ghc-7.10.1: The GHC API

Safe HaskellNone
LanguageHaskell2010

ApiAnnotation

Synopsis

Documentation

getAnnotation :: ApiAnns -> SrcSpan -> AnnKeywordId -> [SrcSpan] Source

Retrieve a list of annotation SrcSpans based on the SrcSpan of the annotated AST element, and the known type of the annotation.

getAndRemoveAnnotation :: ApiAnns -> SrcSpan -> AnnKeywordId -> ([SrcSpan], ApiAnns) Source

Retrieve a list of annotation SrcSpans based on the SrcSpan of the annotated AST element, and the known type of the annotation. The list is removed from the annotations.

getAnnotationComments :: ApiAnns -> SrcSpan -> [Located AnnotationComment] Source

Retrieve the comments allocated to the current SrcSpan

Note: A given SrcSpan may appear in multiple AST elements, beware of duplicates

getAndRemoveAnnotationComments :: ApiAnns -> SrcSpan -> ([Located AnnotationComment], ApiAnns) Source

Retrieve the comments allocated to the current SrcSpan, and remove them from the annotations

type ApiAnns = (Map ApiAnnKey [SrcSpan], Map SrcSpan [Located AnnotationComment]) Source

type ApiAnnKey = (SrcSpan, AnnKeywordId) Source

data AnnKeywordId Source

API Annotations exist so that tools can perform source to source conversions of Haskell code. They are used to keep track of the various syntactic keywords that are not captured in the existing AST.

The annotations, together with original source comments are made available in the pm_annotations field of ParsedModule. Comments are only retained if Opt_KeepRawTokenStream is set in DynFlags before parsing.

The wiki page describing this feature is https://ghc.haskell.org/trac/ghc/wiki/ApiAnnotations

Note: in general the names of these are taken from the corresponding token, unless otherwise noted See note [Api annotations] above for details of the usage

Constructors

AnnAs 
AnnAt 
AnnBang

!

AnnBackquote

'`'

AnnBy 
AnnCase

case or lambda case

AnnClass 
AnnClose

'#)' or '#-}' etc

AnnCloseC

'}'

AnnCloseP

')'

AnnCloseS

']'

AnnColon 
AnnComma

as a list separator

AnnCommaTuple

in a RdrName for a tuple

AnnDarrow

'=>'

AnnData 
AnnDcolon

'::'

AnnDefault 
AnnDeriving 
AnnDo 
AnnDot

.

AnnDotdot

'..'

AnnElse 
AnnEqual 
AnnExport 
AnnFamily 
AnnForall 
AnnForeign 
AnnFunId

for function name in matches where there are multiple equations for the function.

AnnGroup 
AnnHeader

for CType

AnnHiding 
AnnIf 
AnnImport 
AnnIn 
AnnInfix

'infix' or 'infixl' or 'infixr'

AnnInstance 
AnnLam 
AnnLarrow

'<-'

AnnLet 
AnnMdo 
AnnMinus

-

AnnModule 
AnnNewtype 
AnnOf 
AnnOpen

'(#' or '{-# LANGUAGE' etc

AnnOpenC

'{'

AnnOpenP

'('

AnnOpenS

'['

AnnPackageName 
AnnPattern 
AnnProc 
AnnQualified 
AnnRarrow

'->'

AnnRec 
AnnRole 
AnnSafe 
AnnSemi

';'

AnnStatic

static

AnnThen 
AnnTilde

'~'

AnnTildehsh

~#

AnnType 
AnnUnit

'()' for types

AnnUsing 
AnnVal

e.g. INTEGER

AnnValStr

String value, will need quotes when output

AnnVbar

'|'

AnnWhere 
Annlarrowtail

-<

Annrarrowtail

'->'

AnnLarrowtail

-<<

AnnRarrowtail

>>-

AnnEofPos 

Instances

data AnnotationComment Source

Constructors

AnnDocCommentNext String

something beginning '-- |'

AnnDocCommentPrev String

something beginning '-- ^'

AnnDocCommentNamed String

something beginning '-- $'

AnnDocSection Int String

a section heading

AnnDocOptions String

doc options (prune, ignore-exports, etc)

AnnDocOptionsOld String

doc options declared "-- # ..."-style

AnnLineComment String

comment starting by "--"

AnnBlockComment String

comment in {- -}

Instances

type LRdrName = Located RdrName Source