" would be a simple solution. In "friend
units" the protected class members would be visible. So if you build a
framework and you know what you do, list the base units of the framework as
friends of higher level units of the same framework.
See "framework" as an special case of what a user wants to achieve.
Where will you draw a boundary between *acceptable* and *unwanted*
breaking of visibility, by using friends, class helpers or any other means?
DoDi
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