On Tue, 20 Oct 2009, Paul Ishenin wrote:
Hello, FPC developers' list.
I think we can close 'sealed/abstract class' page and open another
interesting topc.
It is obvious you are full of energy to discuss new language features.
The next feature which we should think of is for-in loop:
http://wiki.lazarus.freepascal.org/for-in_loop
There you can find:
1. Delphi implementation details
2. Proposed extended syntax
3. Proposed compiler implementation
While discussion please try to have delphi compatibility in the mind.
At least one of the reasons we never did implement for-in is the absolutely
horrible and totally wrong idea to use classes/interfaces for this, to which
I seriously objected.
The guy who thought of that should be shot, hanged, guillotined and poisoned.
(you pick your order) It is a total negation of everything that pascal stands for:
let a language feature (for in) depend on a user-class implementation.
I can understand
for y in enumerated do
or
For y in set do
or
For Y in range do
Because this seems a natural extension of loops to enumerates (and even
then) But not ever the class-based one.
Michael.
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