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Another feature suggestion
Posted: 13 Feb 2023 17:28
by Harrison Pratt
After having explored PropertyDepot ideas, it seems that a nice feature for VP would be a compiler directive that could automatically insert the property getters and setters into the implementation file.
That would make a database of properties less important.
Maybe something like this:
Code: Select all
interface myClass
properties [autoProperty] % automatic code appended to myClass.pro
tally : integer := 0. % count of everything
total : real. % sum of everything
properties % no code generation
textColor : ::color.
bgColor : ::color.
centerText : boolean.
end interface myClass
Code: Select all
Implement myClass
...
% This PROPERTY code is maintained automatically, do not update it manually.
% 11:56:28-10.2.2023
facts % for autoProperties
...
clauses % for autoProperties
...
% end of automatic PROPERTY code
end implement myClass
Re: Another feature suggestion
Posted: 14 Feb 2023 10:53
by Thomas Linder Puls
Well, I have two "problems" with this suggestion. First of all it is a strict rule that implementation details are written in the implementation; interfaces only defines the interface.
Secondly, the suggested auto code has exactly the same effect as implementing the property with a fact:
Code: Select all
interface ...
property
aProperty : someDomain.
implement ...
facts
aProperty : someDomain := ....
Implementing a property using "getters" and "setters" mainly makes sense, if you want some
other functionality than the plain get/set functionality. But in that case the code will be
different from the auto code and then it cannot be maintained automatically.
Re: Another feature suggestion
Posted: 14 Feb 2023 13:51
by Harrison Pratt
Thanks ... it seems I've been under-thinking this.
Re: Another feature suggestion
Posted: 14 Feb 2023 22:14
by Gukalov
I have a dream)))
The simplest set/get declaration in class/interface with value settings:
Code: Select all
properties
aProperty : someDomain := someValue.
also declares the corresponding fact without extra words in implement.
Re: Another feature suggestion
Posted: 16 Feb 2023 9:29
by Thomas Linder Puls
Unfortunately, that dream will not come through. Interfaces define the interface of objects the implementation is written in the implementation. Also recall that though you think of a class and interface together, a single interface can be used for many classes.
Likewise a class defines the "interface" of a class, the implementation is written in the implementation.