Hi All, I have been developing a type inference system which is very similar to type classes' (by Wadler and Blott). However, I cannot find a detailed description of the algorithm. In "Type Classes in Haskell", implementation issues are discussed briefly. However, it is too brief for me to grasp. Does anybody have any suggestion on where to look? Thanks, Robert _________________________________________________________________ Get an advanced look at the new version of MSN Messenger. http://messenger.msn.com.sg/Beta/Default.aspx