2008/2/20 Jeff φ [EMAIL PROTECTED]:
I'd love to find a good article that describes the ins and outs of multi
parameter types, functional dependencies, and type assertions, in enough
detail to resolve these surprises. A step-by-step walk through showing how
the compiler resolve a type and
On 2/20/08, Jeff φ [EMAIL PROTECTED] wrote:
-- SURPRISE 1: If function, arrTypeCast, is removed, (from both
-- the class and instance) GHC assumes the kind of a and b are *,
-- instead of * - * - * and produce . . .
--
-- report3.hs:37:24:
-- `UArray' is not applied to enough type
On 2/21/08, Jeff φ [EMAIL PROTECTED] wrote:
Thanks again. I'm not familiar with type equality constraints. I could not
find information on this in the GHC users guide. Is it documented
somewhere?
Section 7.3 here talks about equality constraints.
2008/2/19 Jeff φ [EMAIL PROTECTED]:
instance SmartArraySelector UArray Bool where
instance SmartArraySelector UArray Char where
instance SmartArraySelector UArray Double where
instance SmartArraySelector UArray Float where
instance SmartArraySelector UArray Intwhere
Well, I'm not
On Wed, 20 Feb 2008, Brent Yorgey wrote:
2008/2/19 Jeff ö [EMAIL PROTECTED]:
instance SmartArraySelector UArray Bool where
instance SmartArraySelector UArray Char where
instance SmartArraySelector UArray Double where
instance SmartArraySelector UArray Float where
instance
Oleg's done a lot of work here; there's a bunch of magic that can be
done with TypeCast. I took my inspiration from here:
http://okmij.org/ftp/Haskell/typecast.html#ambiguity-resolution
Here are some tests in ghci (note that I specialized the index type in
test to Int to make this shorter; doing
On 2/19/08, Ryan Ingram [EMAIL PROTECTED] wrote:
Oleg's done a lot of work here; there's a bunch of magic that can be
done with TypeCast. I took my inspiration from here:
http://okmij.org/ftp/Haskell/typecast.html#ambiguity-resolution
. . .
The trick is to represent whether a type is
I'm trying to create a type called SmartArray. It is a type synonym for an
array. If the element type can be unboxed, then SmartArray is an unboxed
array. Otherwise, it is a boxed array.
For instance,
(SmartArray Int Double) is the same as (UArray Int Double)
(SmartArray Int String) is the
