Comments (4)
Sorry for the slow response. I would be happy to add these functions with correct rounding behavior. I'm not too fussed about matching read
's behavior in other respects.
from bytestring.
This is currently covered by Data.ByteString.Lex.Fractional
, but I don't see fundamental reasons why not have it in bytestring
proper.
from bytestring.
Checking it out, Data.ByteString.Lex.Fractional
provides no way to parse "NaN"
and "Infinity"
, which are supported by read
. It also appears to sacrifice precision (for speed?) but makes no mention of it in the docs.
ghci> :m + Data.Maybe Data.ByteString.Lex.Fractional Data.ByteString.Char8
ghci> readbslex :: String -> Double; readbslex = fst . fromJust . readExponential . pack
ghci> readbslex "12.3e-2" == readbslex "123e-3"
False
ghci> readDbl :: String -> Double; readDbl = read
ghci> readDbl "12.3e-2" == readDbl "123e-3"
True
If we have this function in bytestring
I feel it would be best to match read
's behavior (and not just use bytestring-lexing
's implementation).
from bytestring.
Makes sense to me. @clyring what do you think?
from bytestring.
Related Issues (20)
- bytestring-0.11.5.1 (ghc-9.4.6) fails to build on Fedora HOT 4
- isValidUtf8 is broken HOT 4
- Compatibility with GHC's JavaScript backend HOT 1
- Overhaul Data.ByteString.Builder.RealFloat HOT 5
- Float and Double standard with precision 0 outputs incorrectly HOT 2
- Positive and Negative Zero Print Incorrect Precision
- Guidelines for using with WriterT HOT 2
- RealFloat Zero Padded Exponent HOT 7
- Faster Printing for Known Normal and Subnormal IEEE754 Floating Point Values
- Broken links in haddocks of `ShortByteString` HOT 1
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- Drop support for GHCs older than 8.4 HOT 1
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- 0.12.1.0 fails to build on darwin aarch64 with GHC-8.10.7 HOT 13
- Create strict bytestrings from FixedPrim with zero copy HOT 6
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- unsafeUseAsCString(Len) may return a NULL pointer. HOT 9
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from bytestring.