#7964: GADTs in Haskell98 style -----------------------------+---------------------------------------------- Reporter: wvv | Owner: Type: feature request | Status: new Priority: normal | Component: Compiler (Type checker) Version: 7.6.3 | Keywords: Os: Unknown/Multiple | Architecture: Unknown/Multiple Failure: Other | Blockedby: Blocking: | Related: -----------------------------+---------------------------------------------- Comment(by thoughtpolice): It's possible to do this already with a slightly different syntax. {{{ {-# LANGUAGE TypeFamilies, ExistentialQuantification #-} data Foo a = (a ~ Int) => FooInt a | (a ~ Char) => FooChar a }}} -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7964#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler