packages feed

marxup (empty) → 1.0.0

raw patch · 11 files changed

+1229/−0 lines, 11 filesdep +basedep +filepathdep +labeled-treesetup-changed

Dependencies added: base, filepath, labeled-tree, mtl, parsec, pretty

Files

+ LICENSE view
@@ -0,0 +1,340 @@+		    GNU GENERAL PUBLIC LICENSE+		       Version 2, June 1991++ Copyright (C) 1989, 1991 Free Software Foundation, Inc.+     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA+ Everyone is permitted to copy and distribute verbatim copies+ of this license document, but changing it is not allowed.++			    Preamble++  The licenses for most software are designed to take away your+freedom to share and change it.  By contrast, the GNU General Public+License is intended to guarantee your freedom to share and change free+software--to make sure the software is free for all its users.  This+General Public License applies to most of the Free Software+Foundation's software and to any other program whose authors commit to+using it.  (Some other Free Software Foundation software is covered by+the GNU Library General Public License instead.)  You can apply it to+your programs, too.++  When we speak of free software, we are referring to freedom, not+price.  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+ Main.hs view
@@ -0,0 +1,171 @@+import Text.ParserCombinators.Parsec+-- import Text.PrettyPrint.HughesPJ hiding (char)+-- import qualified Text.PrettyPrint.HughesPJ as O+++import Data.Char+import Control.Applicative hiding (many, (<|>))+import Data.List+import System.IO+import System.Environment+import Control.Monad++-- todo: parse strings inside haskell code+-- todo: output line directives.++instance Applicative (GenParser Char st) where+    (<*>) = ap+    pure = return++----------+    +type Doc = String -> String+(<>) = (.)+text s = (s ++)+x <+> y =  x <> text " " <> y +oChar c = (c:)+parens s = oChar '(' <> s <> oChar ')'+braces s = oChar '{' <> s <> oChar '}'+brackets s = oChar '[' <> s <> oChar ']'+doubleQuotes s = oChar '"' <> s <> oChar '"'++oEmpty = id+int x = text $ show x+hcat :: [Doc] -> Doc+hcat = foldr (<>) oEmpty+punctuate t = map (<> t)+render x = x ""++------------------------------------------+-- Output combinators+    +oPos :: SourcePos -> Doc+oPos p = text "{-# LINE" <+> int (sourceLine p) <+> text (show (sourceName p)) <+> text "#-}"+    +oText :: String -> Doc+oText x = text "textual" <+> text (show x)++oMappend :: [Doc] -> Doc+oMappend [] = text "(return ())"+oMappend [x] = parens x+oMappend l = text "do" <+> braces (text "rec" <+> braces (hcat (punctuate (text ";") binds)) <> text ";" <> ret)+  where binds = init l+        ret = last l+             ++oBraces :: Doc -> Doc+oBraces x = oText "{" <> text "*>" <> x <> text "<*" <>  oText "}"+++----------------------------------------------+-- Parsing combinators+pChunk :: String -> Parser String+pChunk stops = many1 (noneOf stops)++pWPos :: Parser Doc +pWPos = do +  char '\n'+  pos <- getPosition+  return $ oPos pos <> text "\n"++pTextChunk = (oText <$> pChunk "\n{}@")++pHaskChunk = (text <$> many1 (noneOf "\n\"{}[]()@" <|> try (char '@' <* notFollowedBy (oneOf "[({\""))))++pHaskLn = pWPos -- before each newline, tell GHC where we are.++pTextLn = do+    (oText "\n" <>) <$> pWPos +  -- add code to output a newline; and insert a newline in the code.