#10512: Generic instances missing for Int32, Word64 etc. -------------------------------------+------------------------------------- Reporter: andreas.abel | Owner: Type: feature request | Status: closed Priority: normal | Milestone: Component: Core Libraries | Version: 7.10.1 Resolution: wontfix | Keywords: Generics Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #9526 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Iceland_jack): Seems to break example from [https://hackage.haskell.org/package/Chart-1.1/docs/Generics-Deriving- Lens.html Generics.Deriving.Lens] {{{ ghci> allOf tinplate (=="Hello") (1::Int,2::Double,(),"Hello",["Hello"]) <interactive>:85:7: error: • No instance for (GHC.Generics.Generic Char) arising from a use of ‘tinplate’ • In the first argument of ‘allOf’, namely ‘tinplate’ In the expression: allOf tinplate (== "Hello") (1 :: Int, 2 :: Double, (), "Hello", ["Hello"]) In an equation for ‘it’: it = allOf tinplate (== "Hello") (1 :: Int, 2 :: Double, (), "Hello", ["Hello"]) }}} {{{ ghci> mapMOf_ tinplate putStrLn ("hello",[(2 :: Int, "world!")]) <interactive>:86:9: error: • No instance for (GHC.Generics.Generic Char) arising from a use of ‘tinplate’ • In the first argument of ‘mapMOf_’, namely ‘tinplate’ In the expression: mapMOf_ tinplate putStrLn ("hello", [(2 :: Int, "world!")]) In an equation for ‘it’: it = mapMOf_ tinplate putStrLn ("hello", [(2 :: Int, "world!")]) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10512#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler