[Haskell-cafe] Maybe to Either -- is there a better way?

2 Aug 2010

      I find it convenient sometimes to convert a Maybe value to an Either thus (excuse the syntax, it's CAL, not Haskell):

maybeToEither :: a -> Maybe b -> Either a b;
maybeToEither errorValue = maybe (Left errorValue) (\x -> Right x);

but that seemingly obvious function isn't in Hoogle, AFAICT, so perhaps there's some other approach?

Thanks,
  Tom

[Haskell-cafe] Maybe to Either -- is there a better way?

Tom Davies