[Haskell-cafe] testing for exceptions

[Kim-Ee Yeoh]

On Sat, Oct 31, 2015 at 6:10 PM, Roel van Dijk <vandijk.roel at gmail.com>
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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.haskell.org/pipermail/haskell-cafe/attachments/20151102/5a36e247/attachment.html>