diff options
Diffstat (limited to 'compiler/GHC/Parser/Annotation.hs')
| -rw-r--r-- | compiler/GHC/Parser/Annotation.hs | 37 |
1 files changed, 20 insertions, 17 deletions
diff --git a/compiler/GHC/Parser/Annotation.hs b/compiler/GHC/Parser/Annotation.hs index b414e70be5..1692d394b5 100644 --- a/compiler/GHC/Parser/Annotation.hs +++ b/compiler/GHC/Parser/Annotation.hs @@ -394,22 +394,25 @@ instance Outputable EpaComment where -- The usual way an 'AddEpAnn' is created is using the 'mj' ("make -- jump") function, and then it can be inserted into the appropriate -- annotation. -data AddEpAnn = AddEpAnn AnnKeywordId EpaLocation deriving (Data,Show,Eq,Ord) - --- | The anchor for an @'AnnKeywordId'@. The Parser inserts the @'EpaSpan'@ --- variant, giving the exact location of the original item in the --- parsed source. This can be replaced by the @'EpaDelta'@ version, to --- provide a position for the item relative to the end of the previous --- item in the source. This is useful when editing an AST prior to --- exact printing the changed one. -data EpaLocation = EpaSpan RealSrcSpan - | EpaDelta DeltaPos - deriving (Data,Show,Eq,Ord) +data AddEpAnn = AddEpAnn AnnKeywordId EpaLocation deriving (Data,Eq,Ord) + +-- | The anchor for an @'AnnKeywordId'@. The Parser inserts the +-- @'EpaSpan'@ variant, giving the exact location of the original item +-- in the parsed source. This can be replaced by the @'EpaDelta'@ +-- version, to provide a position for the item relative to the end of +-- the previous item in the source. This is useful when editing an +-- AST prior to exact printing the changed one. The list of comments +-- in the @'EpaDelta'@ variant captures any comments between the prior +-- output and the thing being marked here, since we cannot otherwise +-- sort the relative order. +data EpaLocation = EpaSpan !RealSrcSpan + | EpaDelta !DeltaPos ![LEpaComment] + deriving (Data,Eq,Ord) -- | Tokens embedded in the AST have an EpaLocation, unless they come from -- generated code (e.g. by TH). data TokenLocation = NoTokenLoc | TokenLoc !EpaLocation - deriving (Data,Show,Eq,Ord) + deriving (Data,Eq,Ord) -- | Spacing between output items when exact printing. It captures -- the spacing from the current print position on the page to the @@ -444,7 +447,7 @@ getDeltaLine (DifferentLine r _) = r -- partial function is safe. epaLocationRealSrcSpan :: EpaLocation -> RealSrcSpan epaLocationRealSrcSpan (EpaSpan r) = r -epaLocationRealSrcSpan (EpaDelta _) = panic "epaLocationRealSrcSpan" +epaLocationRealSrcSpan (EpaDelta _ _) = panic "epaLocationRealSrcSpan" epaLocationFromSrcAnn :: SrcAnn ann -> EpaLocation epaLocationFromSrcAnn (SrcSpanAnn EpAnnNotUsed l) = EpaSpan (realSrcSpan l) @@ -452,7 +455,7 @@ epaLocationFromSrcAnn (SrcSpanAnn (EpAnn anc _ _) _) = EpaSpan (anchor anc) instance Outputable EpaLocation where ppr (EpaSpan r) = text "EpaSpan" <+> ppr r - ppr (EpaDelta d) = text "EpaDelta" <+> ppr d + ppr (EpaDelta d cs) = text "EpaDelta" <+> ppr d <+> ppr cs instance Outputable AddEpAnn where ppr (AddEpAnn kw ss) = text "AddEpAnn" <+> ppr kw <+> ppr ss @@ -631,7 +634,7 @@ data TrailingAnn = AddSemiAnn EpaLocation -- ^ Trailing ';' | AddCommaAnn EpaLocation -- ^ Trailing ',' | AddVbarAnn EpaLocation -- ^ Trailing '|' - deriving (Data,Show,Eq, Ord) + deriving (Data, Eq, Ord) instance Outputable TrailingAnn where ppr (AddSemiAnn ss) = text "AddSemiAnn" <+> ppr ss @@ -934,7 +937,7 @@ widenSpan s as = foldl combineSrcSpans s (go as) where go [] = [] go (AddEpAnn _ (EpaSpan s):rest) = RealSrcSpan s Strict.Nothing : go rest - go (AddEpAnn _ (EpaDelta _):rest) = go rest + go (AddEpAnn _ (EpaDelta _ _):rest) = go rest -- | The annotations need to all come after the anchor. Make sure -- this is the case. @@ -943,7 +946,7 @@ widenRealSpan s as = foldl combineRealSrcSpans s (go as) where go [] = [] go (AddEpAnn _ (EpaSpan s):rest) = s : go rest - go (AddEpAnn _ (EpaDelta _):rest) = go rest + go (AddEpAnn _ (EpaDelta _ _):rest) = go rest widenAnchor :: Anchor -> [AddEpAnn] -> Anchor widenAnchor (Anchor s op) as = Anchor (widenRealSpan s as) op |