Re: [Haskell-cafe] does try force evaluation of IO value

5 Oct 2012


      * s9gf4ult@gmail.com  [2012-10-05 17:19:21+0600]
...
...
Prelude Control.Exception> r <- try (return $ error "bam") :: IO (Either
SomeException Int) Prelude Control.Exception> r
  Right *** Exception: bam
Wow, this is realy breaking news for me. Where can i read more about this 
magic ?
See chapter 19 of Real World Haskell, especially section "Laziness and
Exception Handling".
http://book.realworldhaskell.org/read/error-handling.html

Roman

Re: [Haskell-cafe] does try force evaluation of IO value

Roman Cheplyaka