+  ++pQuote = do+  try (string "@\"")+  d <- pInText (string "@\"")+  return $ parens d++box x = [x]++pString = do+  char '"'+  result <- many (string "\\\"" <|> pChunk ['"'])+  char '"'+  return $ doubleQuotes . hcat . map text $ result++-- | Parse some Haskell code with markup inside. +pHask = hcat <$> many ((brackets <$> pArg "[]") <|> +                       (braces   <$> pArg "{}") <|>+                       (parens   <$> pArg "()") <|> pQuote <|> pString <|> pHaskChunk <|> pHaskLn)++-- | Parse a text argument to an element+pTextArg :: Parser Doc+pTextArg = do+  char '{' +  result <- pInText (char '}')+  return result+++pInText :: Parser a -> Parser Doc+pInText end = oMappend <$> manyTill (pTextChunk <|> pTextLn <|> pElement <|> (oBraces <$> pTextArg)) (try end)++pArg :: String -> Parser Doc+pArg [open,close] = do +  char open+  result <- pHask+  char close+  return result++pArg1 [open,close] = do+  r <- pArg [open,close]+  return $ oChar open <> r <> oChar close++isIdentChar x = isAlphaNum x || x == '\''++-- | Either @fctName or @result<-fctName+pFctName :: Parser (Maybe Doc, Doc)+pFctName = do +  x <- try (char '@' >> satisfy isIdentChar) -- this is to clash with @"+  xs' <- many1 (satisfy isIdentChar)+  let xs = x : xs'+  ys <- option Nothing (Just <$> (try (string "<-") >> many1 (satisfy isIdentChar)))+  return $ case ys of+    Nothing -> (Nothing, text xs)+    Just ys -> (Just (text xs), text ys)++pFct = (Nothing,) <$> parens <$> +          (try (string "@{") *> pHask <* char '}')++pElement :: Parser Doc+pElement = do+  (result,function) <- pFctName <|> pFct+  args <- many (pArg "()" <|> pTextArg)+  let binder = maybe oEmpty (<+> text "<-") result+  return $ binder <> text "element" <+> parens (function <+> (hcat $ fmap parens args))+{-+pTop :: Parser Doc+pTop = do+  t <- pInText+  return (text "import Text" $$+          text "main =" <+> t)+-}+{-+main = do+  p <- parseFromFile pTop "Text.ths"+  case p of +    Left err -> hPutStrLn stderr $ show err+    Right res -> putStrLn $ render res+  -}++main :: IO ()+main = do+  x : y : z : _ <- getArgs+  putStrLn x+  putStrLn y+  putStrLn z+  p <- parseFromFile pHask y+  case p of +    Left err -> do+           hPutStrLn stderr $ show err+    Right res -> writeFile z $ +                    render res+
+ MarXup/Beamer.hs view
@@ -0,0 +1,29 @@+{-# LANGUAGE OverloadedStrings #-}+module MarXup.Beamer where++import Control.Applicative+import Data.Monoid+import MarXup.Tex++usetheme = cmd "usetheme" . tex++frame tit bod = env "frame" $ do+  cmd "frametitle" tit+  bod+  +pause :: TeX+pause = cmd "pause"$  mempty++note = cmd "note"++{-+preamble :: Tex ()+preamble = do +  usepackage [] "bbm"+  usetheme "Malmoe"+  +  title $ tex "Elements of Parametricity and Computational Irrelevance" +  cmd' "author" ["JP Bernardy"] $ tex "Jean-Philippe Bernardy"+  cmd "institute" $ tex "Chalmers University of Technology and University of Gothenburg"+  cmd "date" $ cmd "today" mempty+-}
+ MarXup/DerivationTrees.hs view
@@ -0,0 +1,226 @@+{-# LANGUAGE DisambiguateRecordFields, NamedFieldPuns, RecordWildCards, PostfixOperators, LiberalTypeSynonyms, TypeOperators, OverloadedStrings #-}++module MarXup.DerivationTrees (+-- * Basics+module Data.Monoid,+module Data.LabeledTree,++-- * Derivation' building+-- axiom, rule, etc, aborted, +emptyDrv, haltDrv, haltDrv', abortDrv, delayPre, +dummy, rule, Derivation, Premise, Rule(..), ++-- * Links+Alignment(..), LineStyle(..),defaultLink,Link(..),++-- * Figure building+Figure(..),++-- * Engine+derivationTree++) where++-- import DerivationTrees.Basics+import Data.List+import Data.Traversable hiding (mapM)+import Control.Monad.Writer +import Control.Monad.State +import Control.Applicative +import System.IO.Unsafe+import Data.LabeledTree+-- import Control.Applicative.State+import Data.Monoid+import MarXup.Tex hiding (label)+import MarXup.MetaPost++------------------+--- Basics++data LineStyle = None | Simple | Double | Dotted | Dashed | Waved | TeXDotted +  deriving (Enum,Show)++data Link = Link {label :: Tex (), linkStyle :: LineStyle, align :: Alignment, steps :: Int}  -- ^ Regular link+          | Detached {label :: Tex ()}               -- ^ Detach the derivation as another figure+          | Delayed {align :: Alignment} -- ^ automatic delaying+-- deriving Show++defaultLink :: Link+defaultLink = Link mempty Dotted CenterA 0++data Alignment = LeftA | CenterA | RightA+instance Show Alignment where    +    show LeftA = "l"+    show CenterA = "c"+    show RightA = "r"+++-------------------++data Rule tag = Rule {tag :: tag, ruleStyle :: LineStyle, delimiter :: Tex (), ruleLabel :: Tex (), conclusion :: Tex ()}+--  deriving Show++{-+instance Monoid t => Applicative (Writer t) where+    pure = return+    (<*>) = ap+-}++type Premise = Link ::> Derivation' ()+type Derivation' tag = Tree Link (Rule tag) +type Derivation = Derivation' ()++data Figure tag = Figure {figureTag :: Label, contents :: Derivation' tag}++------------------------------------------------------------+-- Phase 1: Detach++type Detach x = x -> WriterT [Figure ()] Tex x++detachP :: Detach Premise+detachP (Detached{..} ::> d) = do+  d'@(Node r ps) <- detachD d+  figureTag <- lift $ newLabel +  tell [Figure {contents = Node r {delimiter = label} ps,..}]+  return $ (defaultLink ::> haltDrv label d)+detachP (l ::> d) = (l ::>) <$> detachD d++detachD :: Detach Derivation+detachD (Node n ps) = Node n <$> for ps detachP++detachF :: Figure () -> WriterT [Figure ()] Tex ()+detachF Figure{..} = do+  contents <- detachD contents+  tell [Figure{..}]++detachTop :: [Figure ()] -> Tex [Figure ()]+detachTop fs = do +  figs <- runWriterT $ for fs detachF+  return $ snd $ figs++--------------------------------------------------+-- Phase 2: Delay++insertAt n x xs = take n xs ++ x : drop n xs++rm idx [] = []+rm 0 (x:xs) = xs+rm n (x:xs) = x : rm (n-1) xs++depth (Detached{} ::> _) = 2+depth (Link{steps} ::> Node _ ps) = 1 + steps + maximum (0 : map depth ps)++isDelayed :: Premise -> Bool+isDelayed (Delayed{} ::> _) = True+isDelayed _ = False++delayPre a s (Link {..} ::> j) = Link {steps = s, align = a, ..} ::> j++delayD :: Derivation -> Derivation+delayD (Node r ps0) = Node r (map delayP ps)+    where ps = fmap (fmap delayD) ps0+          ps' = filter (not . isDelayed) ps+          delayP (Delayed{..} ::> d) = Link{..} ::> d+             where steps = 1 + maximum (0 : map depth ps')+                   label = mempty+                   linkStyle = Dotted+          delayP p = p++delayF :: Figure () -> Figure ()+delayF (Figure{..}) = Figure{contents = delayD contents,..