4 Jul
2010
4 Jul
'10
12:31 p.m.
On Sun, 4 Jul 2010 15:47:21 +0200, Ertugrul Soeylemez
This requires a bunch of type system extensions, though, most notably the UndecidableInstances extension. But it's safe to use here.
Probably a bit off topic, but whats wrong with UndecidableInstances? Where is it safe to use, when would you avoid it and what can go wrong here?