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| -rw-r--r-- | src/Text/Pandoc/Readers/Markdown.hs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/Text/Pandoc/Readers/Markdown.hs b/src/Text/Pandoc/Readers/Markdown.hs index b655ea1a9..9fe5c9f06 100644 --- a/src/Text/Pandoc/Readers/Markdown.hs +++ b/src/Text/Pandoc/Readers/Markdown.hs @@ -320,6 +320,9 @@ atxClosing = try $ skipMany (char '#') >> blanklines setextHeader :: GenParser Char ParserState Block setextHeader = try $ do + -- This lookahead prevents us from wasting time parsing Inlines + -- unless necessary -- it gives a significant performance boost. + lookAhead $ anyLine >> many1 (oneOf setextHChars) >> blankline text <- many1Till inline newline underlineChar <- oneOf setextHChars many (char underlineChar) |