#8411: TypeSynonymInstances with partial type ----------------------------+---------------------------------------------- Reporter: wvv | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: GHC rejects valid program Unknown/Multiple | Test Case: Difficulty: Unknown | Blocking: Blocked By: | Related Tickets: | ----------------------------+---------------------------------------------- TypeSynonymInstances allow only full synonyms. With {{{ {-# LANGUAGE TypeSynonymInstances #-} type RTuple b a = (a, b) instance Monad (RTuple b) where ... -- or instance Monad (RTuple b :: * -> *) where ... }}} I got next error: {{{ test.hs:17:22: Type synonym `RevTuple' should have 2 arguments, but has been given 1 In the instance declaration for `Monad (RTuple b :: * -> *)' }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8411 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler