From 9daf22fa615ad49b675e4e3aae722c982eb4cce3 Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Fri, 22 Dec 2017 16:45:13 -0800
Subject: LaTeX reader: Refactored inlineCommand.

---
 src/Text/Pandoc/Readers/LaTeX.hs | 35 +++++++++++------------------------
 1 file changed, 11 insertions(+), 24 deletions(-)

(limited to 'src')

diff --git a/src/Text/Pandoc/Readers/LaTeX.hs b/src/Text/Pandoc/Readers/LaTeX.hs
index e6ae4c11b..a43f3d572 100644
--- a/src/Text/Pandoc/Readers/LaTeX.hs
+++ b/src/Text/Pandoc/Readers/LaTeX.hs
@@ -237,19 +237,21 @@ withVerbatimMode parser = do
   return result
 
 rawLaTeXParser :: (PandocMonad m, HasMacros s, HasReaderOptions s)
-               => LP m a -> ParserT String s m String
+               => LP m a -> ParserT String s m (a, String)
 rawLaTeXParser parser = do
   inp <- getInput
   let toks = tokenize "source" $ T.pack inp
   pstate <- getState
-  let lstate = def{ sOptions = extractReaderOptions pstate }
-  res <- lift $ runParserT ((,) <$> try (snd <$> withRaw parser) <*> getState)
-            lstate "source" toks
+  let lstate = def{ sOptions = extractReaderOptions pstate
+                  , sMacros = extractMacros pstate }
+  let rawparser = (,) <$> withRaw parser <*> getState
+  res <- lift $ runParserT rawparser lstate "chunk" toks
   case res of
        Left _    -> mzero
-       Right (raw, st) -> do
+       Right ((val, raw), st) -> do
          updateState (updateMacros (sMacros st <>))
-         takeP (T.length (untokenize raw))
+         rawstring <- takeP (T.length (untokenize raw))
+         return (val, rawstring)
 
 applyMacros :: (PandocMonad m, HasMacros s, HasReaderOptions s)
             => String -> ParserT String s m String
@@ -268,33 +270,18 @@ rawLaTeXBlock :: (PandocMonad m, HasMacros s, HasReaderOptions s)
               => ParserT String s m String
 rawLaTeXBlock = do
   lookAhead (try (char '\\' >> letter))
-  rawLaTeXParser (environment <|> macroDef <|> blockCommand)
+  snd <$> rawLaTeXParser (environment <|> macroDef <|> blockCommand)
 
 rawLaTeXInline :: (PandocMonad m, HasMacros s, HasReaderOptions s)
                => ParserT String s m String
 rawLaTeXInline = do
   lookAhead (try (char '\\' >> letter) <|> char '$')
-  rawLaTeXParser (inlineEnvironment <|> inlineCommand')
+  snd <$> rawLaTeXParser (inlineEnvironment <|> inlineCommand')
 
 inlineCommand :: PandocMonad m => ParserT String ParserState m Inlines
 inlineCommand = do
   lookAhead (try (char '\\' >> letter) <|> char '$')
-  inp <- getInput
-  let toks = tokenize "chunk" $ T.pack inp
-  let rawinline = do
-         (il, raw) <- try $ withRaw (inlineEnvironment <|> inlineCommand')
-         st <- getState
-         return (il, raw, st)
-  pstate <- getState
-  let lstate = def{ sOptions = extractReaderOptions pstate
-                  , sMacros  = extractMacros pstate }
-  res <- runParserT rawinline lstate "source" toks
-  case res of
-       Left _ -> mzero
-       Right (il, raw, s) -> do
-         updateState $ updateMacros (const $ sMacros s)
-         takeP (T.length (untokenize raw))
-         return il
+  fst <$> rawLaTeXParser (inlineEnvironment <|> inlineCommand')
 
 tokenize :: SourceName -> Text -> [Tok]
 tokenize sourcename = totoks (initialPos sourcename)
-- 
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