diff options
Diffstat (limited to 'compiler/GHC/Iface/Type.hs')
| -rw-r--r-- | compiler/GHC/Iface/Type.hs | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/compiler/GHC/Iface/Type.hs b/compiler/GHC/Iface/Type.hs index 2b45a712e6..1796539cd5 100644 --- a/compiler/GHC/Iface/Type.hs +++ b/compiler/GHC/Iface/Type.hs @@ -29,6 +29,7 @@ module GHC.Iface.Type ( IfaceTvBndr, IfaceIdBndr, IfaceTyConBinder, IfaceForAllSpecBndr, IfaceForAllBndr, ForAllTyFlag(..), FunTyFlag(..), ShowForAllFlag(..), + ShowSub(..), ShowHowMuch(..), AltPpr(..), mkIfaceForAllTvBndr, mkIfaceTyConKind, ifaceForAllSpecToBndrs, ifaceForAllSpecToBndr, @@ -1317,6 +1318,32 @@ pprIfaceForAllCoBndr (tv, kind_co) -- or when compiling with -fprint-explicit-foralls. data ShowForAllFlag = ShowForAllMust | ShowForAllWhen +data ShowSub + = ShowSub + { ss_how_much :: ShowHowMuch + , ss_forall :: ShowForAllFlag } + +-- See Note [Printing IfaceDecl binders] +-- The alternative pretty printer referred to in the note. +newtype AltPpr = AltPpr (Maybe (OccName -> SDoc)) + +data ShowHowMuch + = ShowHeader AltPpr -- ^Header information only, not rhs + | ShowSome [OccName] AltPpr + -- ^ Show only some sub-components. Specifically, + -- + -- [@\[\]@] Print all sub-components. + -- [@(n:ns)@] Print sub-component @n@ with @ShowSub = ns@; + -- elide other sub-components to @...@ + -- May 14: the list is max 1 element long at the moment + | ShowIface + -- ^Everything including GHC-internal information (used in --show-iface) + +instance Outputable ShowHowMuch where + ppr (ShowHeader _) = text "ShowHeader" + ppr ShowIface = text "ShowIface" + ppr (ShowSome occs _) = text "ShowSome" <+> ppr occs + pprIfaceSigmaType :: ShowForAllFlag -> IfaceType -> SDoc pprIfaceSigmaType show_forall ty = hideNonStandardTypes (ppr_sigma show_forall topPrec) ty |