This should be a list of minor (mostly) backwards compatable changes to the standard libraries. Proposed new libraries should go on NewLibraryCandidates

  • signatures of when and unless generalized
  • move 'join' and 'ap' into the Monad class
  • remove exports of functions from libraries that are also exported by the prelude (to make overriding prelude functions easier)
  • lookup,elemIndex,find,findIndex to be generalized to return result in monad instead of forced to be a maybe
  • remove catch from the Prelude
  • behavior of array on repeated indices (H98: bottom, GHC: last value)
  • read of octal and hex Int constants (email message)
  • swap for tuples
  • specify strictness of I/O functions (thread on haskell list)
  • make groupBy (and possibly nubBy) work with any relation, not just symmetric transitive ones (message on haskell-cafe)

new simple functions

replicateM, replicateM_, repeatM, repeatM_

-- | the generalization of readIO. readIO can be deprecated if wished if this is included.
readM :: (Read a, Monad m) => String -> m a
readM = ... 

toMaybe :: Bool → a → Maybe a (added to Maybe library)

Last modified 11 years ago Last modified on Oct 31, 2006 1:08:05 AM