On Sun, Jan 3, 2010 at 8:30 PM, Patrick Caldon
I'm trying to write some template haskell which will transform:
$(buildCP 0) into \(SimpleM d1 d2 d3) (SimpleM _ _ _) -> (SimpleM d1 d2 d3) $(buildCP 1) into \(SimpleM _ d2 d3) (SimpleM d1 _ _) -> (SimpleM d1 d2 d3) $(buildCP 1) into \(SimpleM d1 _ d3) (SimpleM _ d2 _) -> (SimpleM d1 d2 d3) and so on.
Ultimately I want to generalize this to more variables.
I can't seem to get anything to substitute for the pattern variables in a lambda. Is there a straightforward way of doing this?
Hello, It looks like you want to construct expressions with the LamE constructor, which is declared like so: LamE [Pat] Exp For the Pat, you would use eiter VarP or WildP for variable binding patterns or wild-card patterns. Or am I missing something? Antoine