[fpc-devel] Dangerous optimization in CASE..OF

[Martok]

Am 13.07.2017 um 22:24 schrieb Marco van de Voort:
> Personally I think the input validation angle to justify checking enums is
> dragged-by-the-hairs. 
I completely agree with you on that. Although in a different way ;-)

That was just the easily-observable breakage of a common pattern. If anybody
actually read what I wrote after Florian clarified the actual issue, I already
narrowed it down to 'simple' compatibility and self-consistency.

There is a fundamental difference in the type system between a somewhat sensible
(if unexpected) assumption in FPC and a more practical documented definition in
every other Pascal compiler. An assumption that even FPC follows only in this
one single spot.
This is unexpected and breaks unrelated code. That's the problem.


Good night,

Martok