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authorNikolay Yakimov <root@livid.pp.ru>2015-04-18 01:18:06 +0300
committerNikolay Yakimov <root@livid.pp.ru>2015-04-18 01:23:41 +0300
commit4229cf2d92faf5774fe1a3a9c89a5de885cf75cd (patch)
tree89053b0783e1396068dae6b085d1b15c693529a0 /src/Text/Pandoc
parent94e4a5ec44ea3ac53a5cd69479ba716862f86c07 (diff)
downloadpandoc-4229cf2d92faf5774fe1a3a9c89a5de885cf75cd.tar.gz
MD Reader: Smart `'` after inline math
Closes #1909. Adds new parser combinator to Parsing.hs `a <+?> b` : if a succeeds, applies b and mappends output (if any) to result of a. If b fails, it's just a, if a fails, whole expression fails.
Diffstat (limited to 'src/Text/Pandoc')
-rw-r--r--src/Text/Pandoc/Parsing.hs7
-rw-r--r--src/Text/Pandoc/Readers/Markdown.hs3
2 files changed, 8 insertions, 2 deletions
diff --git a/src/Text/Pandoc/Parsing.hs b/src/Text/Pandoc/Parsing.hs
index c18aa331f..d30c74230 100644
--- a/src/Text/Pandoc/Parsing.hs
+++ b/src/Text/Pandoc/Parsing.hs
@@ -161,7 +161,8 @@ module Text.Pandoc.Parsing ( anyLine,
setSourceColumn,
setSourceLine,
newPos,
- addWarning
+ addWarning,
+ (<+?>)
)
where
@@ -1245,3 +1246,7 @@ addWarning mbpos msg =
generalize :: (Monad m) => Parser s st a -> ParserT s st m a
generalize m = mkPT (\ s -> (return $ (return . runIdentity) <$> runIdentity (runParsecT m s)))
+
+infixr 5 <+?>
+(<+?>) :: (Monoid a, Monad m) => ParserT s st m a -> ParserT s st m a -> ParserT s st m a
+a <+?> b = a >>= flip fmap (try b <|> return mempty) . (<>)
diff --git a/src/Text/Pandoc/Readers/Markdown.hs b/src/Text/Pandoc/Readers/Markdown.hs
index ccda83576..5e0cef4f8 100644
--- a/src/Text/Pandoc/Readers/Markdown.hs
+++ b/src/Text/Pandoc/Readers/Markdown.hs
@@ -1487,7 +1487,8 @@ code = try $ do
math :: MarkdownParser Inlines
math = (B.displayMath <$> (mathDisplay >>= applyMacros'))
- <|> (B.math <$> (mathInline >>= applyMacros'))
+ <|> ((B.math <$> (mathInline >>= applyMacros')) <+?>
+ ((getOption readerSmart >>= guard) *> apostrophe <* notFollowedBy space))
-- Parses material enclosed in *s, **s, _s, or __s.
-- Designed to avoid backtracking.