On Thu, Apr 28, 2005 at 09:22:15PM -0400, Cale Gibbard wrote: > The second problem arises from hugs not doing the same thing as ghci > with respect to looking up qualified variable names (that is, those > with the module name specified, in this case, the standard module > Char). You can tell hugs to also load the Char module on top of > whatever code you have loaded by using the command ":also Char", after > which the prompt should look like > Char> > and you can try > toUpper 'a'
Might as well use :load -- in both case Char becomes the new current module, making the old current module inaccessible. Hal: Char.toUpper and Char.isLower in Chapter 3 seem to be a perennial stumbling block for Hugs users -- could you suggest that Hugs users load Char and just say toUpper and isLower instead? > (without the Char, hugs doesn't seem to like qualified names, perhaps > someone else can explain this) Since you ask: the names in scope at the Hugs prompt are exactly those in scope inside the current module, which is Char in this case. Now Char just imports and re-exports names from Data.Char, so inside Char there is no Char.toUpper, just toUpper and Data.Char.toUpper. On the other hand, inside a module Test that imports Char, you can refer to Char.toUpper as well as toUpper. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
