How to catch a no parse exception from the read function in Haskell?

Question

In my Haskell program, I want to read in a value given by the user using the getLine function. I then want to use the read function to convert thi

Answer 1

Here's an improved maybeRead which allows only for trailing whitespaces, but nothing else:

import Data.Maybe
import Data.Char

maybeRead2 :: Read a => String -> Maybe a
maybeRead2 = fmap fst . listToMaybe . filter (null . dropWhile isSpace . snd) . reads