Hi Philip, On Fri, May 11, 2012 at 5:12 PM, "Philip K. F. Hölzenspies" < p...@st-andrews.ac.uk> wrote:
> > However, it turns out that this never leads to an evaluation of > extTyNamesLoc. I've come as far as to see that, since "Located a" is a > synonym for "GenLocated SrcSpan a", the type we're looking for really has a > binary constructor, thus we should use ext2Q. > > This made things work: We first modify the function we apply to Located > things: > > > extTyNamesLoc :: (Data loc, Data a) => SrcSpan -> GenLocated loc a -> > OccurrenceTable > extTyNamesLoc l (L l' x) = case cast l' of > Just l'' -> extTyNames l'' x > Nothing -> extTyNames l x > Do you really need this? Can't you use the definition of `extTyNamesLoc` shown previously, and redefine `extTyNames` to use `ext2Q`, as in: > extTyNames l x = (extTyNamesDef l x `mkQ` extTyNamesTy l `ext2Q` > extTyNamesLoc l) x > ? Cheers, Pedro
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