1090 lines
41 KiB
Haskell
1090 lines
41 KiB
Haskell
--- * doc
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-- Lines beginning "--- *" are collapsible orgstruct nodes. Emacs users,
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-- (add-hook 'haskell-mode-hook
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-- (lambda () (set-variable 'orgstruct-heading-prefix-regexp "--- " t))
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-- 'orgstruct-mode)
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-- and press TAB on nodes to expand/collapse.
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{-|
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Some common parsers and helpers used by several readers.
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Some of these might belong in Hledger.Read.JournalReader or Hledger.Read.
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-}
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--- * module
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{-# LANGUAGE CPP, BangPatterns, DeriveDataTypeable, RecordWildCards, NamedFieldPuns, NoMonoLocalBinds, ScopedTypeVariables, FlexibleContexts, TupleSections, OverloadedStrings #-}
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{-# LANGUAGE LambdaCase #-}
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module Hledger.Read.Common (
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Reader (..),
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InputOpts (..),
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rawOptsToInputOpts,
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-- * parsing utilities
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runTextParser,
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rtp,
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runJournalParser,
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rjp,
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runErroringJournalParser,
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rejp,
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genericSourcePos,
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journalSourcePos,
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generateAutomaticPostings,
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parseAndFinaliseJournal,
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parseAndFinaliseJournal', -- TODO unused ? check addons
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setYear,
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setDefaultCommodityAndStyle,
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getDefaultCommodityAndStyle,
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pushAccount,
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pushParentAccount,
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popParentAccount,
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getParentAccount,
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addAccountAlias,
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clearAccountAliases,
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journalAddFile,
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parserErrorAt,
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-- * parsers
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-- ** transaction bits
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statusp,
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codep,
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descriptionp,
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-- ** dates
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datep,
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datetimep,
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secondarydatep,
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-- ** account names
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modifiedaccountnamep,
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accountnamep,
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-- ** amounts
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spaceandamountormissingp,
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amountp,
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mamountp',
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commoditysymbolp,
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partialbalanceassertionp,
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fixedlotpricep,
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numberp,
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-- ** comments
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multilinecommentp,
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emptyorcommentlinep,
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followingcommentp,
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followingcommentandtagsp,
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-- ** tags
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commentTags,
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tagsp
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)
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where
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--- * imports
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import Prelude ()
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import Prelude.Compat hiding (readFile)
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import Control.Arrow ((***))
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import Control.Monad.Compat
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import Control.Monad.Except (ExceptT(..), runExceptT, throwError) --, catchError)
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import Control.Monad.State.Strict
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import Data.Char
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import Data.Data
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import Data.Default
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import Data.Functor.Identity
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import Data.List.Compat
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import Data.List.NonEmpty (NonEmpty(..))
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import Data.List.Split (wordsBy)
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import Data.Maybe
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import qualified Data.Map as M
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#if !(MIN_VERSION_base(4,11,0))
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import Data.Monoid
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#endif
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import Data.Text (Text)
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import qualified Data.Text as T
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import Data.Time.Calendar
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import Data.Time.LocalTime
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import Safe
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import System.Time (getClockTime)
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import Text.Megaparsec.Compat
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import Hledger.Data
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import Hledger.Utils
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import qualified Hledger.Query as Q (Query(Any))
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-- | A hledger journal reader is a triple of storage format name, a
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-- detector of that format, and a parser from that format to Journal.
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data Reader = Reader {
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-- The canonical name of the format handled by this reader
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rFormat :: StorageFormat
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-- The file extensions recognised as containing this format
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,rExtensions :: [String]
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-- A text parser for this format, accepting input options, file
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-- path for error messages and file contents, producing an exception-raising IO
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-- action that returns a journal or error message.
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,rParser :: InputOpts -> FilePath -> Text -> ExceptT String IO Journal
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-- Experimental readers are never tried automatically.
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,rExperimental :: Bool
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}
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instance Show Reader where show r = rFormat r ++ " reader"
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-- $setup
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-- | Various options to use when reading journal files.
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-- Similar to CliOptions.inputflags, simplifies the journal-reading functions.
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data InputOpts = InputOpts {
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-- files_ :: [FilePath]
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mformat_ :: Maybe StorageFormat -- ^ a file/storage format to try, unless overridden
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-- by a filename prefix. Nothing means try all.
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,mrules_file_ :: Maybe FilePath -- ^ a conversion rules file to use (when reading CSV)
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,aliases_ :: [String] -- ^ account name aliases to apply
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,anon_ :: Bool -- ^ do light anonymisation/obfuscation of the data
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,ignore_assertions_ :: Bool -- ^ don't check balance assertions
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,new_ :: Bool -- ^ read only new transactions since this file was last read
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,new_save_ :: Bool -- ^ save latest new transactions state for next time
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,pivot_ :: String -- ^ use the given field's value as the account name
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,auto_ :: Bool -- ^ generate automatic postings when journal is parsed
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} deriving (Show, Data) --, Typeable)
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instance Default InputOpts where def = definputopts
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definputopts :: InputOpts
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definputopts = InputOpts def def def def def def True def def
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rawOptsToInputOpts :: RawOpts -> InputOpts
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rawOptsToInputOpts rawopts = InputOpts{
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-- files_ = map (T.unpack . stripquotes . T.pack) $ listofstringopt "file" rawopts
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mformat_ = Nothing
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,mrules_file_ = maybestringopt "rules-file" rawopts
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,aliases_ = map (T.unpack . stripquotes . T.pack) $ listofstringopt "alias" rawopts
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,anon_ = boolopt "anon" rawopts
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,ignore_assertions_ = boolopt "ignore-assertions" rawopts
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,new_ = boolopt "new" rawopts
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,new_save_ = True
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,pivot_ = stringopt "pivot" rawopts
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,auto_ = boolopt "auto" rawopts
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}
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--- * parsing utilities
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-- | Run a string parser with no state in the identity monad.
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runTextParser, rtp :: TextParser Identity a -> Text -> Either (ParseError Char MPErr) a
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runTextParser p t = runParser p "" t
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rtp = runTextParser
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-- XXX odd, why doesn't this take a JournalParser ?
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-- | Run a journal parser with a null journal-parsing state.
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runJournalParser, rjp :: Monad m => TextParser m a -> Text -> m (Either (ParseError Char MPErr) a)
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runJournalParser p t = runParserT p "" t
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rjp = runJournalParser
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-- | Run an error-raising journal parser with a null journal-parsing state.
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runErroringJournalParser, rejp :: Monad m => ErroringJournalParser m a -> Text -> m (Either String a)
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runErroringJournalParser p t =
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runExceptT $
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runJournalParser (evalStateT p mempty)
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t >>=
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either (throwError . parseErrorPretty) return
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rejp = runErroringJournalParser
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genericSourcePos :: SourcePos -> GenericSourcePos
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genericSourcePos p = GenericSourcePos (sourceName p) (fromIntegral . unPos $ sourceLine p) (fromIntegral . unPos $ sourceColumn p)
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journalSourcePos :: SourcePos -> SourcePos -> GenericSourcePos
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journalSourcePos p p' = JournalSourcePos (sourceName p) (fromIntegral . unPos $ sourceLine p, fromIntegral $ line')
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where line'
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| (unPos $ sourceColumn p') == 1 = unPos (sourceLine p') - 1
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| otherwise = unPos $ sourceLine p' -- might be at end of file withat last new-line
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-- | Generate Automatic postings and add them to the current journal.
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generateAutomaticPostings :: Journal -> Journal
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generateAutomaticPostings j = j { jtxns = map modifier $ jtxns j }
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where
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modifier = foldr (flip (.) . runModifierTransaction') id mtxns
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runModifierTransaction' = fmap txnTieKnot . runModifierTransaction Q.Any
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mtxns = jmodifiertxns j
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-- | Given a megaparsec ParsedJournal parser, input options, file
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-- path and file content: parse and post-process a Journal, or give an error.
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parseAndFinaliseJournal :: ErroringJournalParser IO ParsedJournal -> InputOpts
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-> FilePath -> Text -> ExceptT String IO Journal
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parseAndFinaliseJournal parser iopts f txt = do
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t <- liftIO getClockTime
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y <- liftIO getCurrentYear
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ep <- runParserT (evalStateT parser nulljournal {jparsedefaultyear=Just y}) f txt
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case ep of
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Right pj ->
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let pj' = if auto_ iopts then generateAutomaticPostings pj else pj in
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case journalFinalise t f txt (not $ ignore_assertions_ iopts) pj' of
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Right j -> return j
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Left e -> throwError e
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Left e -> throwError $ parseErrorPretty e
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parseAndFinaliseJournal' :: JournalParser Identity ParsedJournal -> InputOpts
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-> FilePath -> Text -> ExceptT String IO Journal
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parseAndFinaliseJournal' parser iopts f txt = do
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t <- liftIO getClockTime
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y <- liftIO getCurrentYear
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let ep = runParser (evalStateT parser nulljournal {jparsedefaultyear=Just y}) f txt
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case ep of
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Right pj ->
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let pj' = if auto_ iopts then generateAutomaticPostings pj else pj in
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case journalFinalise t f txt (not $ ignore_assertions_ iopts) pj' of
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Right j -> return j
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Left e -> throwError e
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Left e -> throwError $ parseErrorPretty e
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setYear :: Year -> JournalParser m ()
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setYear y = modify' (\j -> j{jparsedefaultyear=Just y})
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getYear :: JournalParser m (Maybe Year)
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getYear = fmap jparsedefaultyear get
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setDefaultCommodityAndStyle :: (CommoditySymbol,AmountStyle) -> JournalParser m ()
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setDefaultCommodityAndStyle cs = modify' (\j -> j{jparsedefaultcommodity=Just cs})
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getDefaultCommodityAndStyle :: JournalParser m (Maybe (CommoditySymbol,AmountStyle))
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getDefaultCommodityAndStyle = jparsedefaultcommodity `fmap` get
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-- | Get amount style associated with default currency.
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--
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-- Returns 'AmountStyle' used to defined by a latest default commodity directive
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-- prior to current position within this file or its parents.
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getDefaultAmountStyle :: JournalParser m (Maybe AmountStyle)
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getDefaultAmountStyle = fmap snd <$> getDefaultCommodityAndStyle
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-- | Lookup currency-specific amount style.
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--
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-- Returns 'AmountStyle' used in commodity directive within current journal
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-- prior to current position or in its parents files.
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getAmountStyle :: CommoditySymbol -> JournalParser m (Maybe AmountStyle)
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getAmountStyle commodity = do
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specificStyle <- maybe Nothing cformat . M.lookup commodity . jcommodities <$> get
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defaultStyle <- fmap snd <$> getDefaultCommodityAndStyle
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let effectiveStyle = listToMaybe $ catMaybes [specificStyle, defaultStyle]
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return effectiveStyle
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pushAccount :: AccountName -> JournalParser m ()
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pushAccount acct = modify' (\j -> j{jaccounts = (acct, Nothing) : jaccounts j})
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pushParentAccount :: AccountName -> JournalParser m ()
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pushParentAccount acct = modify' (\j -> j{jparseparentaccounts = acct : jparseparentaccounts j})
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popParentAccount :: JournalParser m ()
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popParentAccount = do
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j <- get
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case jparseparentaccounts j of
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[] -> unexpected (Tokens ('E' :| "nd of apply account block with no beginning"))
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(_:rest) -> put j{jparseparentaccounts=rest}
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getParentAccount :: JournalParser m AccountName
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getParentAccount = fmap (concatAccountNames . reverse . jparseparentaccounts) get
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addAccountAlias :: MonadState Journal m => AccountAlias -> m ()
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addAccountAlias a = modify' (\(j@Journal{..}) -> j{jparsealiases=a:jparsealiases})
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getAccountAliases :: MonadState Journal m => m [AccountAlias]
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getAccountAliases = fmap jparsealiases get
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clearAccountAliases :: MonadState Journal m => m ()
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clearAccountAliases = modify' (\(j@Journal{..}) -> j{jparsealiases=[]})
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-- getTransactionCount :: MonadState Journal m => m Integer
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-- getTransactionCount = fmap jparsetransactioncount get
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--
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-- setTransactionCount :: MonadState Journal m => Integer -> m ()
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-- setTransactionCount i = modify' (\j -> j{jparsetransactioncount=i})
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--
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-- -- | Increment the transaction index by one and return the new value.
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-- incrementTransactionCount :: MonadState Journal m => m Integer
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-- incrementTransactionCount = do
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-- modify' (\j -> j{jparsetransactioncount=jparsetransactioncount j + 1})
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-- getTransactionCount
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journalAddFile :: (FilePath,Text) -> Journal -> Journal
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journalAddFile f j@Journal{jfiles=fs} = j{jfiles=fs++[f]}
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-- append, unlike the other fields, even though we do a final reverse,
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-- to compensate for additional reversal due to including/monoid-concatting
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-- -- | Terminate parsing entirely, returning the given error message
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-- -- with the current parse position prepended.
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-- parserError :: String -> ErroringJournalParser a
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-- parserError s = do
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-- pos <- getPosition
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-- parserErrorAt pos s
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-- | Terminate parsing entirely, returning the given error message
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-- with the given parse position prepended.
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parserErrorAt :: Monad m => SourcePos -> String -> ErroringJournalParser m a
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parserErrorAt pos s = throwError $ sourcePosPretty pos ++ ":\n" ++ s
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--- * parsers
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--- ** transaction bits
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statusp :: TextParser m Status
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statusp =
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choice'
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[ skipMany spacenonewline >> char '*' >> return Cleared
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, skipMany spacenonewline >> char '!' >> return Pending
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, return Unmarked
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]
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<?> "cleared status"
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codep :: TextParser m String
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codep = try (do { skipSome spacenonewline; char '(' <?> "codep"; anyChar `manyTill` char ')' } ) <|> return ""
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descriptionp :: JournalParser m String
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descriptionp = many (noneOf (";\n" :: [Char]))
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--- ** dates
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-- | Parse a date in YYYY/MM/DD format.
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-- Hyphen (-) and period (.) are also allowed as separators.
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-- The year may be omitted if a default year has been set.
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-- Leading zeroes may be omitted.
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datep :: JournalParser m Day
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datep = do
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-- hacky: try to ensure precise errors for invalid dates
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-- XXX reported error position is not too good
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-- pos <- genericSourcePos <$> getPosition
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datestr <- do
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c <- digitChar
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cs <- lift $ many $ choice' [digitChar, datesepchar]
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return $ c:cs
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let sepchars = nub $ sort $ filter (`elem` datesepchars) datestr
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when (length sepchars /= 1) $ fail $ "bad date, different separators used: " ++ datestr
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let dateparts = wordsBy (`elem` datesepchars) datestr
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currentyear <- getYear
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[y,m,d] <- case (dateparts,currentyear) of
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([m,d],Just y) -> return [show y,m,d]
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([_,_],Nothing) -> fail $ "partial date "++datestr++" found, but the current year is unknown"
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([y,m,d],_) -> return [y,m,d]
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_ -> fail $ "bad date: " ++ datestr
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let maybedate = fromGregorianValid (read y) (read m) (read d)
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case maybedate of
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Nothing -> fail $ "bad date: " ++ datestr
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Just date -> return date
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<?> "full or partial date"
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-- | Parse a date and time in YYYY/MM/DD HH:MM[:SS][+-ZZZZ] format.
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-- Hyphen (-) and period (.) are also allowed as date separators.
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-- The year may be omitted if a default year has been set.
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-- Seconds are optional.
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-- The timezone is optional and ignored (the time is always interpreted as a local time).
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-- Leading zeroes may be omitted (except in a timezone).
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datetimep :: JournalParser m LocalTime
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datetimep = do
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day <- datep
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lift $ skipSome spacenonewline
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h <- some digitChar
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let h' = read h
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guard $ h' >= 0 && h' <= 23
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char ':'
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m <- some digitChar
|
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let m' = read m
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guard $ m' >= 0 && m' <= 59
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s <- optional $ char ':' >> some digitChar
|
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let s' = case s of Just sstr -> read sstr
|
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Nothing -> 0
|
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guard $ s' >= 0 && s' <= 59
|
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{- tz <- -}
|
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optional $ do
|
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plusminus <- oneOf ("-+" :: [Char])
|
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d1 <- digitChar
|
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d2 <- digitChar
|
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d3 <- digitChar
|
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d4 <- digitChar
|
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return $ plusminus:d1:d2:d3:d4:""
|
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-- ltz <- liftIO $ getCurrentTimeZone
|
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-- let tz' = maybe ltz (fromMaybe ltz . parseTime defaultTimeLocale "%z") tz
|
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-- return $ localTimeToUTC tz' $ LocalTime day $ TimeOfDay h' m' (fromIntegral s')
|
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return $ LocalTime day $ TimeOfDay h' m' (fromIntegral s')
|
||
|
||
secondarydatep :: Day -> JournalParser m Day
|
||
secondarydatep primarydate = do
|
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char '='
|
||
-- kludgy way to use primary date for default year
|
||
let withDefaultYear d p = do
|
||
y <- getYear
|
||
let (y',_,_) = toGregorian d in setYear y'
|
||
r <- p
|
||
when (isJust y) $ setYear $ fromJust y -- XXX
|
||
-- mapM setYear <$> y
|
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return r
|
||
withDefaultYear primarydate datep
|
||
|
||
-- |
|
||
-- >> parsewith twoorthreepartdatestringp "2016/01/2"
|
||
-- Right "2016/01/2"
|
||
-- twoorthreepartdatestringp = do
|
||
-- n1 <- some digitChar
|
||
-- c <- datesepchar
|
||
-- n2 <- some digitChar
|
||
-- mn3 <- optional $ char c >> some digitChar
|
||
-- return $ n1 ++ c:n2 ++ maybe "" (c:) mn3
|
||
|
||
--- ** account names
|
||
|
||
-- | Parse an account name, then apply any parent account prefix and/or account aliases currently in effect.
|
||
modifiedaccountnamep :: JournalParser m AccountName
|
||
modifiedaccountnamep = do
|
||
parent <- getParentAccount
|
||
aliases <- getAccountAliases
|
||
a <- lift accountnamep
|
||
return $
|
||
accountNameApplyAliases aliases $
|
||
-- XXX accountNameApplyAliasesMemo ? doesn't seem to make a difference
|
||
joinAccountNames parent
|
||
a
|
||
|
||
-- | Parse an account name. Account names start with a non-space, may
|
||
-- have single spaces inside them, and are terminated by two or more
|
||
-- spaces (or end of input). Also they have one or more components of
|
||
-- at least one character, separated by the account separator char.
|
||
-- (This parser will also consume one following space, if present.)
|
||
accountnamep :: TextParser m AccountName
|
||
accountnamep = do
|
||
astr <- do
|
||
c <- nonspace
|
||
cs <- striptrailingspace <$> many (nonspace <|> singlespace)
|
||
return $ c:cs
|
||
let a = T.pack astr
|
||
when (accountNameFromComponents (accountNameComponents a) /= a)
|
||
(fail $ "account name seems ill-formed: "++astr)
|
||
return a
|
||
where
|
||
singlespace = try (do {spacenonewline; do {notFollowedBy spacenonewline; return ' '}})
|
||
striptrailingspace "" = ""
|
||
striptrailingspace s = if last s == ' ' then init s else s
|
||
|
||
-- accountnamechar = notFollowedBy (oneOf "()[]") >> nonspace
|
||
-- <?> "account name character (non-bracket, non-parenthesis, non-whitespace)"
|
||
|
||
--- ** amounts
|
||
|
||
-- | Parse whitespace then an amount, with an optional left or right
|
||
-- currency symbol and optional price, or return the special
|
||
-- "missing" marker amount.
|
||
spaceandamountormissingp :: Monad m => JournalParser m MixedAmount
|
||
spaceandamountormissingp =
|
||
try (do
|
||
lift $ skipSome spacenonewline
|
||
(Mixed . (:[])) `fmap` amountp <|> return missingmixedamt
|
||
) <|> return missingmixedamt
|
||
|
||
#ifdef TESTS
|
||
assertParseEqual' :: (Show a, Eq a) => (Either ParseError a) -> a -> Assertion
|
||
assertParseEqual' parse expected = either (assertFailure.show) (`is'` expected) parse
|
||
|
||
is' :: (Eq a, Show a) => a -> a -> Assertion
|
||
a `is'` e = assertEqual e a
|
||
|
||
test_spaceandamountormissingp = do
|
||
assertParseEqual' (parseWithState mempty spaceandamountormissingp " $47.18") (Mixed [usd 47.18])
|
||
assertParseEqual' (parseWithState mempty spaceandamountormissingp "$47.18") missingmixedamt
|
||
assertParseEqual' (parseWithState mempty spaceandamountormissingp " ") missingmixedamt
|
||
assertParseEqual' (parseWithState mempty spaceandamountormissingp "") missingmixedamt
|
||
#endif
|
||
|
||
-- | Parse a single-commodity amount, with optional symbol on the left or
|
||
-- right, optional unit or total price, and optional (ignored)
|
||
-- ledger-style balance assertion or fixed lot price declaration.
|
||
amountp :: Monad m => JournalParser m Amount
|
||
amountp = try leftsymbolamountp <|> try rightsymbolamountp <|> nosymbolamountp
|
||
|
||
#ifdef TESTS
|
||
test_amountp = do
|
||
assertParseEqual' (parseWithState mempty amountp "$47.18") (usd 47.18)
|
||
assertParseEqual' (parseWithState mempty amountp "$1.") (usd 1 `withPrecision` 0)
|
||
-- ,"amount with unit price" ~: do
|
||
assertParseEqual'
|
||
(parseWithState mempty amountp "$10 @ €0.5")
|
||
(usd 10 `withPrecision` 0 `at` (eur 0.5 `withPrecision` 1))
|
||
-- ,"amount with total price" ~: do
|
||
assertParseEqual'
|
||
(parseWithState mempty amountp "$10 @@ €5")
|
||
(usd 10 `withPrecision` 0 @@ (eur 5 `withPrecision` 0))
|
||
#endif
|
||
|
||
-- | Parse an amount from a string, or get an error.
|
||
amountp' :: String -> Amount
|
||
amountp' s =
|
||
case runParser (evalStateT (amountp <* eof) mempty) "" (T.pack s) of
|
||
Right amt -> amt
|
||
Left err -> error' $ show err -- XXX should throwError
|
||
|
||
-- | Parse a mixed amount from a string, or get an error.
|
||
mamountp' :: String -> MixedAmount
|
||
mamountp' = Mixed . (:[]) . amountp'
|
||
|
||
signp :: TextParser m String
|
||
signp = do
|
||
sign <- optional $ oneOf ("+-" :: [Char])
|
||
return $ case sign of Just '-' -> "-"
|
||
_ -> ""
|
||
|
||
multiplierp :: TextParser m Bool
|
||
multiplierp = do
|
||
multiplier <- optional $ oneOf ("*" :: [Char])
|
||
return $ case multiplier of Just '*' -> True
|
||
_ -> False
|
||
|
||
-- | This is like skipMany but it returns True if at least one element
|
||
-- was skipped. This is helpful if you’re just using many to check if
|
||
-- the resulting list is empty or not.
|
||
skipMany' :: MonadPlus m => m a -> m Bool
|
||
skipMany' p = go False
|
||
where
|
||
go !isNull = do
|
||
more <- option False (True <$ p)
|
||
if more
|
||
then go True
|
||
else pure isNull
|
||
|
||
leftsymbolamountp :: Monad m => JournalParser m Amount
|
||
leftsymbolamountp = do
|
||
sign <- lift signp
|
||
m <- lift multiplierp
|
||
c <- lift commoditysymbolp
|
||
suggestedStyle <- getAmountStyle c
|
||
commodityspaced <- lift $ skipMany' spacenonewline
|
||
(q,prec,mdec,mgrps) <- lift $ numberp suggestedStyle
|
||
let s = amountstyle{ascommodityside=L, ascommodityspaced=commodityspaced, asprecision=prec, asdecimalpoint=mdec, asdigitgroups=mgrps}
|
||
p <- priceamountp
|
||
let applysign = if sign=="-" then negate else id
|
||
return $ applysign $ Amount c q p s m
|
||
<?> "left-symbol amount"
|
||
|
||
rightsymbolamountp :: Monad m => JournalParser m Amount
|
||
rightsymbolamountp = do
|
||
m <- lift multiplierp
|
||
sign <- lift signp
|
||
rawnum <- lift $ rawnumberp
|
||
expMod <- lift . option id $ try exponentp
|
||
commodityspaced <- lift $ skipMany' spacenonewline
|
||
c <- lift commoditysymbolp
|
||
suggestedStyle <- getAmountStyle c
|
||
let (q0,prec0,mdec,mgrps) = fromRawNumber suggestedStyle (sign == "-") rawnum
|
||
(q, prec) = expMod (q0, prec0)
|
||
p <- priceamountp
|
||
let s = amountstyle{ascommodityside=R, ascommodityspaced=commodityspaced, asprecision=prec, asdecimalpoint=mdec, asdigitgroups=mgrps}
|
||
return $ Amount c q p s m
|
||
<?> "right-symbol amount"
|
||
|
||
nosymbolamountp :: Monad m => JournalParser m Amount
|
||
nosymbolamountp = do
|
||
m <- lift multiplierp
|
||
suggestedStyle <- getDefaultAmountStyle
|
||
(q,prec,mdec,mgrps) <- lift $ numberp suggestedStyle
|
||
p <- priceamountp
|
||
-- apply the most recently seen default commodity and style to this commodityless amount
|
||
defcs <- getDefaultCommodityAndStyle
|
||
let (c,s) = case defcs of
|
||
Just (defc,defs) -> (defc, defs{asprecision=max (asprecision defs) prec})
|
||
Nothing -> ("", amountstyle{asprecision=prec, asdecimalpoint=mdec, asdigitgroups=mgrps})
|
||
return $ Amount c q p s m
|
||
<?> "no-symbol amount"
|
||
|
||
commoditysymbolp :: TextParser m CommoditySymbol
|
||
commoditysymbolp = (quotedcommoditysymbolp <|> simplecommoditysymbolp) <?> "commodity symbol"
|
||
|
||
quotedcommoditysymbolp :: TextParser m CommoditySymbol
|
||
quotedcommoditysymbolp = do
|
||
char '"'
|
||
s <- some $ noneOf (";\n\"" :: [Char])
|
||
char '"'
|
||
return $ T.pack s
|
||
|
||
simplecommoditysymbolp :: TextParser m CommoditySymbol
|
||
simplecommoditysymbolp = T.pack <$> some (noneOf nonsimplecommoditychars)
|
||
|
||
priceamountp :: Monad m => JournalParser m Price
|
||
priceamountp =
|
||
try (do
|
||
lift (skipMany spacenonewline)
|
||
char '@'
|
||
try (do
|
||
char '@'
|
||
lift (skipMany spacenonewline)
|
||
a <- amountp -- XXX can parse more prices ad infinitum, shouldn't
|
||
return $ TotalPrice a)
|
||
<|> (do
|
||
lift (skipMany spacenonewline)
|
||
a <- amountp -- XXX can parse more prices ad infinitum, shouldn't
|
||
return $ UnitPrice a))
|
||
<|> return NoPrice
|
||
|
||
partialbalanceassertionp :: Monad m => JournalParser m BalanceAssertion
|
||
partialbalanceassertionp =
|
||
try (do
|
||
lift (skipMany spacenonewline)
|
||
sourcepos <- genericSourcePos <$> lift getPosition
|
||
char '='
|
||
lift (skipMany spacenonewline)
|
||
a <- amountp -- XXX should restrict to a simple amount
|
||
return $ Just (a, sourcepos))
|
||
<|> return Nothing
|
||
|
||
-- balanceassertion :: Monad m => TextParser m (Maybe MixedAmount)
|
||
-- balanceassertion =
|
||
-- try (do
|
||
-- lift (skipMany spacenonewline)
|
||
-- string "=="
|
||
-- lift (skipMany spacenonewline)
|
||
-- a <- amountp -- XXX should restrict to a simple amount
|
||
-- return $ Just $ Mixed [a])
|
||
-- <|> return Nothing
|
||
|
||
-- http://ledger-cli.org/3.0/doc/ledger3.html#Fixing-Lot-Prices
|
||
fixedlotpricep :: Monad m => JournalParser m (Maybe Amount)
|
||
fixedlotpricep =
|
||
try (do
|
||
lift (skipMany spacenonewline)
|
||
char '{'
|
||
lift (skipMany spacenonewline)
|
||
char '='
|
||
lift (skipMany spacenonewline)
|
||
a <- amountp -- XXX should restrict to a simple amount
|
||
lift (skipMany spacenonewline)
|
||
char '}'
|
||
return $ Just a)
|
||
<|> return Nothing
|
||
|
||
-- | Parse a string representation of a number for its value and display
|
||
-- attributes.
|
||
--
|
||
-- Some international number formats are accepted, eg either period or comma
|
||
-- may be used for the decimal point, and the other of these may be used for
|
||
-- separating digit groups in the integer part. See
|
||
-- http://en.wikipedia.org/wiki/Decimal_separator for more examples.
|
||
--
|
||
-- This returns: the parsed numeric value, the precision (number of digits
|
||
-- seen following the decimal point), the decimal point character used if any,
|
||
-- and the digit group style if any.
|
||
--
|
||
numberp :: Maybe AmountStyle -> TextParser m (Quantity, Int, Maybe Char, Maybe DigitGroupStyle)
|
||
numberp suggestedStyle = do
|
||
-- a number is an optional sign followed by a sequence of digits possibly
|
||
-- interspersed with periods, commas, or both
|
||
-- ptrace "numberp"
|
||
sign <- signp
|
||
raw <- rawnumberp
|
||
dbg8 "numberp suggestedStyle" suggestedStyle `seq` return ()
|
||
let num@(q, prec, decSep, groups) = dbg8 "numberp quantity,precision,mdecimalpoint,mgrps" (fromRawNumber suggestedStyle (sign == "-") raw)
|
||
option num . try $ do
|
||
when (isJust groups) $ fail "groups and exponent are not mixable"
|
||
(q', prec') <- exponentp <*> pure (q, prec)
|
||
return (q', prec', decSep, groups)
|
||
<?> "numberp"
|
||
|
||
exponentp :: TextParser m ((Quantity, Int) -> (Quantity, Int))
|
||
exponentp = do
|
||
char' 'e'
|
||
exp <- liftM read $ (++) <$> signp <*> some digitChar
|
||
return $ (* 10^^exp) *** (0 `max`) . (+ (-exp))
|
||
<?> "exponentp"
|
||
|
||
-- | Interpret the raw parts of a number, using the provided amount style if any,
|
||
-- determining the decimal point character and digit groups where possible.
|
||
-- Returns:
|
||
-- - the decimal number
|
||
-- - the precision (number of digits after the decimal point)
|
||
-- - the decimal point character, if any
|
||
-- - the digit group style, if any (digit group character and sizes of digit groups)
|
||
fromRawNumber :: Maybe AmountStyle -> Bool -> (Maybe Char, [String], Maybe (Char, String)) -> (Quantity, Int, Maybe Char, Maybe DigitGroupStyle)
|
||
fromRawNumber suggestedStyle negated raw = (quantity, precision, mdecimalpoint, mgrps) where
|
||
-- unpack with a hint if useful
|
||
(mseparator, intparts, mdecimalpoint, frac) =
|
||
case raw of
|
||
-- just a single punctuation between two digits groups, assume it's a decimal point
|
||
(Just s, [firstGroup, lastGroup], Nothing)
|
||
-- if have a decimalHint restrict this assumpion only to a matching separator
|
||
| maybe True (`asdecimalcheck` s) suggestedStyle -> (Nothing, [firstGroup], Just s, lastGroup)
|
||
|
||
(firstSep, digitGroups, Nothing) -> (firstSep, digitGroups, Nothing, [])
|
||
(firstSep, digitGroups, Just (d, frac)) -> (firstSep, digitGroups, Just d, frac)
|
||
|
||
-- get the digit group sizes and digit group style if any
|
||
groupsizes = reverse $ case map length intparts of
|
||
(a:b:cs) | a < b -> b:cs
|
||
gs -> gs
|
||
mgrps = (`DigitGroups` groupsizes) <$> mseparator
|
||
|
||
-- put the parts back together without digit group separators, get the precision and parse the value
|
||
repr = (if negated then "-" else "") ++ "0" ++ concat intparts ++ (if null frac then "" else "." ++ frac)
|
||
quantity = read repr
|
||
precision = length frac
|
||
|
||
asdecimalcheck :: AmountStyle -> Char -> Bool
|
||
asdecimalcheck = \case
|
||
AmountStyle{asdecimalpoint = Just d} -> (d ==)
|
||
AmountStyle{asdigitgroups = Just (DigitGroups g _)} -> (g /=)
|
||
AmountStyle{asprecision = 0} -> const False
|
||
_ -> const True
|
||
|
||
-- | Pre-parse a number into parts for further interpretation.
|
||
-- Numbers may optionally have a period/comma decimal point
|
||
-- and/or comma/period/space digit group separators, but we don't
|
||
-- decide which is which here, just return the parts:
|
||
--
|
||
-- - the first separator char (period or comma or space) seen, if any
|
||
--
|
||
-- - the digit group(s), possibly several separated by the above char, occuring before..
|
||
--
|
||
-- - the second and last separator char, and following digit group, if any.
|
||
--
|
||
-- >>> parseTest rawnumberp "1,234,567.89"
|
||
-- (Just ',',["1","234","567"],Just ('.',"89"))
|
||
-- >>> parseTest rawnumberp "1 000"
|
||
-- (Just ' ',["1","000"],Nothing)
|
||
rawnumberp :: TextParser m ( Maybe Char , [String] , Maybe (Char, String) )
|
||
rawnumberp = do
|
||
let sepChars = ['.', ','] -- all allowed punctuation characters
|
||
|
||
(firstSep, groups) <- option (Nothing, []) $ do
|
||
leadingDigits <- some digitChar
|
||
option (Nothing, [leadingDigits]) . try $ do
|
||
firstSep <- oneOf sepChars <|> whitespaceChar
|
||
groups <- some digitChar `sepBy1` char firstSep
|
||
return (Just firstSep, leadingDigits : groups)
|
||
|
||
let remSepChars = maybe sepChars (`delete` sepChars) firstSep
|
||
modifier
|
||
| null groups = fmap Just -- if no digits so far, we require at least some decimals
|
||
| otherwise = optional
|
||
|
||
extraGroup <- modifier $ do
|
||
lastSep <- oneOf remSepChars
|
||
digits <- modifier $ some digitChar -- decimal separator allowed to be without digits if had some before
|
||
return (lastSep, fromMaybe [] digits)
|
||
|
||
-- make sure we didn't leading part of mistyped number
|
||
notFollowedBy $ oneOf sepChars <|> (whitespaceChar >> digitChar)
|
||
|
||
return $ dbg8 "rawnumberp" (firstSep, groups, extraGroup)
|
||
<?> "rawnumberp"
|
||
|
||
-- | Parse a unicode char that represents any non-control space char (Zs general category).
|
||
whitespaceChar :: TextParser m Char
|
||
whitespaceChar = charCategory Space
|
||
|
||
-- test_numberp = do
|
||
-- let s `is` n = assertParseEqual (parseWithState mempty numberp s) n
|
||
-- assertFails = assertBool . isLeft . parseWithState mempty numberp
|
||
-- assertFails ""
|
||
-- "0" `is` (0, 0, '.', ',', [])
|
||
-- "1" `is` (1, 0, '.', ',', [])
|
||
-- "1.1" `is` (1.1, 1, '.', ',', [])
|
||
-- "1,000.1" `is` (1000.1, 1, '.', ',', [3])
|
||
-- "1.00.000,1" `is` (100000.1, 1, ',', '.', [3,2])
|
||
-- "1,000,000" `is` (1000000, 0, '.', ',', [3,3])
|
||
-- "1." `is` (1, 0, '.', ',', [])
|
||
-- "1," `is` (1, 0, ',', '.', [])
|
||
-- ".1" `is` (0.1, 1, '.', ',', [])
|
||
-- ",1" `is` (0.1, 1, ',', '.', [])
|
||
-- assertFails "1,000.000,1"
|
||
-- assertFails "1.000,000.1"
|
||
-- assertFails "1,000.000.1"
|
||
-- assertFails "1,,1"
|
||
-- assertFails "1..1"
|
||
-- assertFails ".1,"
|
||
-- assertFails ",1."
|
||
|
||
--- ** comments
|
||
|
||
multilinecommentp :: JournalParser m ()
|
||
multilinecommentp = startComment *> anyLine `skipManyTill` endComment
|
||
where
|
||
startComment = string "comment" >> emptyLine
|
||
endComment = eof <|> (string "end comment" >> emptyLine)
|
||
emptyLine = void $ lift (skipMany spacenonewline) *> newline
|
||
anyLine = anyChar `manyTill` newline
|
||
|
||
emptyorcommentlinep :: JournalParser m ()
|
||
emptyorcommentlinep = do
|
||
lift $ skipMany spacenonewline
|
||
void linecommentp <|> void newline
|
||
|
||
-- | Parse a possibly multi-line comment following a semicolon.
|
||
followingcommentp :: JournalParser m Text
|
||
followingcommentp = T.unlines . map snd <$> followingcommentlinesp
|
||
|
||
followingcommentlinesp :: JournalParser m [(SourcePos, Text)]
|
||
followingcommentlinesp = do
|
||
lift $ skipMany spacenonewline
|
||
samelineComment <- try commentp
|
||
<|> (,) <$> (getPosition <* newline) <*> pure ""
|
||
newlineComments <- many $ try $ do
|
||
lift $ skipSome spacenonewline -- leading whitespace is required
|
||
commentp
|
||
pure $ samelineComment : newlineComments
|
||
|
||
-- | Parse a possibly multi-line comment following a semicolon, and
|
||
-- any tags and/or posting dates within it. Posting dates can be
|
||
-- expressed with "date"/"date2" tags and/or bracketed dates. The
|
||
-- dates are parsed in full here so that errors are reported in the
|
||
-- right position. Missing years can be inferred if a default date is
|
||
-- provided.
|
||
--
|
||
-- >>> rejp (followingcommentandtagsp (Just $ fromGregorian 2000 1 2)) "; a:b, date:3/4, [=5/6]"
|
||
-- Right ("a:b, date:3/4, [=5/6]\n",[("a","b"),("date","3/4")],Just 2000-03-04,Just 2000-05-06)
|
||
--
|
||
-- Year unspecified and no default provided -> unknown year error, at correct position:
|
||
-- >>> rejp (followingcommentandtagsp Nothing) " ; xxx date:3/4\n ; second line"
|
||
-- Left ...1:22...partial date 3/4 found, but the current year is unknown...
|
||
--
|
||
-- Date tag value contains trailing text - forgot the comma, confused:
|
||
-- the syntaxes ? We'll accept the leading date anyway
|
||
-- >>> rejp (followingcommentandtagsp (Just $ fromGregorian 2000 1 2)) "; date:3/4=5/6"
|
||
-- Right ("date:3/4=5/6\n",[("date","3/4=5/6")],Just 2000-03-04,Nothing)
|
||
--
|
||
followingcommentandtagsp :: MonadIO m => Maybe Day
|
||
-> ErroringJournalParser m (Text, [Tag], Maybe Day, Maybe Day)
|
||
followingcommentandtagsp mdefdate = do
|
||
-- pdbg 0 "followingcommentandtagsp"
|
||
|
||
commentLines <- followingcommentlinesp
|
||
-- pdbg 0 $ "commentws:" ++ show commentLines
|
||
|
||
-- Reparse the comment for any tags.
|
||
tags <- case traverse (runTextParserAt tagsp) commentLines of
|
||
Right tss -> pure $ concat tss
|
||
Left e -> throwError $ parseErrorPretty e
|
||
|
||
-- Reparse the comment for any posting dates.
|
||
-- Use the transaction date for defaults, if provided.
|
||
epdates <- fmap sequence
|
||
$ traverse (runErroringJournalParserAt (postingdatesp mdefdate))
|
||
commentLines
|
||
pdates <- case epdates of
|
||
Right dss -> pure $ concat dss
|
||
Left e -> throwError e
|
||
-- pdbg 0 $ "pdates: "++show pdates
|
||
let mdate = headMay $ map snd $ filter ((=="date") .fst) pdates
|
||
mdate2 = headMay $ map snd $ filter ((=="date2").fst) pdates
|
||
|
||
let strippedComment = T.unlines $ map (T.strip . snd) commentLines
|
||
-- pdbg 0 $ "comment:"++show strippedComment
|
||
|
||
pure (strippedComment, tags, mdate, mdate2)
|
||
|
||
where
|
||
runTextParserAt parser (pos, txt) =
|
||
runTextParser (setPosition pos *> parser) txt
|
||
runErroringJournalParserAt parser (pos, txt) =
|
||
runErroringJournalParser (setPosition pos *> parser) txt
|
||
|
||
-- A transaction/posting comment must start with a semicolon.
|
||
-- This parser discards the leading whitespace of the comment
|
||
-- and returns the source position of the comment's first non-whitespace character.
|
||
commentp :: JournalParser m (SourcePos, Text)
|
||
commentp = commentStartingWithp ";"
|
||
|
||
-- A line (file-level) comment can start with a semicolon, hash,
|
||
-- or star (allowing org nodes).
|
||
-- This parser discards the leading whitespace of the comment
|
||
-- and returns the source position of the comment's first non-whitespace character.
|
||
linecommentp :: JournalParser m (SourcePos, Text)
|
||
linecommentp = commentStartingWithp ";#*"
|
||
|
||
commentStartingWithp :: [Char] -> JournalParser m (SourcePos, Text)
|
||
commentStartingWithp cs = do
|
||
-- ptrace "commentStartingWith"
|
||
oneOf cs
|
||
lift (skipMany spacenonewline)
|
||
startPos <- getPosition
|
||
content <- T.pack <$> anyChar `manyTill` (lift eolof)
|
||
optional newline
|
||
return (startPos, content)
|
||
|
||
--- ** tags
|
||
|
||
-- | Extract any tags (name:value ended by comma or newline) embedded in a string.
|
||
--
|
||
-- >>> commentTags "a b:, c:c d:d, e"
|
||
-- [("b",""),("c","c d:d")]
|
||
--
|
||
-- >>> commentTags "a [1/1/1] [1/1] [1], [=1/1/1] [=1/1] [=1] [1/1=1/1/1] [1=1/1/1] b:c"
|
||
-- [("b","c")]
|
||
--
|
||
-- --[("date","1/1/1"),("date","1/1"),("date2","1/1/1"),("date2","1/1"),("date","1/1"),("date2","1/1/1"),("date","1"),("date2","1/1/1")]
|
||
--
|
||
-- >>> commentTags "\na b:, \nd:e, f"
|
||
-- [("b",""),("d","e")]
|
||
--
|
||
commentTags :: Text -> [Tag]
|
||
commentTags s =
|
||
case runTextParser tagsp s of
|
||
Right r -> r
|
||
Left _ -> [] -- shouldn't happen
|
||
|
||
-- | Parse all tags found in a string.
|
||
tagsp :: SimpleTextParser [Tag]
|
||
tagsp = -- do
|
||
-- pdbg 0 $ "tagsp"
|
||
many (try (nontagp >> tagp))
|
||
|
||
-- | Parse everything up till the first tag.
|
||
--
|
||
-- >>> rtp nontagp "\na b:, \nd:e, f"
|
||
-- Right "\na "
|
||
nontagp :: SimpleTextParser String
|
||
nontagp = -- do
|
||
-- pdbg 0 "nontagp"
|
||
-- anyChar `manyTill` (lookAhead (try (tagorbracketeddatetagsp Nothing >> return ()) <|> eof))
|
||
anyChar `manyTill` lookAhead (try (void tagp) <|> eof)
|
||
-- XXX costly ?
|
||
|
||
-- | Tags begin with a colon-suffixed tag name (a word beginning with
|
||
-- a letter) and are followed by a tag value (any text up to a comma
|
||
-- or newline, whitespace-stripped).
