#11439: Request for comments: Allow duplicate type signatures -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Iceland_jack): It would also help simplify the FTP types, as well as showing possibly enlightening groupings (`(a -> b) -> (F a -> F b)` versus `(a -> b) -> F a -> F b`): {{{#!hs
:types length length :: Foldable t => t a -> Int
length :: [a] -> Int length :: Set a -> Int length :: Map k v -> Int }}} {{{#!hs
:types fmap fmap :: Functor f => (a -> b) -> f a -> f b
fmap :: Functor f => (a -> b) -> (f a -> f b) fmap :: (a -> b) -> ([a] -> [b]) fmap :: (a -> b) -> (Either e a -> Either e b) fmap :: (b -> c) -> (a -> b) -> (a -> c) }}} {{{#!hs
:types sequence sequence :: (Traversable t, Monad m) => t (m a) -> m (t a)
sequence :: Monad m => [m a] -> m [a] sequence :: [IO a] -> IO [a] sequence :: [Maybe a] -> Maybe [a] sequence :: [r -> a] -> (r -> [a]) sequence :: [[a]] -> [[a]] }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11439#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler