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-rw-r--r--pandoc.hs9
-rw-r--r--src/Text/Pandoc/Options.hs2
-rw-r--r--src/Text/Pandoc/Readers/Markdown.hs12
3 files changed, 22 insertions, 1 deletions
diff --git a/pandoc.hs b/pandoc.hs
index e49b3b9cf..677101746 100644
--- a/pandoc.hs
+++ b/pandoc.hs
@@ -162,6 +162,7 @@ data Opt = Opt
, optAscii :: Bool -- ^ Use ascii characters only in html
, optTeXLigatures :: Bool -- ^ Use TeX ligatures for quotes/dashes
, optDefaultImageExtension :: String -- ^ Default image extension
+ , optTrace :: Bool -- ^ Print debug information
}
-- | Defaults for command-line options.
@@ -217,6 +218,7 @@ defaultOpts = Opt
, optAscii = False
, optTeXLigatures = True
, optDefaultImageExtension = ""
+ , optTrace = False
}
-- | A list of functions, each transforming the options data structure
@@ -758,6 +760,11 @@ options =
(\opt -> return opt { optHTMLMathMethod = GladTeX }))
"" -- "Use gladtex for HTML math"
+ , Option "" ["trace"]
+ (NoArg
+ (\opt -> return opt { optTrace = True }))
+ "" -- "Turn on diagnostic tracing in readers."
+
, Option "" ["dump-args"]
(NoArg
(\opt -> return opt { optDumpArgs = True }))
@@ -952,6 +959,7 @@ main = do
, optAscii = ascii
, optTeXLigatures = texLigatures
, optDefaultImageExtension = defaultImageExtension
+ , optTrace = trace
} = opts
when dumpArgs $
@@ -1074,6 +1082,7 @@ main = do
, readerIndentedCodeClasses = codeBlockClasses
, readerApplyMacros = not laTeXOutput
, readerDefaultImageExtension = defaultImageExtension
+ , readerTrace = trace
}
let writerOptions = def { writerStandalone = standalone',
diff --git a/src/Text/Pandoc/Options.hs b/src/Text/Pandoc/Options.hs
index 5f65abdde..38220f542 100644
--- a/src/Text/Pandoc/Options.hs
+++ b/src/Text/Pandoc/Options.hs
@@ -210,6 +210,7 @@ data ReaderOptions = ReaderOptions{
, readerIndentedCodeClasses :: [String] -- ^ Default classes for
-- indented code blocks
, readerDefaultImageExtension :: String -- ^ Default extension for images
+ , readerTrace :: Bool -- ^ Print debugging info
} deriving (Show, Read)
instance Default ReaderOptions
@@ -225,6 +226,7 @@ instance Default ReaderOptions
, readerApplyMacros = True
, readerIndentedCodeClasses = []
, readerDefaultImageExtension = ""
+ , readerTrace = False
}
--
diff --git a/src/Text/Pandoc/Readers/Markdown.hs b/src/Text/Pandoc/Readers/Markdown.hs
index dd6fa733a..c73c8f610 100644
--- a/src/Text/Pandoc/Readers/Markdown.hs
+++ b/src/Text/Pandoc/Readers/Markdown.hs
@@ -60,6 +60,8 @@ import System.FilePath (takeExtension, addExtension)
import Text.HTML.TagSoup
import Text.HTML.TagSoup.Match (tagOpen)
import qualified Data.Set as Set
+import Text.Printf (printf)
+import Debug.Trace (trace)
type MarkdownParser = Parser [Char] ParserState
@@ -440,7 +442,10 @@ parseBlocks :: MarkdownParser (F Blocks)
parseBlocks = mconcat <$> manyTill block eof
block :: MarkdownParser (F Blocks)
-block = choice [ mempty <$ blanklines
+block = do
+ tr <- getOption readerTrace
+ pos <- getPosition
+ res <- choice [ mempty <$ blanklines
, codeBlockFenced
, yamlMetaBlock
, guardEnabled Ext_latex_macros *> (macro >>= return . return)
@@ -465,6 +470,11 @@ block = choice [ mempty <$ blanklines
, para
, plain
] <?> "block"
+ when tr $ do
+ st <- getState
+ trace (printf "line %d: %s" (sourceLine pos)
+ (take 60 $ show $ B.toList $ runF res st)) (return ())
+ return res
--
-- header blocks