[fpc-devel] Limitations of static "ranged" integer types and succ/pred, and dynamic solution.
DrDiettrich1 at aol.com
Wed Dec 21 12:09:35 CET 2011
Skybuck Flying schrieb:
> ^ All of these examples are quite bad in the following way:
> They become very static, which makes it pretty much impossible to change
> their range at runtime.
That's by design.
> These types are pretty much a left over from the days of turbo pascal, and
> is a reason why people switched to C, where arrays where dynamic in
C arrays are emulated by pointer operations, i.e. p[i] is equivalent to
(p+i)*, with no chance left for range checks.
Delphi has added dynamic arrays, with range checks possible at runtime.
> The succ/pred functions are also pretty useless and dangerous.
Depends on proper implementation (with wrap-around).
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