Lennart Augustsson wrote:
On the subject of type signatures, I don't want to
make them mandatory, but I think they should be strongly
encouraged. I don't buy the argument that they make
refactoring programs that much harder. It's still
very easy to do, the type checker will tell you exactly
where. :)
It can still be in a LOT of places--far too many for comfort. I'm not
making this
up--I've experienced severe problems in practice caused by this very
point. It depends
what kind of code you're working with, of course. I'm not saying type
signatures
are ALWAYS a problem for refactoring, just that they sometimes are--and that
it makes sense to leave it up the programmer whether or not to include them.
By the way, you leave out a lot of type signatures too. Your Djinn
module contains
29 declarations with type signatures--and 17 without. The 17 are local,
but local
declarations are precisely those where, without the M-R, a lack of
sharing would be
most likely to bite.
John
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