[mercury-users] literature polymorphic recursive calls

[Ralph Becket]

Hi Tom,

Tom Schrijvers, Monday, 20 June 2005:
> Hi,
> 
> I am looking for literature about a particular aspect of Mercury's type
> inference, namely the way it deals with polymorphic recursive calls. Is
> there some documentation about the iteration limit and what recursive
> calls lead to infinite types? Are there any new or upcoming developments
> on this account?

The best document on the subject would be David Jeffrey's Ph.D.
dissertation, "Expressive type systems for logic programming languages"
http://www.cs.mu.oz.au/research/mercury/information/papers.html#dgj-thesis-final

We don't have any current plans to extend the type system other than to
add constructor classes to the type class system.  We have discussed 
moving to a constraint-based approach to type analysis, but have neither
the need nor the money to justify the work at present!

Hope that helps,
-- Ralph
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