Re: [Haskell-cafe] testing for exceptions

Oops yes! :) On Nov 2, 2015 13:38, "Kim-Ee Yeoh" wrote:

On Sat, Oct 31, 2015 at 6:10 PM, Roel van Dijk wrote:

...

Small nitpick, but I would generally put the "exception" or "error" in the Left part of an Either and a correct result in the Right part.

This has some advantages. 1 - Right is right as opposed to wrong. Easy to remember mnemonic. 2 - It fits neatly with the Monad (Either e) instance.

I think you're being modest when you call it a "small nitpick." If code can't get Left and Right right, that code immediately becomes very suspicious.

Thus, not

f2 :: Integer -> Either Integer ErrorString

but

f2 :: Integer -> Either ErrorString Integer Nice catch.

-- Kim-Ee