Thanks. What I really want to know is: How to describe a new type (Funcmap) which is itself a function type like a->b- >c so that I can use this new type in other functions? for example, I can define some other functions like:
theta :: Functionmap -> d ->e minus :: Funcmap ->...... I can put all the things there like : theta :: (a->b->c)->d->e but sometimes it's not convenient to do so. rui 引用 Lennart Augustsson <[EMAIL PROTECTED]>: > rui yang wrote: > > Suppose I have a function: > > > > funcmap :: a->b->c > > > > can I use type synonyms to describe a new type like this: > > Type Funcmap = a->b>c ? > > First, it's 'type' not 'Type'. > Second, you want '->' not '>'. > Third, all type variables in the RHS must be on the LHS. > So, we get > > type Funcmap a b c = a->b->c > ---------------------------------------- This mail sent through www.mywaterloo.ca _______________________________________________ Haskell mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell
