22 Feb
2005
22 Feb
'05
6:23 a.m.
On Tue, Feb 22, 2005 at 11:14:22AM +0000, Malcolm Wallace wrote:
** A: g xs = do ys <- workM xs if null ys then return [] else do zs <- workM ys return zs
I believe nhc98 is correct in parsing this as:
g xs = do ys <- workM xs (if null ys then return [] else do zs <- workM ys return zs)
I don't think so: exp10 -> ... | if exp then exp else exp | fexp fexp -> [fexp] aexp The argument can't be an if-expression.