From 87fbc11227347da805a3d2158d462514438ca742 Mon Sep 17 00:00:00 2001 From: Ryan Scott Date: Sun, 5 Apr 2020 11:48:39 -0400 Subject: Fix #1050 by filtering out invisible AppTy arguments This makes the `synifyType` case for `AppTy` more intelligent by taking into consideration the visibilities of each `AppTy` argument and filtering out any invisible arguments, as they aren't intended to be displayed in the source code. (See #1050 for an example of what can happen if you fail to filter these out.) Along the way, I noticed that a special `synifyType` case for `AppTy t1 (CoercionTy {})` could be consolidated with the case below it, so I took the opportunity to tidy this up. --- haddock-api/src/Haddock/Convert.hs | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'haddock-api') diff --git a/haddock-api/src/Haddock/Convert.hs b/haddock-api/src/Haddock/Convert.hs index d5fa3667..1a1e95bd 100644 --- a/haddock-api/src/Haddock/Convert.hs +++ b/haddock-api/src/Haddock/Convert.hs @@ -612,11 +612,14 @@ synifyType _ vs (TyConApp tc tys) in noLoc $ HsKindSig noExtField ty' full_kind' | otherwise = ty' -synifyType s vs (AppTy t1 (CoercionTy {})) = synifyType s vs t1 -synifyType _ vs (AppTy t1 t2) = let - s1 = synifyType WithinType vs t1 - s2 = synifyType WithinType vs t2 - in noLoc $ HsAppTy noExtField s1 s2 +synifyType _ vs ty@(AppTy {}) = let + (ty_head, ty_args) = splitAppTys ty + ty_head' = synifyType WithinType vs ty_head + ty_args' = map (synifyType WithinType vs) $ + filterOut isCoercionTy $ + filterByList (map isVisibleArgFlag $ appTyArgFlags ty_head ty_args) + ty_args + in foldl (\t1 t2 -> noLoc $ HsAppTy noExtField t1 t2) ty_head' ty_args' synifyType s vs funty@(FunTy InvisArg _ _) = synifyForAllType s Inferred vs funty synifyType _ vs (FunTy VisArg t1 t2) = let s1 = synifyType WithinType vs t1 -- cgit v1.2.3