Language.Haskell.GHC.ExactPrint.AnnotateTypes

annotate is a function which given a GHC AST fragment, constructs a syntax tree which indicates which annotations belong to each specific part of the fragment.

Delta and Print provide two interpreters for this structure. You should probably use those unless you know what you're doing!

The functor AnnotationF has a number of constructors which correspond to different sitations which annotations can arise. It is hoped that in future versions of GHC these can be simplified by making suitable modifications to the AST.

Documentation

data AnnotationF next where

MarkPrim

The main constructor. Marks that a specific AnnKeywordId could appear with an optional String which is used when printing.

MarkPPOptional

Used to flag elements, such as optional braces, that are not used in the pretty printer. This functions identically to MarkPrim for the other interpreters.

MarkEOF

Special constructor which marks the end of file marker.

MarkExternal

TODO

MarkOutside

A AnnKeywordId which is precisely located but not inside the current context. This is usually used to reassociated located RdrName which are more naturally associated with their parent than in their own annotation.

MarkInside

The dual of MarkOutside. If we wish to mark a non-separating comma or semi-colon then we must use this constructor.

MarkMany

Some syntax elements allow an arbritary number of puncuation marks without reflection in the AST. This construction greedily takes all of the specified AnnKeywordId.

MarkOffsetPrim

Some syntax elements have repeated AnnKeywordId which are seperated by different AnnKeywordId. Thus using MarkMany is unsuitable and instead we provide an index to specify which specific instance to choose each time.

WithAST

TODO

CountAnns

Sometimes the AST does not reflect the concrete source code and the only way to tell what the concrete source was is to count a certain kind of AnnKeywordId.

WithSortKey

There are many places where the syntactic ordering of elements is thrown away by the AST. This constructor captures the original ordering and reflects any changes in ordered as specified by the annSortKey field in Annotation.

SetLayoutFlag

It is important to know precisely where layout rules apply. This constructor wraps a computation to indicate that LayoutRules apply to the corresponding construct.

StoreOriginalSrcSpan

TODO

GetSrcSpanFromKw

TODO

StoreString

TODO

AnnotationsToComments

Used when the AST is sufficiently vague that there is no other option but to convert a fragment of source code into a comment. This means it is impossible to edit such a fragment but means that processing files with such fragments is still possible.

Constructors

MarkPrim :: AnnKeywordId -> Maybe String -> next -> AnnotationF next

MarkPPOptional :: AnnKeywordId -> Maybe String -> next -> AnnotationF next

MarkEOF :: next -> AnnotationF next

MarkExternal :: SrcSpan -> AnnKeywordId -> String -> next -> AnnotationF next

MarkInstead :: AnnKeywordId -> KeywordId -> next -> AnnotationF next

MarkOutside :: AnnKeywordId -> KeywordId -> next -> AnnotationF next

MarkInside :: AnnKeywordId -> next -> AnnotationF next

MarkMany :: AnnKeywordId -> next -> AnnotationF next

MarkManyOptional :: AnnKeywordId -> next -> AnnotationF next

MarkOffsetPrim :: AnnKeywordId -> Int -> Maybe String -> next -> AnnotationF next

MarkOffsetPrimOptional :: AnnKeywordId -> Int -> Maybe String -> next -> AnnotationF next

WithAST :: Data a => Located a -> Annotated b -> next -> AnnotationF next

CountAnns :: AnnKeywordId -> (Int -> next) -> AnnotationF next

WithSortKey :: [(SrcSpan, Annotated ())] -> next -> AnnotationF next

SetLayoutFlag :: Rigidity -> Annotated () -> next -> AnnotationF next

MarkAnnBeforeAnn :: AnnKeywordId -> AnnKeywordId -> next -> AnnotationF next

StoreOriginalSrcSpan :: SrcSpan -> AnnKey -> (AnnKey -> next) -> AnnotationF next

GetSrcSpanForKw :: SrcSpan -> AnnKeywordId -> (SrcSpan -> next) -> AnnotationF next

AnnotationsToComments :: [AnnKeywordId] -> next -> AnnotationF next

SetContextLevel :: Set AstContext -> Int -> Annotated () -> next -> AnnotationF next

UnsetContext :: AstContext -> Annotated () -> next -> AnnotationF next

IfInContext :: Set AstContext -> Annotated () -> Annotated () -> next -> AnnotationF next

WithSortKeyContexts :: ListContexts -> [(SrcSpan, Annotated ())] -> next -> AnnotationF next

