Hi Victor --
I'm happy to report that Elliot Ronaghan has fixed this bug and committed
the fix to master, so if you're working from GitHub and up-to-date, your
program should work correctly now. If you're working from releases, this
will appear in the 1.11 release which will be available on April 2nd.
Thanks for giving us the incentive to finally nail this one down!
-Brad
On Wed, 4 Mar 2015, Brad Chamberlain wrote:
Hi Victor --
You're not doing anything wrong, and are unfortunately running into a bug in
our implementation, listed in the STATUS file as: "Iterator methods may not
obey dynamic dispatch". The reason that the wording here is vague is that
it's not entirely clear to us (to me anyway) under what conditions the bug
manifests itself. For example, if I insert an "for i in 1..limit" in each of
your iterators, it seems to work.
I'm reasonably certain that the bug relates to an issue with iterator
inlining, and that if you compile with --no-inline-iterators, things should
work OK (at least, for your test program, things work for me). Please give a
shout if you find cases in which the --no-inline-iterators flag doesn't seem
to help.
Apologies for this bug which has been around longer than I'd care to admit.
I'll see if we can get someone on it for the upcoming release.
-Brad
On Wed, 4 Mar 2015, Victor Chaves wrote:
Hi,
I'm trying to choose dynamically which iterator to use, so I'm using class
inheritance with iterators inside them, like this:
class Abstract {
iter Iterator(limit: int) {
yield 0;
}
}
class Concrete : Abstract {
iter Iterator(limit: int) {
yield 1;
}
}
But if I write
var myclass : Abstract = new Concrete();
myclass.Iterator(n) yields 0 instead of 1.
Is there something I'm missing? Isn't Iterator supposed to get overriden?
Thanks.
--
Victor Chaves
Engenharia de Computação
Instituto Militar de Engenharia
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