
#13573: Add Foldable1 to base -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #10365 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by chshersh): If this type class will be added to `base` library one day (which I personally really like to see) I would love to add that it would be good to have `fold1'` function with strict semantic (similar to `foldl'`). Otherwise `fold1 $ map Sum (1 :| [2 .. 10^8])` would take infinite amount of time and memory to calculate and there will be no better way to do this. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13573#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler