On Mon April 21 2008 3:26:04 pm Magnus Therning wrote:
In order to allow lazy decoding I ended up exporting decode' as well:
decode' :: String -> [Maybe Word8]
I take it that in a situation like this, you'd have either: [] -- success with empty result a list full of Just x -- success with valid results a list with 0 or more Just x, followed by one Nothing -- an error Makes sense to me. What impact does this have on performance? Also, I wonder if there is some call for tools in Data.Either to support this type of usage? For example: type EitherList a b = [Either a b] then some functions such as, say, mapEither or foldEither that act like try/catch: a special function to use for an exception, and otherwise they "unwrap" the Right side passing it along to others. -- John