[fpc-devel] New feature discussion: for-in loop

["Vinzent Höfler"]

Graeme Geldenhuys <graemeg.lists at gmail.com>:

> Well, with for-in you can only loop through a list is a specific order
> and direction. You can't peak forward, you can't move back, you can't
> filter returned content.

At least you know it will terminate. That always was a guaranteed property of the for-loop. With being able to move back and forth as some iterator wishes, this property will be gone forever.

Iterators:                Good idea.
Using for-loops for that: Bad idea.

for-loops are for "static" things, be it enumerations, sets, or ranges. I would vote for that, but not for (disguised) iterators in for-loops. Those are more suited for while-loops.


Vinzent.
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