On Sat, Nov 27, 2010 at 8:38 PM, Jinjing Wang
Hi Michael, you are absolutely correct, cabal did set the flags automatically.
To sum up, here's what needs to be done:
* add `flag ghc7` as a field in cabal * add:
if flag(ghc7) build-depends: base >= 4.3 && < 5 cpp-options: -DGHC7 else build-depends: base >= 4 && < 4.3
in library field in cabal
* add `{-# LANGUAGE CPP #-}` in source file * add
#if GHC7 x
#else y
#endif
Hi Antonine, I don't know how to not set those fields in the constructor.. as a QQ noob, I'm just hacking on some legacy code. This code doesn't compile in GHC7, so I have to do this trick.
* https://github.com/nfjinjing/mps/blob/master/src/MPS/TH.hs
Something like: myQuoter = QuasiQuoter { quoteExp = expQuoter, quotePat = patQuoter } Will work in either version, but it will leave the un-set fields set to `undefined`, so you'll get a compile error if you try to use them. I haven't tested this, but I've done it with other record types. Take care, Antoine