name: scientific version: 0.3.0.0 synopsis: Numbers represented using scientific notation description: @Data.Scientific@ provides a space efficient and arbitrary precision scientific number type. . 'Scientific' numbers are represented using . It uses a coefficient @c :: 'Integer'@ and a base-10 exponent @e :: 'Int'@ (do note that since we're using an 'Int' to represent the exponent these numbers aren't truly arbitrary precision). A scientific number corresponds to the 'Fractional' number: @'fromInteger' c * 10 '^^' e@. . 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 numbers only need to be normalized, i.e. @10000000@ to @1e7@. . * '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. homepage: https://github.com/basvandijk/scientific bug-reports: https://github.com/basvandijk/scientific/issues license: BSD3 license-file: LICENSE author: Bas van Dijk maintainer: Bas van Dijk category: Data build-type: Simple cabal-version: >=1.10 source-repository head type: git location: git://github.com/basvandijk/scientific.git library exposed-modules: Data.Scientific Data.Text.Lazy.Builder.Scientific Data.ByteString.Builder.Scientific other-extensions: DeriveDataTypeable, BangPatterns ghc-options: -Wall build-depends: base >= 4.3 && < 4.8 , deepseq >= 1.3 && < 1.4 , text >= 0.8 && < 1.3 , bytestring >= 0.10 && < 0.11 , hashable >= 1.1.2 && < 1.3 , arithmoi >= 0.4.1 && < 0.5 , array >= 0.1 && < 0.6 hs-source-dirs: src default-language: Haskell2010 test-suite test-scientific type: exitcode-stdio-1.0 hs-source-dirs: test main-is: test.hs default-language: Haskell2010 ghc-options: -Wall build-depends: scientific , base >= 4.3 && < 4.8 , tasty >= 0.3.1 && < 0.9 , tasty-smallcheck >= 0.2 && < 0.9 , tasty-quickcheck >= 0.8 && < 0.9 , smallcheck >= 1.0 && < 1.2 , QuickCheck >= 2.7 && < 2.8 , text >= 0.8 && < 1.3 , bytestring >= 0.10 && < 0.11 benchmark bench-scientific type: exitcode-stdio-1.0 hs-source-dirs: bench main-is: bench.hs default-language: Haskell2010 ghc-options: -O2 build-depends: scientific , base >= 4.3 && < 4.8 , criterion >= 0.5 && < 0.12