}++delayTop = map delayF++++---------------------------------------------------------+-- Phase 3: Tag++type Tag x = x () -> Tex (x Int)++tagify :: Tag Rule+tagify (Rule {..}) = do+  tag <- newLabel+  return $ Rule {..}++tagifyFig :: Tag Figure+tagifyFig (Figure {..}) = Figure figureTag <$> traverse tagify contents++tagifyTop :: [Figure ()] -> Tex [Figure Int]+tagifyTop = mapM tagifyFig++----------------------------------------------------------+-- Phase 4: Texify++mpQuote :: Tex () -> Tex ()+mpQuote t = Tex "\"" >> t >> Tex "\""++mkTuple :: [Tex ()] -> Tex ()+mkTuple l = Tex " (" >> sequence_ (intersperse "," l) >> Tex ") "++link (Link {..} ::> Node (Rule{tag}) _) +    | steps == 0 = sho tag+    | otherwise = Tex "MVD " >> sho tag >> Tex " " >>+                  mkTuple [sho steps,sho "",mpQuote label,sho align,sho (fromEnum linkStyle)]++type Stringize x = x Int -> Tex ()++stringize :: Derivation' Label -> Tex ()+stringize (Node Rule {tag = t, ..} premises) = do+  traverse (traverse stringize) premises+  Tex "jgm " >> reference t >> Tex " " >> mpQuote conclusion >> Tex ";\n"+  Tex "Nfr " >> reference t >> mkTuple (map link premises) >> Tex " " >>+                     mkTuple [mpQuote ruleLabel,mpQuote delimiter,mpQuote (Tex ""),sho (fromEnum ruleStyle)] >> Tex ";\n"++stringizeFig :: Figure Label -> Tex () +stringizeFig (Figure {..}) = metapostFigure figureTag $ do+  stringize contents+  texLn "draw drv_tree;"+  ++------------------------------------------+-- Pipeline++derivationTree :: Derivation -> Tex Label+derivationTree j = do +  f <- newLabel+  a <- delayTop <$> detachTop [Figure f j]+  bz <- tagifyTop a   +  Metapost $ mapM stringizeFig bz+  cmd "includegraphics" (MPFigure f)+  return f++-----------------------++rule ruleLabel conclusion = Rule {tag = (), delimiter = mempty, ruleStyle = Simple, ..}++dummy :: Rule ()+dummy = (rule mempty mempty) {ruleStyle = None}+emptyDrv = Node dummy []++abortDrv (Node Rule {..} _) = Node Rule {ruleStyle = Waved, ..} []++-- | Used when the rest of the derivation is known.+haltDrv' :: Tex () -> Derivation -> Derivation+haltDrv' tex (Node r _) = Node r {ruleStyle = None} +     [defaultLink {linkStyle = TeXDotted, steps = 1, label = tex} ::> emptyDrv]++-- | More compact variant+haltDrv :: Tex () -> Derivation -> Derivation+haltDrv t (Node r _) = Node r [defaultLink ::> Node dummy {conclusion = cmd "vdots" nil >> cmd "hspace" (Tex "2pt") >> t} []]+++{-------------------------+brace :: TeX -> TeX+brace (TeX x) = TeX $ '{' : x ++ ['}']+paren (TeX x) = TeX $ '(' : x ++ [')']+brack (TeX x) = TeX $ "[" ++ x ++ "]"++tex :: String -> [TeX] -> TeX+tex macro args = TeX ('\\' : macro) <> mconcat (map brace args)+text x = tex "text" [TeX x]++f ! x = brace f <> TeX "_" <> brace x+++-}
+ MarXup/Latex.hs view
@@ -0,0 +1,126 @@+{-# LANGUAGE OverloadedStrings #-}+module MarXup.Latex where++import Control.Applicative+import MarXup.Tex+import MarXup.MetaPost+import Data.List (intersperse)+import Data.Monoid++-- Separate the arguments with '\\'+mkrows :: [TeX] -> TeX+mkrows ls = sequence_ $ intersperse newline ls ++-- Separate the arguments with '&'+mkcols = sequence_ . intersperse newcol++vspace = cmd "vspace"+title = cmd "title"++newline = backslash <> backslash+newcol = tex "&"+newpara = texLines ["",""]++maketitle :: Tex ()+maketitle = cmd "maketitle" $ return ()++ldots = cmd "ldots" (return ())++section s = +  do cmd "section" s+     label++subsection s = +  do cmd "subsection" s+     label++color :: String -> Tex a -> Tex a+color col bod = do +  [_,x] <- cmdn' "textcolor" [] [tex col >> return undefined, bod]+  return x++----------------+-- Preamble stuff++usepackage opts name = cmd' "usepackage" opts (Tex name)++stdPreamble = do +  usepackage [] "graphicx"+  usepackage ["mathletters"] "ucs"+  usepackage ["utf8x"] "inputenc"+  return ()++latexDocument :: String -> [String] -> Tex a -> Tex a -> Tex ()+latexDocument docClass options pre body = do+   preamble+   Metapost $ metaPostPreamble preamble+   env "document" body+   Metapost $ metaPostEpilogue+ where +   preamble = do+     cmd' "documentclass" options (Tex docClass)+     pre+         ++----------+-- Fonts++sf, em :: Tex a -> Tex a+sf = cmd "textsf"+em = cmd "emph"++----------+-- Math++align  = env "align*" . mkrows . map mkcols ++block  bod = do+  cmdn' "begin" [] [tex "array", tex "l"]+  mkrows $ bod+  cmdn' "end" [] [tex "array"]++math = cmd "ensuremath"+mbox = cmd "mbox"++displayMath body = Tex "\\[" *> body <* Tex "\\]"++paren bod = do+  tex "("+  bod+  tex ")"++brack bod = do+  tex "["+  bod+  tex "]"++brac bod = do+  backslash >> tex "{"+  bod+  backslash >> tex "}"+++mathsf = cmd "mathsf"++instance Eq TeX where+instance Show TeX where+  ++instance Fractional TeX where+    a / b = cmdn_ "frac" [a,b]++instance Floating TeX where+    pi = cmd "pi" nil+    exp x = "e^" <> braces x+    sqrt = cmd "sqrt"++instance Num TeX where+  fromInteger x = text $ show x+  (+) = binop $ text "+"+  (-) = binop $ text "-"+  (*) = binop $ text "*"+  negate x = "-" <> x++binop :: TeX -> TeX -> TeX -> TeX+binop op a b = a <> op <> b+
+ MarXup/MetaPost.hs view
@@ -0,0 +1,27 @@++module MarXup.MetaPost where++import MarXup.Tex++  +metaPostPreamble :: Tex a -> Tex ()+metaPostPreamble texPreamble =  do+  texLines ["outputtemplate := \"%j-%c.mps\";",+            "input drv;",+            "verbatimtex %&latex",+            ""]+  texPreamble+  texLines ["",+            "\\begin{document}",+            "etex;",+            "prologues:=3;"]  +  +metaPostEpilogue = texLn "end"+    ++metapostFigure :: Label -> Tex a -> Tex ()+metapostFigure lab t = Metapost $ do+  Tex "beginfig(" >> Refer lab >> Tex ")\n"+  t+  texLn "endfig;"+
+ MarXup/Tex.hs view
@@ -0,0 +1,153 @@+module MarXup.Tex where++import Control.Monad.Fix+import Control.Monad.RWS.Lazy+import Control.Applicative+import Data.Either+import GHC.Exts( IsString(..) )+import System.FilePath+import System.Environment+import Data.List (intersperse)++---------------------------------+-- Marchup interface+textual = Tex  -- TODO: escape \, &, etc.+text = textual +++element :: Tex a -> Tex a+element = id++-----------------------------------+-- Basic datatype and semantics+type Label = Int++data Tex a where+  Return :: a -> Tex a+  Bind :: Tex a -> (a -> Tex b) -> Tex b++  Tex :: String -> Tex () -- ^ raw TeX code++  -- Reference management+  Label :: Tex Label+  Refer :: Label -> Tex Label+  MFix :: (a -> Tex a) -> Tex a ++  -- MetaPOST+  Metapost :: Tex a -> Tex a -- the output should go in the metapost file+  MPFigure :: Label -> Tex () -- inclusion of a metapost figure+  +tex = Tex+type TeX = Tex ()++newLabel = Label  +reference = Refer++instance