Remove unused HasHeaderMap (#5175)

It is updated by some readers, but never actually used.

7 files changed, 4 insertions, 50 deletions

diff --git a/src/Text/Pandoc/Parsing.hs b/src/Text/Pandoc/Parsing.hs
index 20c9bdb9b..bc4985168 100644
--- a/src/Text/Pandoc/Parsing.hs
+++ b/src/Text/Pandoc/Parsing.hs
@@ -93,7 +93,6 @@ module Text.Pandoc.Parsing ( takeWhileP,
                              reportLogMessages,
                              ParserState (..),
                              HasReaderOptions (..),
-                             HasHeaderMap (..),
                              HasIdentifierList (..),
                              HasMacros (..),
                              HasLogMessages (..),
@@ -1079,7 +1078,6 @@ data ParserState = ParserState
       stateMeta'             :: F Meta,        -- ^ Document metadata
       stateCitations         :: M.Map String String, -- ^ RST-style citations
       stateHeaderTable       :: [HeaderType],  -- ^ Ordered list of header types used
-      stateHeaders           :: M.Map Inlines String, -- ^ List of headers and ids (used for implicit ref links)
       stateIdentifiers       :: Set.Set String, -- ^ Header identifiers used
       stateNextExample       :: Int,           -- ^ Number of next example
       stateExamples          :: M.Map String Int, -- ^ Map from example labels to numbers
@@ -1129,15 +1127,6 @@ instance Monad m => HasQuoteContext ParserState m where
     setState newState { stateQuoteContext = oldQuoteContext }
     return result
 
-class HasHeaderMap st where
-  extractHeaderMap  :: st -> M.Map Inlines String
-  updateHeaderMap   :: (M.Map Inlines String -> M.Map Inlines String) ->
-                       st -> st
-
-instance HasHeaderMap ParserState where
-  extractHeaderMap     = stateHeaders
-  updateHeaderMap f st = st{ stateHeaders = f $ stateHeaders st }
-
 class HasIdentifierList st where
   extractIdentifierList  :: st -> Set.Set String
   updateIdentifierList   :: (Set.Set String -> Set.Set String) -> st -> st
@@ -1198,7 +1187,6 @@ defaultParserState =
                   stateMeta'           = return nullMeta,
                   stateCitations       = M.empty,
                   stateHeaderTable     = [],
-                  stateHeaders         = M.empty,
                   stateIdentifiers     = Set.empty,
                   stateNextExample     = 1,
                   stateExamples        = M.empty,
@@ -1283,12 +1271,11 @@ type SubstTable = M.Map Key Inlines
 --  is encountered that duplicates an earlier identifier
 --  (explicit or automatically generated).
 registerHeader :: (Stream s m a, HasReaderOptions st,
-                    HasHeaderMap st, HasLogMessages st, HasIdentifierList st)
+                   HasLogMessages st, HasIdentifierList st)
                => Attr -> Inlines -> ParserT s st m Attr
 registerHeader (ident,classes,kvs) header' = do
   ids <- extractIdentifierList <$> getState
   exts <- getOption readerExtensions
-  let insert' = M.insertWith (\_new old -> old)
   if null ident && Ext_auto_identifiers `extensionEnabled` exts
      then do
        let id' = uniqueIdent exts (B.toList header') ids
@@ -1297,7 +1284,6 @@ registerHeader (ident,classes,kvs) header' = do
                      else id'
        updateState $ updateIdentifierList $ Set.insert id'
        updateState $ updateIdentifierList $ Set.insert id''
-       updateState $ updateHeaderMap $ insert' header' id'
        return (id'',classes,kvs)
      else do
         unless (null ident) $ do
@@ -1305,7 +1291,6 @@ registerHeader (ident,classes,kvs) header' = do
             pos <- getPosition
             logMessage $ DuplicateIdentifier ident pos
           updateState $ updateIdentifierList $ Set.insert ident
-          updateState $ updateHeaderMap $ insert' header' ident
         return (ident,classes,kvs)
 
 smartPunctuation :: (HasReaderOptions st, HasLastStrPosition st, HasQuoteContext st m, Stream s m Char)
diff --git a/src/Text/Pandoc/Readers/HTML.hs b/src/Text/Pandoc/Readers/HTML.hs
index b27840eb5..8d3c1abb4 100644
--- a/src/Text/Pandoc/Readers/HTML.hs
+++ b/src/Text/Pandoc/Readers/HTML.hs
@@ -105,7 +105,7 @@ readHtml opts inp = do
   result <- flip runReaderT def $
        runParserT parseDoc
        (HTMLState def{ stateOptions = opts }
-         [] Nothing Set.empty M.empty [] M.empty)
+         [] Nothing Set.empty [] M.empty)
        "source" tags
   case result of
     Right doc -> return doc
@@ -126,7 +126,6 @@ data HTMLState =
      noteTable   :: [(String, Blocks)],
      baseHref    :: Maybe URI,
      identifiers :: Set.Set String,
-     headerMap   :: M.Map Inlines String,
      logMessages :: [LogMessage],
      macros      :: M.Map Text Macro
   }
@@ -1295,10 +1294,6 @@ instance HasIdentifierList HTMLState where
   extractIdentifierList = identifiers
   updateIdentifierList f s = s{ identifiers = f (identifiers s) }
 
-instance HasHeaderMap HTMLState where
-  extractHeaderMap = headerMap
-  updateHeaderMap  f s = s{ headerMap = f (headerMap s) }
-
 instance HasLogMessages HTMLState where
   addLogMessage m s = s{ logMessages = m : logMessages s }
   getLogMessages = reverse . logMessages
diff --git a/src/Text/Pandoc/Readers/LaTeX/Parsing.hs b/src/Text/Pandoc/Readers/LaTeX/Parsing.hs
index c5385bedc..9437c23d9 100644
--- a/src/Text/Pandoc/Readers/LaTeX/Parsing.hs
+++ b/src/Text/Pandoc/Readers/LaTeX/Parsing.hs
@@ -131,7 +131,6 @@ data LaTeXState = LaTeXState{ sOptions       :: ReaderOptions
                             , sQuoteContext  :: QuoteContext
                             , sMacros        :: M.Map Text Macro
                             , sContainers    :: [String]
-                            , sHeaders       :: M.Map Inlines String
                             , sLogMessages   :: [LogMessage]
                             , sIdentifiers   :: Set.Set String
                             , sVerbatimMode  :: Bool
@@ -153,7 +152,6 @@ defaultLaTeXState = LaTeXState{ sOptions       = def
                               , sQuoteContext  = NoQuote
                               , sMacros        = M.empty
                               , sContainers    = []
-                              , sHeaders       = M.empty
                               , sLogMessages   = []
                               , sIdentifiers   = Set.empty
                               , sVerbatimMode  = False
@@ -192,10 +190,6 @@ instance HasIncludeFiles LaTeXState where
   addIncludeFile f s = s{ sContainers = f : sContainers s }
   dropLatestIncludeFile s = s { sContainers = drop 1 $ sContainers s }
 
-instance HasHeaderMap LaTeXState where
-  extractHeaderMap     = sHeaders
-  updateHeaderMap f st = st{ sHeaders = f $ sHeaders st }
-
 instance HasMacros LaTeXState where
   extractMacros  st  = sMacros st
   updateMacros f st  = st{ sMacros = f (sMacros st) }
diff --git a/src/Text/Pandoc/Readers/MediaWiki.hs b/src/Text/Pandoc/Readers/MediaWiki.hs
index ff66da0b2..c7a3bcfc7 100644
--- a/src/Text/Pandoc/Readers/MediaWiki.hs
+++ b/src/Text/Pandoc/Readers/MediaWiki.hs
@@ -43,7 +43,6 @@ import Control.Monad.Except (throwError)
 import Data.Char (isDigit, isSpace)
 import qualified Data.Foldable as F
 import Data.List (intercalate, intersperse, isPrefixOf)
-import qualified Data.Map as M
 import Data.Maybe (fromMaybe, maybeToList)
 import Data.Sequence (ViewL (..), viewl, (<|))
 import qualified Data.Set as Set
@@ -72,7 +71,6 @@ readMediaWiki opts s = do
                                             , mwMaxNestingLevel = 4
                                             , mwNextLinkNumber  = 1
                                             , mwCategoryLinks = []
-                                            , mwHeaderMap = M.empty
                                             , mwIdentifierList = Set.empty
                                             , mwLogMessages = []
                                             , mwInTT = False
@@ -86,7 +84,6 @@ data MWState = MWState { mwOptions         :: ReaderOptions
                        , mwMaxNestingLevel :: Int
                        , mwNextLinkNumber  :: Int
                        , mwCategoryLinks   :: [Inlines]
-                       , mwHeaderMap       :: M.Map Inlines String
                        , mwIdentifierList  :: Set.Set String
                        , mwLogMessages     :: [LogMessage]
                        , mwInTT            :: Bool
@@ -97,10 +94,6 @@ type MWParser m = ParserT [Char] MWState m
 instance HasReaderOptions MWState where
   extractReaderOptions = mwOptions
 
-instance HasHeaderMap MWState where
-  extractHeaderMap     = mwHeaderMap
-  updateHeaderMap f st = st{ mwHeaderMap = f $ mwHeaderMap st }
-
 instance HasIdentifierList MWState where
   extractIdentifierList     = mwIdentifierList
   updateIdentifierList f st = st{ mwIdentifierList = f $ mwIdentifierList st }
diff --git a/src/Text/Pandoc/Readers/Muse.hs b/src/Text/Pandoc/Readers/Muse.hs
index 70cd47b58..42d9b539b 100644
--- a/src/Text/Pandoc/Readers/Muse.hs
+++ b/src/Text/Pandoc/Readers/Muse.hs
@@ -74,7 +74,6 @@ type F = Future MuseState
 
 data MuseState = MuseState { museMeta :: F Meta -- ^ Document metadata
                            , museOptions :: ReaderOptions
-                           , museHeaders :: M.Map Inlines String -- ^ List of headers and ids (used for implicit ref links)
                            , museIdentifierList :: Set.Set String
                            , museLastSpacePos :: Maybe SourcePos -- ^ Position after last space or newline parsed
                            , museLastStrPos :: Maybe SourcePos -- ^ Position after last str parsed
@@ -85,7 +84,6 @@ data MuseState = MuseState { museMeta :: F Meta -- ^ Document metadata
 instance Default MuseState where
   def = MuseState { museMeta = return nullMeta
                   , museOptions = def
-                  , museHeaders = M.empty
                   , museIdentifierList = Set.empty
                   , museLastStrPos = Nothing
                   , museLastSpacePos = Nothing
@@ -108,10 +106,6 @@ type MuseParser m = ParserT Text MuseState (ReaderT MuseEnv m)
 instance HasReaderOptions MuseState where
   extractReaderOptions = museOptions
 
-instance HasHeaderMap MuseState where
-  extractHeaderMap     = museHeaders
-  updateHeaderMap f st = st{ museHeaders = f $ museHeaders st }
-
 instance HasIdentifierList MuseState where
   extractIdentifierList     = museIdentifierList
   updateIdentifierList f st = st{ museIdentifierList = f $ museIdentifierList st }
diff --git a/src/Text/Pandoc/Readers/Org/ParserState.hs b/src/Text/Pandoc/Readers/Org/ParserState.hs
index 59478256f..d57b848da 100644
--- a/src/Text/Pandoc/Readers/Org/ParserState.hs
+++ b/src/Text/Pandoc/Readers/Org/ParserState.hs
@@ -64,11 +64,11 @@ import qualified Data.Map as M
 import qualified Data.Set as Set
 import Data.Text (Text)
 
-import Text.Pandoc.Builder (Blocks, Inlines)
+import Text.Pandoc.Builder (Blocks)
 import Text.Pandoc.Definition (Meta (..), nullMeta)
 import Text.Pandoc.Logging
 import Text.Pandoc.Options (ReaderOptions (..))
-import Text.Pandoc.Parsing (Future, HasHeaderMap (..), HasIdentifierList (..),
+import Text.Pandoc.Parsing (Future, HasIdentifierList (..),
                             HasIncludeFiles (..), HasLastStrPosition (..),
                             HasLogMessages (..), HasMacros (..),
                             HasQuoteContext (..), HasReaderOptions (..),
@@ -120,7 +120,6 @@ data OrgParserState = OrgParserState
   , orgStateExcludedTags         :: Set.Set Tag
   , orgStateExcludedTagsChanged  :: Bool
   , orgStateExportSettings       :: ExportSettings
-  , orgStateHeaderMap            :: M.Map Inlines String
   , orgStateIdentifiers          :: Set.Set String
   , orgStateIncludeFiles         :: [String]
   , orgStateLastForbiddenCharPos :: Maybe SourcePos
@@ -160,10 +159,6 @@ instance HasIdentifierList OrgParserState where
   extractIdentifierList = orgStateIdentifiers
   updateIdentifierList f s = s{ orgStateIdentifiers = f (orgStateIdentifiers s) }
 
-instance HasHeaderMap OrgParserState where
-  extractHeaderMap = orgStateHeaderMap
-  updateHeaderMap  f s = s{ orgStateHeaderMap = f (orgStateHeaderMap s) }
-
 instance HasLogMessages OrgParserState where
   addLogMessage msg st = st{ orgLogMessages = msg : orgLogMessages st }
   getLogMessages st = reverse $ orgLogMessages st
@@ -191,7 +186,6 @@ defaultOrgParserState = OrgParserState
   , orgStateExportSettings = def
   , orgStateExcludedTags = Set.singleton $ Tag "noexport"
   , orgStateExcludedTagsChanged = False
-  , orgStateHeaderMap = M.empty
   , orgStateIdentifiers = Set.empty
   , orgStateIncludeFiles = []
   , orgStateLastForbiddenCharPos = Nothing
diff --git a/src/Text/Pandoc/Readers/RST.hs b/src/Text/Pandoc/Readers/RST.hs
index 1938ca171..c14628c70 100644
--- a/src/Text/Pandoc/Readers/RST.hs
+++ b/src/Text/Pandoc/Readers/RST.hs
@@ -179,7 +179,6 @@ parseRST = do
   st' <- getState
   let reversedNotes = stateNotes st'
   updateState $ \s -> s { stateNotes = reverse reversedNotes
-                        , stateHeaders = mempty
                         , stateIdentifiers = mempty }
   -- now parse it for real...
   blocks <- B.toList <$> parseBlocks