diff options
Diffstat (limited to 'src/Haddock/Interface')
| -rw-r--r-- | src/Haddock/Interface/AttachInstances.hs | 61 |
1 files changed, 23 insertions, 38 deletions
diff --git a/src/Haddock/Interface/AttachInstances.hs b/src/Haddock/Interface/AttachInstances.hs index 9da78108..46451c5a 100644 --- a/src/Haddock/Interface/AttachInstances.hs +++ b/src/Haddock/Interface/AttachInstances.hs @@ -16,14 +16,14 @@ module Haddock.Interface.AttachInstances (attachInstances) where import Haddock.Types import Haddock.Convert -import qualified Data.Map as Map -import Data.Map (Map) import Data.List import GHC import Name import InstEnv import Class +import HscTypes (withSession, ioMsg) +import TcRnDriver (tcRnGetInfo) #if __GLASGOW_HASKELL__ >= 610 && __GHC_PATCHLEVEL__ >= 2 import TypeRep hiding (funTyConName) @@ -38,24 +38,26 @@ import FastString #define FSLIT(x) (mkFastString# (x#)) -attachInstances :: [Interface] -> [Name] -> [Interface] -attachInstances ifaces filterNames = map attach ifaces +attachInstances :: [Interface] -> Ghc [Interface] +attachInstances = mapM attach where - instMap = - fmap (map toHsInstHead . sortImage instHead) $ - collectInstances ifaces filterNames - - attach iface = iface { ifaceExportItems = newItems } - where - newItems = map attachExport (ifaceExportItems iface) - - attachExport (ExportDecl decl@(L _ (TyClD d)) doc subs _) - | isClassDecl d || isDataDecl d || isFamilyDecl d = - ExportDecl decl doc subs (case Map.lookup (tcdName d) instMap of - Nothing -> [] - Just instheads -> instheads) - attachExport export = export - + attach iface = do + newItems <- mapM attachExport $ ifaceExportItems iface + return $ iface { ifaceExportItems = newItems } + attachExport (ExportDecl decl@(L _ (TyClD d)) doc subs _) = do + mb_info <- getAllInfo (unLoc (tcdLName d)) + return $ ExportDecl decl doc subs $ case mb_info of + Just (_, _, instances) -> + map toHsInstHead . sortImage instHead . map instanceHead $ instances + Nothing -> + [] + attachExport export = return export + + +-- | Like GHC's getInfo but doesn't cut things out depending on the +-- interative context, which we don't set sufficiently anyway. +getAllInfo :: GhcMonad m => Name -> m (Maybe (TyThing,Fixity,[Instance])) +getAllInfo name = withSession $ \hsc_env -> ioMsg $ tcRnGetInfo hsc_env name -------------------------------------------------------------------------------- -- Collecting and sorting instances @@ -64,28 +66,11 @@ attachInstances ifaces filterNames = map attach ifaces -- | Simplified type for sorting types, ignoring qualification (not visible -- in Haddock output) and unifying special tycons with normal ones. +-- For the benefit of the user (looks nice and predictable) and the +-- tests (which prefer output to be deterministic). data SimpleType = SimpleType Name [SimpleType] deriving (Eq,Ord) -collectInstances - :: [Interface] - -> [Name] - -> Map Name [([TyVar], [PredType], Class, [Type])] -- maps class/type names to instances - -collectInstances ifaces _ -- filterNames - = Map.fromListWith (flip (++)) tyInstPairs `Map.union` - Map.fromListWith (flip (++)) classInstPairs - where - allInstances = concatMap ifaceInstances ifaces - classInstPairs = [ (is_cls inst, [instanceHead inst]) | - inst <- allInstances ] - -- unfinished filtering of internal instances - -- Just n <- nub (is_tcs inst) ] - -- n `elem` filterNames ] - tyInstPairs = [ (tycon, [instanceHead inst]) | inst <- allInstances, - Just tycon <- nub (is_tcs inst) ] - - -- TODO: should we support PredTy here? instHead :: ([TyVar], [PredType], Class, [Type]) -> ([Int], Name, [SimpleType]) instHead (_, _, cls, args) |