Prelude Data.Void> :info Void
data Void -- Defined in `Data.Void'
instance [safe] Eq Void -- Defined in `Data.Void'
instance [safe] Ord Void -- Defined in `Data.Void'
instance [safe] Read Void -- Defined in `Data.Void'
instance [safe] Show Void -- Defined in `Data.Void'
Co oznacza [bezpieczny]?Co oznacza [bezpieczny] znacznik w ghci?
Zaktualizowany link do [Haskell Users Guide for Safe extension] (https://downloads.haskell.org/~ghc/7.8.4/docs/html/users_guide/safe-haskell.html) – mschmidt