#15253: Add support for type-level integers -------------------------------------+------------------------------------- Reporter: chessai | Owner: (none) Type: feature | Status: new request | Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.4.3 Keywords: compiler, | Operating System: Unknown/Multiple base | Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Similar to GHC.TypeNats, it would be nice to see something like the following: {{{#!hs newtype TypeInt (n :: Nat) = TypeInt Integer class KnownInt (n :: k) where intSing :: TypeInt n intVal :: forall n proxy. KnownInt n => proxy n -> Integer intVal _ = case intSing :: TypeInt n of TypeInt x -> x intVal' :: forall n. KnownInt n => Proxy# n -> Integer intVal' _ = case intSing :: TypeInt n of TypeInt x -> x }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15253 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler