Ozgur Akgun <ozgurak...@gmail.com> writes: > Hi all, > > The constructor names in Haskell need to obey one of the two following > rules: > - either starts with a capital letter and contains alphanumeric characters > afterwards, (including _ I guess) > - or starts with a colon (:) and only contains symbols afterwards > > The first one is used Prefix by default, and the second ose is used infix by > default. > > What stops us from allowing alphanum characters appear in the Infix version > (after the colon)? Can't it be relaxed to only start woth a colon?
The definition. I believe this is probably to make parsing of "foo:<bar" (using your example below) unambiguous, the same as how symbolic operators can't contain alphanumeric characters, etc. > > So I want to be able to say something like: > > data Expr = Expr :< Expr -- checks for LT betwen two Expr's > | Expr :<2 Expr -- a different implementation of the > same thing maybe > | Expr :<veryfast Expr -- and the veryfast implementation > of it How does a data structure have a faster implementation? >_> -- Ivan Lazar Miljenovic ivan.miljeno...@gmail.com IvanMiljenovic.wordpress.com _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
