diff options
Diffstat (limited to 'haddock-api/src/Haddock/Convert.hs')
| -rw-r--r-- | haddock-api/src/Haddock/Convert.hs | 46 |
1 files changed, 25 insertions, 21 deletions
diff --git a/haddock-api/src/Haddock/Convert.hs b/haddock-api/src/Haddock/Convert.hs index d74d528e..952650c1 100644 --- a/haddock-api/src/Haddock/Convert.hs +++ b/haddock-api/src/Haddock/Convert.hs @@ -96,17 +96,10 @@ tyThingToLHsDecl t = case t of -- a data-constructor alone just gets rendered as a function: AConLike (RealDataCon dc) -> allOK $ SigD (TypeSig [synifyName dc] - (synifyType ImplicitizeForAll (dataConUserType dc))) + (synifySigWcType ImplicitizeForAll (dataConUserType dc))) AConLike (PatSynCon ps) -> - let (univ_tvs, ex_tvs, req_theta, 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) + allOK . SigD $ PatSynSig (synifyName ps) (synifySigType WithinType (patSynType ps)) where withErrs e x = return (e, x) allOK x = return (mempty, x) @@ -316,16 +309,16 @@ synifyDataCon use_gadt_syntax dc = , con_cxt = ctx , con_details = hat , con_res = hs_res_ty - , con_doc = Nothing } + , con_doc = Nothing -- we don't want any "deprecated GADT syntax" warnings! - False + , con_old_rec = False } synifyName :: NamedThing n => n -> Located Name synifyName = noLoc . getName synifyIdSig :: SynifyTypeState -> Id -> Sig Name -synifyIdSig s i = TypeSig [synifyName i] (synifyType s (varType i)) [] +synifyIdSig s i = TypeSig [synifyName i] (synifySigWcType s (varType i)) synifyCtx :: [PredType] -> LHsContext Name @@ -337,12 +330,14 @@ synifyTyVars ktvs = HsQTvs { hsq_kvs = map tyVarName kvs , hsq_tvs = map synifyTyVar tvs } where (kvs, tvs) = partition isKindVar ktvs - synifyTyVar tv - | isLiftedTypeKind kind = noLoc (UserTyVar name) - | otherwise = noLoc (KindedTyVar (noLoc name) (synifyKindSig kind)) - where - kind = tyVarKind tv - name = getName tv + +synifyTyVar :: TyVar -> LHsTyVarBndr Name +synifyTyVar tv + | isLiftedTypeKind kind = noLoc (UserTyVar name) + | otherwise = noLoc (KindedTyVar (noLoc name) (synifyKindSig kind)) + where + kind = tyVarKind tv + name = getName tv --states of what to do with foralls: data SynifyTypeState @@ -360,6 +355,15 @@ data SynifyTypeState -- the defining class gets to quantify all its functions for free! +synifySigType :: SynifyTypeState -> Type -> LHsSigType Name +-- The empty binders is a bit suspicious; +-- what if the type has free variables? +synifySigType s ty = mkEmptyImplicitBndrs (synifyType s ty) + +synifySigWcType :: SynifyTypeState -> Type -> LHsSigWcType Name +-- Ditto (see synifySigType) +synifySigWcType s ty = mkEmptyImplicitBndrs (mkEmptyWildCardBndrs (synifyType s ty)) + synifyType :: SynifyTypeState -> Type -> LHsType Name synifyType _ (TyVarTy tv) = noLoc $ HsTyVar (getName tv) synifyType _ (TyConApp tc tys) @@ -398,11 +402,11 @@ synifyType _ (FunTy t1 t2) = let in noLoc $ HsFunTy s1 s2 synifyType s forallty@(ForAllTy _tv _ty) = let (tvs, ctx, tau) = tcSplitSigmaTy forallty - sPhi = HsQualTy { hst_ctxt = noLoc (synifyCtx ctx) - , hst_body = noLoc (synify WithinType tau) } + sPhi = HsQualTy { hst_ctxt = synifyCtx ctx + , hst_body = synifyType WithinType tau } in case s of DeleteTopLevelQuantification -> synifyType ImplicitizeForAll tau - WithinType -> noLoc $ HsForAllTy { hst_bndrs = synifyTyVars tvs + WithinType -> noLoc $ HsForAllTy { hst_bndrs = map synifyTyVar tvs , hst_body = noLoc sPhi } ImplicitizeForAll -> noLoc sPhi |