/var/lib/ghc/package.conf.d/scientific-0.3.5.2.conf is in libghc-scientific-dev 0.3.5.2-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | name: scientific
version: 0.3.5.2
id: scientific-0.3.5.2-FM2NdrNTcdbCDq9wuNnhIA
key: scientific-0.3.5.2-FM2NdrNTcdbCDq9wuNnhIA
license: BSD3
maintainer: Bas van Dijk <v.dijk.bas@gmail.com>
homepage: https://github.com/basvandijk/scientific
synopsis: Numbers represented using scientific notation
description:
@Data.Scientific@ provides the number type 'Scientific'. Scientific numbers are
arbitrary precision and space efficient. They are represented using
<http://en.wikipedia.org/wiki/Scientific_notation scientific notation>.
The implementation uses a coefficient @c :: 'Integer'@ and a base-10 exponent
@e :: 'Int'@. A scientific number corresponds to the
'Fractional' number: @'fromInteger' c * 10 '^^' e@.
.
Note that since we're using an 'Int' to represent the exponent these numbers
aren't truly arbitrary precision. I intend to change the type of the exponent
to 'Integer' in a future release.
.
The main application of 'Scientific' is to be used as the target of parsing
arbitrary precision numbers coming from an untrusted source. The advantages
over using 'Rational' for this are that:
.
* A 'Scientific' is more efficient to construct. Rational numbers need to be
constructed using '%' which has to compute the 'gcd' of the 'numerator' and
'denominator'.
.
* 'Scientific' is safe against numbers with huge exponents. For example:
@1e1000000000 :: 'Rational'@ will fill up all space and crash your
program. Scientific works as expected:
.
> > read "1e1000000000" :: Scientific
> 1.0e1000000000
.
* Also, the space usage of converting scientific numbers with huge exponents to
@'Integral's@ (like: 'Int') or @'RealFloat's@ (like: 'Double' or 'Float')
will always be bounded by the target type.
category: Data
author: Bas van Dijk
exposed: True
exposed-modules:
Data.ByteString.Builder.Scientific Data.Scientific
Data.Text.Lazy.Builder.Scientific
hidden-modules: GHC.Integer.Compat Utils
abi: 76ce8c83ca49e2f0420693920b4e2dae
trusted: False
import-dirs: /usr/lib/haskell-packages/ghc/lib/x86_64-linux-ghc-8.0.2/scientific-0.3.5.2-FM2NdrNTcdbCDq9wuNnhIA
library-dirs: /usr/lib/haskell-packages/ghc/lib/x86_64-linux-ghc-8.0.2/scientific-0.3.5.2-FM2NdrNTcdbCDq9wuNnhIA
dynamic-library-dirs: /usr/lib/haskell-packages/ghc/lib/x86_64-linux-ghc-8.0.2
data-dir: /usr/share/scientific
hs-libraries: HSscientific-0.3.5.2-FM2NdrNTcdbCDq9wuNnhIA
depends:
base-4.9.1.0 binary-0.8.3.0 bytestring-0.10.8.1 containers-0.5.7.1
deepseq-1.4.2.0 hashable-1.2.6.1-2ZLNuHq395GGIHwEHuqZol
integer-gmp-1.0.0.1 integer-logarithms-1.0.2-92lMiWV9mmYAwfMEYgfQ0D
primitive-0.6.2.0-4578caNkWQ54Gt1mxLF2Yh
text-1.2.2.2-9UQZjEJZQFSGMffj1Z5g00
haddock-interfaces: /usr/lib/ghc-doc/haddock/scientific-0.3.5.2/scientific.haddock
haddock-html: /usr/share/doc/libghc-scientific-doc/html/
|