On Thu, Nov 29, 2012 at 12:52:38PM -0900, Christopher Howard wrote:
Is there any special extension or syntax trick that would allow me to reduce the amount of this repetitious code?
I am not aware of any (which doesn't mean there is none). I would hack a few lines of Template Haskell for this. Should be pretty straight forward. Use the thee quotation operator like so ---8<--- [| {- code -} |] --->8--- to get the Haskell AST of this code snippet and pretty print it. Then you have a good starting point for what your TH function should return. Note, that if the TH function returns 'Q [Dec]' you don't need a splice operator for top-level declarations. Instead, you can simply write ---8<--- data SomeThing = .... instantiate 'SomeThing --->8--- where instantiate is your TH function. Pretty handy, IMHO. See [1] for a starting point. HTH Alex [1] http://www.haskell.org/ghc/docs/7.6.1/html/users_guide/template-haskell.html