GHC 5.03 windows

2002-01-20 Thread Ronald Legere
Greetings, I am not sure if this is the right list... I have installed the GHC-5.03 windows 'release canidate' on windows XP. There is not much else on this particular computer. I have played with some basic things, and with Socket, and so far have not found anything to complain about :)

question about kinds

2002-01-20 Thread Tom Pledger
Hal Daume III writes: | Now, I want to say that if some data type 'd' is Traversable and | another data type 'e' is Traversable, then the combined data type | is Traversable. That is, for example, I want to say that a Tree of | Lists is traversable, or that a List of Trees, or a List of

Ambiguous types

2002-01-20 Thread Daniel .
Hi there, I've just starting learning Haskell and, to be quite frank, it gives me a cold sweat at times. What has me confused at present is why the following code gives me :- ActorTest.hs:8: Ambiguous type variable(s) `a' in the constraint `Action a' arising from use of

RE: dependent type query

2002-01-20 Thread Simon Peyton-Jones
| Furthermore, I can't even write: | | data (MyClass f a) = MyData2 f = MyData2 f | | Well now this is odd. I had no trouble simulating it with this: | | data MyData2 f = MyData2 f | | mkMyData2 :: (MyClass f a) = f - MyData2 f | mkMyData2 = MyData2 | | Looks like extended Haskell is