On Fri, Apr 29, 2005 at 06:56:28PM +0200, Daniel Fischer wrote: > So with :a(lso) the old module remains in sight for :n(ames) - and for :i in > qualified form. Unfortunately I haven't found a way to use them, Hugs (Nov. > 2003) in general refuses qualified names, though with some rather weird > behaviour: > > Prelude> :l Test > Test> :a Char > Char> Prelude.map toUpper "buh" > "BUH" > Char> Data.Char.toUpper 'u' > 'U' > Char> :i Test.my_map > my_map :: (a -> b) -> [a] -> [b] > > Char> Data.Char.toUpper 'u' > ERROR - Undefined qualified variable "Data.Char.toUpper" > Char> Prelude.map toUpper "buh" > ERROR - Undefined qualified variable "Prelude.map" > > How can it be that Hugs knows these qualified names before I ask about > Test.my_map but not afterwards?
Hugs discards the import table of a module when switching modules, e.g. with :m. It used to hold on to it, but this cost a lot of space. So the qualified names in scope at the prompt immediately after :load are what the user's guide says, but they disappear when you switch modules. Unfortunately :i is also implemented using module switching. _______________________________________________ Hugs-Users mailing list Hugs-Users@haskell.org http://www.haskell.org/mailman/listinfo/hugs-users
