Am Sonntag, 17. Februar 2008 14:41 schrieb Neil Mitchell: > Hi > > > 2) You would hope there is a quick way to search those symbols. But > > most search engines do not treate symbols friendly, often just ignore > > them. I typed ~> in Hoogle, it also returned nothing. > > 3) If the module defining the symbol is not in standard library, it is > > not possible to look up the symbol in the core library index. > > The next version of Hoogle will allow you to search all the modules on > Hackage, i.e. it will find ~>. A month after I have written my thesis > this will all be done :-) > > Thanks > > Neil
I think, it won’t find it. As Cale said, it’s a type variable. It’s like the “a” in the following definition: data T a = T a a I think, Conal Elliott used an operator type variable in order to make his code more readable. The (~>) is a type parameter which stands for an arrow type. Best wishes, Wolfgang _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe