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lib: reduce backtracking in commoditydirectiveonelinep

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This commit is contained in:
Alex Chen 2018-06-11 14:29:18 -06:00
parent 0382bb5cd4
commit 0fb737bc39
1 changed files with 7 additions and 5 deletions
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12
hledger-lib/Hledger/Read/JournalReader.hs
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@ -265,7 +265,7 @@ indentedlinep = lift (skipSome spacenonewline) >> (rstrip <$> lift restofline)
-- >>> Right _ <- rjp commoditydirectivep "commodity $\n\n" -- a commodity with no format -- >>> Right _ <- rjp commoditydirectivep "commodity $\n\n" -- a commodity with no format
-- >>> Right _ <- rjp commoditydirectivep "commodity $1.00\n format $1.00" -- both, what happens ? -- >>> Right _ <- rjp commoditydirectivep "commodity $1.00\n format $1.00" -- both, what happens ?
commoditydirectivep :: JournalParser m () commoditydirectivep :: JournalParser m ()
commoditydirectivep = try commoditydirectiveonelinep <|> commoditydirectivemultilinep commoditydirectivep = commoditydirectiveonelinep <|> commoditydirectivemultilinep
-- | Parse a one-line commodity directive. -- | Parse a one-line commodity directive.
-- --
@ -273,10 +273,12 @@ commoditydirectivep = try commoditydirectiveonelinep <|> commoditydirectivemulti
-- >>> Right _ <- rjp commoditydirectiveonelinep "commodity $1.00 ; blah\n" -- >>> Right _ <- rjp commoditydirectiveonelinep "commodity $1.00 ; blah\n"
commoditydirectiveonelinep :: JournalParser m () commoditydirectiveonelinep :: JournalParser m ()
commoditydirectiveonelinep = do commoditydirectiveonelinep = do
string "commodity" (pos, Amount{acommodity,astyle}) <- try $ do
lift (skipSome spacenonewline) string "commodity"
pos <- getPosition lift (skipSome spacenonewline)
Amount{acommodity,astyle} <- amountp pos <- getPosition
amount <- amountp
pure $ (pos, amount)
lift (skipMany spacenonewline) lift (skipMany spacenonewline)
_ <- lift followingcommentp _ <- lift followingcommentp
let comm = Commodity{csymbol=acommodity, cformat=Just $ dbg2 "style from commodity directive" astyle} let comm = Commodity{csymbol=acommodity, cformat=Just $ dbg2 "style from commodity directive" astyle}