MonadFix Tex where+  mfix = MFix++instance Monad Tex where+  (>>=) = Bind+  return = Return+  +instance Applicative Tex where+  (<*>) = ap+  pure = Return+  +instance Functor Tex where+  fmap = liftM+  +instance Monoid (Tex ()) where  +  mempty = Tex ""+  mappend = (>>)+  +(<>) :: Monoid a =>  a -> a -> a+(<>) = mappend+  +instance IsString (Tex ()) where  +  fromString = Tex+  +type References = Int -- how many labels have been allocated+emptyRefs :: References+emptyRefs = 0+                  +select :: Bool -> a -> Either a a+select True x = Left x+select False x = Right x+            +-- | Produces a list of strings (either for LaTeX or MetaPOST).+display :: String -> Bool -> Tex a -> RWS () [Either String String] References a+display fname mp t = case t of+      (Tex s) -> tell' s+      (Return a) -> return a+      (Bind k f) -> rec k >>= (rec . f)+      Label -> do x <- get;  put $ x + 1; return x+      (Refer x) -> do tell [select mp $ show x]; return x+      (MFix f) -> mfix (rec . f)+      (Metapost x) -> display fname True x +      (MPFigure l) -> tell' $ fname ++ "-" ++ show l ++ ".mps"+  where tell' s = tell [select mp s]                                           +        rec = display fname mp+        +sho :: Show a => a -> Tex ()+sho = Tex . show+                             +render :: Tex a -> IO ()                   +render t = do +  fname <- getProgName+  let (_,xs) = evalRWS (display fname False t) () emptyRefs +      (mp,tex) = partitionEithers xs+  writeFile (fname <.> "tex") (concat tex)+  writeFile (fname <.> "mp") (concat mp)+                    ++texLn :: String -> Tex ()    +texLn s = Tex s >> Tex "\n"++texLines :: [String] -> Tex ()+texLines = mapM_ texLn++genParen :: String -> Tex a -> Tex a+genParen [l,r] x = Tex [l] *> x <* Tex [r]++braces :: Tex a -> Tex a+braces = genParen "{}"+brackets = genParen "[]"++backslash = Tex ['\\']++nil = braces (Tex "")++cmd c = cmd' c []++cmd' cmd options arg = do+  [x] <- cmdn' cmd options [arg]+  return x++cmdn' :: String -> [String] -> [Tex a] -> Tex [a]+cmdn' cmd options args = do +  backslash >> Tex cmd+  when (not $ null options) $ brackets $ sequence_ $ map tex $ intersperse "," options+  res <- sequence $ map braces args+  when (null args) $ Tex "{}" -- so that this does not get glued with the next thing.+  return res++cmdn'_ :: String -> [String] -> [Tex a] -> Tex ()+cmdn'_ cmd options args = cmdn' cmd options args >> return ()++cmdn cmd args = cmdn' cmd [] args+cmdn_ cmd args = cmdn'_ cmd [] args++env :: String -> Tex a -> Tex a+env e body = do+  cmd "begin" $ Tex e+  x <- body+  cmd "end" $ Tex e+  return x++label = do+  l <- Label+  cmd "label" (Refer l)+  +xref l = do+  cmd "ref" (Refer l)
+ MarXup/Text.hs view
@@ -0,0 +1,43 @@+module MarXup.Text (Text(..), textual, element, module Data.Monoid, linearize) where++import Data.Monoid+import Data.Traversable+import Data.Foldable+import Control.Applicative+import Control.Monad+import Control.Monad.Fix+import Control.Monad.Writer++data Text a where+  Return :: a -> Text a +  Text :: String -> Text () +  (:>>=) :: Text a -> (a -> Text b) -> Text b +  MFix :: (a -> Text a) -> Text a++textual = Text++element :: Show a => a -> Text ()+element = Text . show++instance MonadFix Text where+  mfix = MFix++instance Monad Text where+  (>>=) = (:>>=)+  return = Return+  +instance Applicative Text where+  (<*>) = ap+  pure = Return+  +instance Functor Text where+  fmap = liftM++run :: Text a -> Writer [String] a+run (Return x) = return x+run (Text x) = tell [x]+run (k :>>= f) = run k >>= run . f+run (MFix f) = mfix (run . f)++linearize :: Text a -> [String]+linearize t = snd $ runWriter $ run t
