On Thu, Jan 9, 2014 at 10:36 AM, Vlatko Basic
If you just want to signalize a fail case without any additional information, then a Maybe fits better than an Either, because why should you need this bogus empty string?
Now it looks to me that it might be better and more consistent to write an empty bogus string (as with: nothing = Left "") than to have two distinct ways of error reporting, and both are used widely and often should be intermixed. And at the end, call site could decide does it want to use the string or not.
I should note here that this is pretty much the "fail" method for Monad, which is widely considered to have been a mistake. -- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net