Hello!
The paper
http://research.microsoft.com/~simonpj/papers/hmap/
by Ralf Laemmel and Simon Peyton Jones gave a reference
implementation of a 'cast' function. Here's another implementation:
cast:: (Show a, Read b) = a - Maybe b
cast = read_as . show
where
read_as s =
This is getting off-topic, but...
I don't like this solution at all :). It is very dependent on read being
a true inverse of show, which isn't always the case. Perhaps more
importantly though, I don't like the fact that it will readily convert
between Int and Float, etc. For instance, in
