Am 04.06.2020 um 03:45 schrieb Kostas Michalopoulos via fpc-devel:
Hello,I'd like to add a small feature for property getters to allow themselves be exposed as a base type of the real field. Example: === program ExposeDerivedAsBase; {$mode objfpc} type TBase = class end; TDerived = class(TBase) end; TSomething = class private FProp: TDerived; public property Prop: TBase read FProp; end; begin end. === The reasoning for this patch is to expose fields directly, without any additional overheads while being able to hide the real type that the object uses internally.
I'm against it. It would essentially mean that you can't use the same field for the setter or that you'd need to go through a method. Exchanging one restriction (can't use a base class for the property) for another (can't use the same field for the setter) isn't worth it especially as you can avoid performance issues by using a getter method that is declared inline (the only case where this won't help is if you access it using RTTI, but one call more or less doesn't really change much anyway).
Regards, Sven _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel
