ghc 7.8.2 compatibility

.travis.yml

 language: haskell
 
 env:
+ - GHCVER=7.8.2
  - GHCVER=7.8.3
 
 before_install:

haddock-api/haddock-api.cabal

@@ -45,7 +45,7 @@ library
     , array
     , xhtml >= 3000.2 && < 3000.3
     , Cabal >= 1.10
-    , ghc == 7.8.3
+    , ghc >= 7.8.2 && < 7.8.4
 
     , ghc-paths
     , haddock-library == 1.1.0.*

src/Haddock/Convert.hs

-{-# LANGUAGE PatternGuards #-}
+{-# LANGUAGE CPP, PatternGuards #-}
 -----------------------------------------------------------------------------
 -- |
 -- Module      :  Haddock.Convert
@@ -94,10 +94,19 @@ tyThingToLHsDecl t = noLoc $ case t of
     (synifyType ImplicitizeForAll (dataConUserType dc)))
 
   AConLike (PatSynCon ps) ->
+#if MIN_VERSION_ghc(7,8,3)
       let (_, _, req_theta, prov_theta, _, res_ty) = patSynSig ps
+#else
+      let (_, _, (req_theta, prov_theta)) = patSynSig ps
+#endif
       in SigD $ PatSynSig (synifyName ps)
+#if MIN_VERSION_ghc(7,8,3)
                           (fmap (synifyType WithinType) (patSynTyDetails ps))
                           (synifyType WithinType res_ty)
+#else
+                          (fmap (synifyType WithinType) (patSynTyDetails ps))
+                          (synifyType WithinType (patSynType ps))
+#endif
                           (synifyCtx req_theta)
                           (synifyCtx prov_theta)
 

src/Haddock/Interface/Create.hs

-{-# LANGUAGE TupleSections, BangPatterns, LambdaCase #-}
+{-# LANGUAGE CPP, TupleSections, BangPatterns, LambdaCase #-}
 {-# OPTIONS_GHC -Wwarn #-}
 -----------------------------------------------------------------------------
 -- |
@@ -366,7 +366,11 @@ classDecls class_ = filterDecls . collectDocs . sortByLoc $ decls
   where
     decls = docs ++ defs ++ sigs ++ ats
     docs  = mkDecls tcdDocs DocD class_
+#if MIN_VERSION_ghc(7,8,3)
     defs  = mkDecls (bagToList . tcdMeths) ValD class_
+#else
+    defs  = mkDecls (map snd . bagToList . tcdMeths) ValD class_
+#endif
     sigs  = mkDecls tcdSigs SigD class_
     ats   = mkDecls tcdATs (TyClD . FamDecl) class_
 
@@ -392,7 +396,11 @@ ungroup group_ =
   mkDecls hs_docs                DocD   group_ ++
   mkDecls hs_instds              InstD  group_ ++
   mkDecls (typesigs . hs_valds)  SigD   group_ ++
+#if MIN_VERSION_ghc(7,8,3)
   mkDecls (valbinds . hs_valds)  ValD   group_
+#else
+  mkDecls (map snd . valbinds . hs_valds)  ValD   group_
+#endif
   where
     typesigs (ValBindsOut _ sigs) = filter isVanillaLSig sigs
     typesigs _ = error "expected ValBindsOut"