+ Setup.hs view
@@ -0,0 +1,2 @@+import Distribution.Simple+main = defaultMain
+ examples/LaTeX.hs view
@@ -0,0 +1,72 @@+{-# OPTIONS_GHC -XTypeSynonymInstances -XOverloadedStrings -XDoRec -pgmF marchup -F #-}++import MarXup.Latex+import MarXup.Tex+import MarXup.DerivationTrees+import Control.Applicative++preamble :: Tex ()+preamble = do+  usepackage ["mathletters"] "ucs"+  usepackage ["utf8x"] "inputenc"+++someTree = derivationTree $ Node (rule (mbox "who knows?") "A → B") []++(∶) = binop ":"+γ = cmd "Gamma" nil+(⊢) = binop $ cmd "vdash" nil++x = Tex "x"+y = Tex "y"+a = Tex "a"+b = Tex "b"++(≜) = binop "="++main = render $ latexDocument "article" ["11pt"] preamble $ @"+@section{Markup}++At-syntax is used to call a Haskell function. ++Here comes @sf{some sans-serif text with @em{emphasis}!}++Note that arguments put in braces are markup.+Arguments in parenthesis contain regular Haskell code.+So, we could also write it+@em(text "like this").+++@someSection<-section{References}++The result of a call can be bound.+For example, the @sf{section} command returns a label that can be used+for references.++This is section @xref(someSection). Note that cross-references are checked+at ``compile-time''. Forward references also work (see+sec. @xref(concl)).++++@section{Math}++Haskell syntax is somewhat more convenient than markup to +write math. Combined with unicode,+this can make writing all sorts of mathy stuff rather pleasant. For+example: @math(γ ⊢ x ∶ a).++The operators are overloaded to work on text as well:+@displayMath(b ≜ sqrt (a + x/y))+However you must insert parentheses yourself+(until the math sub-DSL is implemented):+@displayMath((x+x)*x)+++@concl<-section{Conclusion}+++Marχup is awesome. :)++@"+
+ marxup.cabal view
@@ -0,0 +1,40 @@+name:           marxup+version:        1.0.0+category:       Text+synopsis:       Markup language preprocessor for Haskell+description:+  Markup syntax preprocessor for Haskell. Steals ideas from the Scribble project (in Scheme).+  The package also provides a DSL to output Latex seamlessly from MarXup output.+license:        GPL+license-file:   LICENSE+author:         Jean-Philippe Bernardy+maintainer:     jeanphilippe.bernardy@gmail.com+Cabal-Version:  >= 1.8+tested-with:    GHC==6.12.1+build-type:     Simple+data-files:+  examples/LaTeX.hs++executable marxup+  extensions: FlexibleInstances, TupleSections+  main-is: Main.hs+  build-depends: base==4.*+  build-depends: pretty==1.0.*+  build-depends: parsec==2.1.*+  +library+  extensions: FlexibleInstances, TypeSynonymInstances, GADTs+  build-depends: base==4.*+--  build-depends: pandoc==1.5.*  (broken)+  build-depends: mtl==2.0.*+  build-depends: labeled-tree==1.*  +  build-depends: filepath==1.1.*  ++  exposed-modules: MarXup.Tex+  exposed-modules: MarXup.MetaPost+  exposed-modules: MarXup.Latex+  exposed-modules: MarXup.Beamer+  exposed-modules: MarXup.DerivationTrees  +  exposed-modules: MarXup.Text+--  exposed-modules: MarXup.Pandoc (broken)+