28 May
2006
28 May
'06
12:32 p.m.
hi
2006/5/25, Joel Reymont
[snip] Also, it seems to me that the only way to deal with variable numbers of differently typed arguments is to use the HList approach which is quite heavy machinery, IMO.
(i ve made a quick read of previous reply .. think there is not my answer :) the usual way to deal with that is just http://www.haskell.org/hawiki/ExistentialTypes. To put it simply : u encapsulate each different data type in one "unifying" wrapping type. It works as long as each wrapped type belongs to the same (haskell) class. I think that if you add a String or something to identify the wrapped data, you can manage the data part of you problem (but i dont know for moving functions). Cheers, mt