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parsing: don't accept . as a valid amount

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This commit is contained in:
Simon Michael 2014-03-01 10:26:20 -08:00
parent dcdb032d96
commit 4b4715ab76
1 changed files with 14 additions and 13 deletions
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27
hledger-lib/Hledger/Read/JournalReader.hs
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@ -751,20 +751,21 @@ numberp = do
sign <- optionMaybe $ string "-"
parts <- many1 $ choice' [many1 digit, many1 $ char ',', many1 $ char '.']
let numeric = isNumber . headDef '_'
(_, puncparts) = partition numeric parts
(numparts, puncparts) = partition numeric parts
(ok,decimalpoint',separator') =
case puncparts of
[] -> (True, Nothing, Nothing) -- no punctuation chars
[d:""] -> (True, Just d, Nothing) -- just one punctuation char, assume it's a decimal point
[_] -> (False, Nothing, Nothing) -- adjacent punctuation chars, not ok
_:_:_ -> let (s:ss, d) = (init puncparts, last puncparts) -- two or more punctuation chars
in if (any ((/=1).length) puncparts -- adjacent punctuation chars, not ok
|| any (s/=) ss -- separator chars differ, not ok
|| head parts == s) -- number begins with a separator char, not ok
then (False, Nothing, Nothing)
else if s == d
then (True, Nothing, Just $ head s) -- just one kind of punctuation, assume separator chars
else (True, Just $ head d, Just $ head s) -- separators and a decimal point
case (numparts,puncparts) of
([],_) -> (False, Nothing, Nothing) -- no digits
(_,[]) -> (True, Nothing, Nothing) -- no punctuation chars
(_,[d:""]) -> (True, Just d, Nothing) -- just one punctuation char, assume it's a decimal point
(_,[_]) -> (False, Nothing, Nothing) -- adjacent punctuation chars, not ok
(_,_:_:_) -> let (s:ss, d) = (init puncparts, last puncparts) -- two or more punctuation chars
in if (any ((/=1).length) puncparts -- adjacent punctuation chars, not ok
|| any (s/=) ss -- separator chars differ, not ok
|| head parts == s) -- number begins with a separator char, not ok
then (False, Nothing, Nothing)
else if s == d
then (True, Nothing, Just $ head s) -- just one kind of punctuation, assume separator chars
else (True, Just $ head d, Just $ head s) -- separators and a decimal point
when (not ok) (fail $ "number seems ill-formed: "++concat parts)
let (intparts',fracparts') = span ((/= decimalpoint') . Just . head) parts
(intparts, fracpart) = (filter numeric intparts', filter numeric fracparts')