Commit 66961dc8 authored by Alec Theriault's avatar Alec Theriault Committed by Ben Gamari

Haddock needs to pass visible modules for instance filtering

The GHC-side `getNameToInstancesIndex` filters out incorrectly some
instances because it is not aware of what modules are visible. Using
`runTcInteractive` means that `ie_visible` gets initialized to a one
module set containing some dummy GHCi module. This is clearly not the
module set we want to check against to see if a given orphan instance
is visible or not.

In fact, GHC has no way of knowing what we want that module set to be
since it doesn't know ahead of time which modules Haddock is making its
docs for. The fix is just to pass that set in as an argument.

Bumps haddock submodule.

Reviewers: bgamari

Reviewed By: bgamari

Subscribers: duog, alexbiehl, rwbarton, thomie, carter

Differential Revision:
parent 983e4919
......@@ -1244,12 +1244,15 @@ getGRE = withSession $ \hsc_env-> return $ ic_rn_gbl_env (hsc_IC hsc_env)
-- by 'Name'. Each name's lists will contain every instance in which that name
-- is mentioned in the instance head.
getNameToInstancesIndex :: GhcMonad m
=> m (Messages, Maybe (NameEnv ([ClsInst], [FamInst])))
getNameToInstancesIndex = do
=> [Module] -- ^ visible modules. An orphan instance will be returned if and
-- only it is visible from at least one module in the list.
-> m (Messages, Maybe (NameEnv ([ClsInst], [FamInst])))
getNameToInstancesIndex visible_mods = do
hsc_env <- getSession
liftIO $ runTcInteractive hsc_env $
do { loadUnqualIfaces hsc_env (hsc_IC hsc_env)
; InstEnvs {ie_global, ie_local, ie_visible} <- tcGetInstEnvs
; InstEnvs {ie_global, ie_local} <- tcGetInstEnvs
; let visible_mods' = mkModuleSet visible_mods
; (pkg_fie, home_fie) <- tcGetFamInstEnvs
-- We use Data.Sequence.Seq because we are creating left associated
-- mappends.
......@@ -1257,7 +1260,7 @@ getNameToInstancesIndex = do
; let cls_index = Map.fromListWith mappend
[ (n, Seq.singleton ispec)
| ispec <- instEnvElts ie_local ++ instEnvElts ie_global
, instIsVisible ie_visible ispec
, instIsVisible visible_mods' ispec
, n <- nameSetElemsStable $ orphNamesOfClsInst ispec
; let fam_index = Map.fromListWith mappend
Subproject commit 24841386cff6fdccc11accf9daa815c2c7444d65
Subproject commit dd80ae1773ea6aae48c3c5a899d510699783d6ee
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