[fpc-devel] Sets > 256
Marco van de Voort
marcov at stack.nl
Thu Oct 15 16:26:32 CEST 2015
In our previous episode, Michael Van Canneyt said:
> >> same format.
> > Yes, this would be a problem. But wouldn't this be an acceptable price for
> > the improvement?
> No, it is not that simple. Lazarus would stop working completely.
Sets have a size that is a function of the number of elements. (delphi mode
per byte, fpc mode per 32-bit). I don't see how raising the max number of
elements would affect Lazarus. F(nr of elements) would still give the same
(it does matter that sets are allocated always from element 0 though)
There already is a lot of variation just run the below program for mode
delphi and objfpc
type txxx = set of 50..60;
var x : txxx;
mode delphi prints "2", objfpc prints "32"
I always considered the 256 extremely annoying since it makes sets and enums
not very scalable. Raising the limit would also make bitindexing with larger
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