|
||
--
|
||
-- >>> rtp tagp "a:b b , c AuxDate: 4/2"
|
||
-- Right ("a","b b")
|
||
--
|
||
tagp :: SimpleTextParser Tag
|
||
tagp = do
|
||
-- pdbg 0 "tagp"
|
||
n <- tagnamep
|
||
v <- tagvaluep
|
||
return (n,v)
|
||
|
||
-- |
|
||
-- >>> rtp tagnamep "a:"
|
||
-- Right "a"
|
||
tagnamep :: SimpleTextParser Text
|
||
tagnamep = -- do
|
||
-- pdbg 0 "tagnamep"
|
||
T.pack <$> some (noneOf (": \t\n" :: [Char])) <* char ':'
|
||
|
||
tagvaluep :: TextParser m Text
|
||
tagvaluep = do
|
||
-- ptrace "tagvalue"
|
||
v <- anyChar `manyTill` (void (try (char ',')) <|> eolof)
|
||
return $ T.pack $ strip $ reverse $ dropWhile (==',') $ reverse $ strip v
|
||
|
||
--- ** posting dates
|
||
|
||
-- | Parse all posting dates found in a string. Posting dates can be
|
||
-- expressed with date/date2 tags and/or bracketed dates. The dates
|
||
-- are parsed fully to give useful errors. Missing years can be
|
||
-- inferred only if a default date is provided.
|
||
--
|
||
postingdatesp :: Monad m => Maybe Day -> ErroringJournalParser m [(TagName,Day)]
|
||
postingdatesp mdefdate = do
|
||
-- pdbg 0 $ "postingdatesp"
|
||
let p = ((:[]) <$> datetagp mdefdate) <|> bracketeddatetagsp mdefdate
|
||
nonp =
|
||
many (notFollowedBy p >> anyChar)
|
||
-- anyChar `manyTill` (lookAhead (try (p >> return ()) <|> eof))
|
||
concat <$> many (try (nonp >> p))
|
||
|
||
--- ** date tags
|
||
|
||
-- | Date tags are tags with name "date" or "date2". Their value is
|
||
-- parsed as a date, using the provided default date if any for
|
||
-- inferring a missing year if needed. Any error in date parsing is
|
||
-- reported and terminates parsing.
|
||
--
|
||
-- >>> rejp (datetagp Nothing) "date: 2000/1/2 "
|
||
-- Right ("date",2000-01-02)
|
||
--
|
||
-- >>> rejp (datetagp (Just $ fromGregorian 2001 2 3)) "date2:3/4"
|
||
-- Right ("date2",2001-03-04)
|
||
--
|
||
-- >>> rejp (datetagp Nothing) "date: 3/4"
|
||
-- Left ...1:9...partial date 3/4 found, but the current year is unknown...
|
||
--
|
||
datetagp :: Monad m => Maybe Day -> ErroringJournalParser m (TagName,Day)
|
||
datetagp mdefdate = do
|
||
-- pdbg 0 "datetagp"
|
||
string "date"
|
||
n <- fromMaybe "" <$> optional (mptext "2")
|
||
char ':'
|
||
startpos <- getPosition
|
||
v <- lift tagvaluep
|
||
-- re-parse value as a date.
|
||
j <- get
|
||
let ep :: Either (ParseError Char MPErr) Day
|
||
ep = parseWithState'
|
||
j{jparsedefaultyear=first3.toGregorian <$> mdefdate}
|
||
-- The value extends to a comma, newline, or end of file.
|
||
-- It seems like ignoring any extra stuff following a date
|
||
-- gives better errors here.
|
||
(do
|
||
setPosition startpos
|
||
datep) -- <* eof)
|
||
v
|
||
case ep
|
||
of Left e -> throwError $ parseErrorPretty e
|
||
Right d -> return ("date"<>n, d)
|
||
|
||
--- ** bracketed dates
|
||
|
||
-- tagorbracketeddatetagsp :: Monad m => Maybe Day -> TextParser u m [Tag]
|
||
-- tagorbracketeddatetagsp mdefdate =
|
||
-- bracketeddatetagsp mdefdate <|> ((:[]) <$> tagp)
|
||
|
||
-- | Parse Ledger-style bracketed posting dates ([DATE=DATE2]), as
|
||
-- "date" and/or "date2" tags. Anything that looks like an attempt at
|
||
-- this (a square-bracketed sequence of 0123456789/-.= containing at
|
||
-- least one digit and one date separator) is also parsed, and will
|
||
-- throw an appropriate error.
|
||
--
|
||
-- The dates are parsed in full here so that errors are reported in
|
||
-- the right position. A missing year in DATE can be inferred if a
|
||
-- default date is provided. A missing year in DATE2 will be inferred
|
||
-- from DATE.
|
||
--
|
||
-- >>> rejp (bracketeddatetagsp Nothing) "[2016/1/2=3/4]"
|
||
-- Right [("date",2016-01-02),("date2",2016-03-04)]
|
||
--
|
||
-- >>> rejp (bracketeddatetagsp Nothing) "[1]"
|
||
-- Left ...not a bracketed date...
|
||
--
|
||
-- >>> rejp (bracketeddatetagsp Nothing) "[2016/1/32]"
|
||
-- Left ...1:11:...bad date: 2016/1/32...
|
||
--
|
||
-- >>> rejp (bracketeddatetagsp Nothing) "[1/31]"
|
||
-- Left ...1:6:...partial date 1/31 found, but the current year is unknown...
|
||
--
|
||
-- >>> rejp (bracketeddatetagsp Nothing) "[0123456789/-.=/-.=]"
|
||
-- Left ...1:15:...bad date, different separators...
|
||
--
|
||
bracketeddatetagsp :: Monad m => Maybe Day -> ErroringJournalParser m [(TagName, Day)]
|
||
bracketeddatetagsp mdefdate = do
|
||
-- pdbg 0 "bracketeddatetagsp"
|
||
char '['
|
||
startpos <- getPosition
|
||
let digits = "0123456789"
|
||
s <- some (oneOf $ '=':digits++datesepchars)
|
||
char ']'
|
||
unless (any (`elem` s) digits && any (`elem` datesepchars) s) $
|
||
fail "not a bracketed date"
|
||
|
||
-- looks sufficiently like a bracketed date, now we
|
||
-- re-parse as dates and throw any errors
|
||
j <- get
|
||
let ep :: Either (ParseError Char MPErr) (Maybe Day, Maybe Day)
|
||
ep = parseWithState'
|
||
j{jparsedefaultyear=first3.toGregorian <$> mdefdate}
|
||
(do
|
||
setPosition startpos
|
||
md1 <- optional datep
|
||
maybe (return ()) (setYear.first3.toGregorian) md1
|
||
md2 <- optional $ char '=' >> datep
|
||
eof
|
||
return (md1,md2)
|
||
)
|
||
(T.pack s)
|
||
case ep
|
||
of Left e -> throwError $ parseErrorPretty e
|
||
Right (md1,md2) -> return $ catMaybes
|
||
[("date",) <$> md1, ("date2",) <$> md2]
|
||
|