Simon Marlow wrote:
class HasBounds a = IArray a e where
(!) :: Ix ix = a ix e - ix - e
array :: Ix ix = (ix,ix) - [(ix,e)] - a ix e
class (Monad m, HasBounds a) = MArray a e m where
read:: Ix ix = a ix e - ix - m e
Simon Marlow wrote:
Actually, I'm slightly concerned about your use of small arrays: the static
(one-off) cost of allocating an array is quite high compared to eg. tuples
or records. Are arrays the only solution here?
You're right of course that arrays are quite expensive, but
it is not
Some commented type signatures in MArray interface mention ST instead
of the generic monad. Signatures of MArray class operations have
"a s ix e" instead of "a ix e".
Oh, thanks. As you can see, I've been through a few iterations with the
design already :)
A proposal to resolve name