TellContext :: Set AstContext -> next -> AnnotationF next

Instances

Functor AnnotationF

Methods

fmap :: (a -> b) -> AnnotationF a -> AnnotationF b

(<$) :: a -> AnnotationF b -> AnnotationF a

type Annotated = FreeT AnnotationF Identity

markEOF :: forall m. MonadFree AnnotationF m => m ()

markPrim :: forall m. MonadFree AnnotationF m => AnnKeywordId -> Maybe String -> m ()

markPPOptional :: forall m. MonadFree AnnotationF m => AnnKeywordId -> Maybe String -> m ()

markInstead :: forall m. MonadFree AnnotationF m => AnnKeywordId -> KeywordId -> m ()

markOutside :: forall m. MonadFree AnnotationF m => AnnKeywordId -> KeywordId -> m ()

markInside :: forall m. MonadFree AnnotationF m => AnnKeywordId -> m ()

markExternal :: forall m. MonadFree AnnotationF m => SrcSpan -> AnnKeywordId -> String -> m ()

markMany :: forall m. MonadFree AnnotationF m => AnnKeywordId -> m ()

markManyOptional :: forall m. MonadFree AnnotationF m => AnnKeywordId -> m ()

markOffsetPrim :: forall m. MonadFree AnnotationF m => AnnKeywordId -> Int -> Maybe String -> m ()

markOffsetPrimOptional :: forall m. MonadFree AnnotationF m => AnnKeywordId -> Int -> Maybe String -> m ()

countAnns :: forall m. MonadFree AnnotationF m => AnnKeywordId -> m Int

storeOriginalSrcSpan :: forall m. MonadFree AnnotationF m => SrcSpan -> AnnKey -> m AnnKey

getSrcSpanForKw :: forall m. MonadFree AnnotationF m => SrcSpan -> AnnKeywordId -> m SrcSpan

annotationsToComments :: forall m. MonadFree AnnotationF m => [AnnKeywordId] -> m ()

withSortKey :: forall m. MonadFree AnnotationF m => [(SrcSpan, Annotated ())] -> m ()

setContextLevel :: forall m. MonadFree AnnotationF m => Set AstContext -> Int -> Annotated () -> m ()

unsetContext :: forall m. MonadFree AnnotationF m => AstContext -> Annotated () -> m ()

ifInContext :: forall m. MonadFree AnnotationF m => Set AstContext -> Annotated () -> Annotated () -> m ()

withSortKeyContexts :: forall m. MonadFree AnnotationF m => ListContexts -> [(SrcSpan, Annotated ())] -> m ()

tellContext :: forall m. MonadFree AnnotationF m => Set AstContext -> m ()

markAnnBeforeAnn :: forall m. MonadFree AnnotationF m => AnnKeywordId -> AnnKeywordId -> m ()

setContext :: Set AstContext -> Annotated () -> Annotated ()

setLayoutFlag :: Annotated () -> Annotated ()

setRigidFlag :: Annotated () -> Annotated ()

inContext :: Set AstContext -> Annotated () -> Annotated ()

withAST :: Data a => Located a -> Annotated () -> Annotated ()

Main driver point for annotations.

mark :: AnnKeywordId -> Annotated ()

markOptional :: AnnKeywordId -> Annotated ()

markWithString :: AnnKeywordId -> String -> Annotated ()

markWithStringOptional :: AnnKeywordId -> String -> Annotated ()

markOffsetWithString :: AnnKeywordId -> Int -> String -> Annotated ()

markOffset :: AnnKeywordId -> Int -> Annotated ()

markOffsetOptional :: AnnKeywordId -> Int -> Annotated ()

markTrailingSemi :: Annotated ()

withLocated :: Data a => Located a -> (SrcSpan -> a -> Annotated ()) -> Annotated ()

markListIntercalateWithFun :: (t -> Annotated ()) -> [t] -> Annotated ()

markListIntercalateWithFunLevel :: (t -> Annotated ()) -> Int -> [t] -> Annotated ()

markListIntercalateWithFunLevelCtx :: (t -> Annotated ()) -> Int -> AstContext -> [t] -> Annotated ()

markListWithContextsFunction :: ListContexts -> (t -> Annotated ()) -> [t] -> Annotated ()

withSortKeyContextsHelper :: Monad m => (Annotated () -> m ()) -> ListContexts -> [(SrcSpan, Annotated ())] -> m ()

applyListAnnotations :: [(SrcSpan, Annotated ())] -> Annotated ()

applyListAnnotationsContexts :: ListContexts -> [(SrcSpan, Annotated ())] -> Annotated ()

applyListAnnotationsLayout :: [(SrcSpan, Annotated ())] -> Annotated ()

listContexts :: ListContexts

listContexts' :: ListContexts

markAnnOpen :: SourceText -> String -> Annotated ()

markSourceText :: SourceText -> String -> Annotated ()

markExternalSourceText :: SrcSpan -> SourceText -> String -> Annotated ()

sourceTextToString :: SourceText -> String -> String