John Meacham wrote:
On Thu, Mar 02, 2006 at 03:53:45AM -, Claus Reinke wrote:
the problem is that we have somehow conjured up an infinite
type for Mul to recurse on without end! Normally, such infinite
types are ruled out by occurs-checks (unless you are working
with Prolog III;-), so
Claus,
I urge you to read our paper Understanding functional dependencies via
Constraint Handling Rules, which you can find here
http://research.microsoft.com/%7Esimonpj/papers/fd%2Dchr/.
It will tell you more than you want to know about why relaxing
apparently-conservative rules is entirely
On Thu, Mar 02, 2006 at 03:53:45AM -, Claus Reinke wrote:
- Mul recurses down a type in its second parameter
- types in Haskell are finite
- there is a non-terminating Mul inference
the problem is that we have somehow conjured up an infinite
type for Mul to recurse on without end!
