From 7c6a3c0f69130c7df31c3b27623220a98fc88e9c Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Sun, 28 Feb 2016 11:14:03 -0800
Subject: LaTeX reader:  handle interior `$` characters in math.

e.g. `$$\hbox{$i$}$$`.

Partially addresses #2743.
---
 src/Text/Pandoc/Readers/LaTeX.hs | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

(limited to 'src/Text/Pandoc/Readers')

diff --git a/src/Text/Pandoc/Readers/LaTeX.hs b/src/Text/Pandoc/Readers/LaTeX.hs
index 9a1708331..2be55c9da 100644
--- a/src/Text/Pandoc/Readers/LaTeX.hs
+++ b/src/Text/Pandoc/Readers/LaTeX.hs
@@ -166,10 +166,18 @@ mathInline :: LP String -> LP Inlines
 mathInline p = math <$> (try p >>= applyMacros')
 
 mathChars :: LP String
-mathChars = (concat <$>) $
-  many $
-          many1 (satisfy (\c -> c /= '$' && c /='\\'))
-      <|> (\c -> ['\\',c]) <$> try (char '\\' *> anyChar)
+mathChars =
+  concat <$> many (escapedChar
+               <|> (snd <$> withRaw braced)
+               <|> many1 (satisfy isOrdChar))
+   where escapedChar = try $ do char '\\'
+                                c <- anyChar
+                                return ['\\',c]
+         isOrdChar '$' = False
+         isOrdChar '{' = False
+         isOrdChar '}' = False
+         isOrdChar '\\' = False
+         isOrdChar _ = True
 
 quoted' :: (Inlines -> Inlines) -> LP String -> LP () -> LP Inlines
 quoted' f starter ender = do
-- 
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