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-rw-r--r--haddock-api/src/Haddock/Convert.hs9
1 files changed, 8 insertions, 1 deletions
diff --git a/haddock-api/src/Haddock/Convert.hs b/haddock-api/src/Haddock/Convert.hs
index 7f807569..2458f027 100644
--- a/haddock-api/src/Haddock/Convert.hs
+++ b/haddock-api/src/Haddock/Convert.hs
@@ -100,7 +100,14 @@ tyThingToLHsDecl t = case t of
(synifySigWcType ImplicitizeForAll (dataConUserType dc)))
AConLike (PatSynCon ps) ->
- allOK . SigD $ PatSynSig (synifyName ps) (synifySigType WithinType (patSynType ps))
+ let (univ_tvs, req_theta, ex_tvs, prov_theta, arg_tys, res_ty) = patSynSig ps
+ qtvs = univ_tvs ++ ex_tvs
+ ty = mkFunTys arg_tys res_ty
+ in allOK . SigD $ PatSynSig (synifyName ps)
+ (Implicit, synifyTyVars qtvs)
+ (synifyCtx req_theta)
+ (synifyCtx prov_theta)
+ (synifyType WithinType ty)
where
withErrs e x = return (e, x)
allOK x = return (mempty, x)