Copyright	(c) The University of Glasgow 1994-2002
License	see libraries/base/LICENSE
Safe Haskell	Trustworthy
Language	Haskell2010

Data.Text.Lazy.Builder.RealFloat

Description

Write a floating point value to a Builder.

Synopsis

data FPFormat
- = Exponent
- | Fixed
- | Generic
realFloat :: RealFloat a => a -> Builder
formatRealFloat :: RealFloat a => FPFormat -> Maybe Int -> a -> Builder

Documentation

data FPFormat Source #

Control the rendering of floating point numbers.

Constructors

Exponent	Scientific notation (e.g. `2.3e123`).
Fixed	Standard decimal notation.
Generic	Use decimal notation for values between `0.1` and `9,999,999`, and scientific notation otherwise.

Instances

Instances details

Enum FPFormat #
Instance details Defined in Data.Text.Lazy.Builder.RealFloat Methods succ :: FPFormat -> FPFormat Source # pred :: FPFormat -> FPFormat Source # toEnum :: Int -> FPFormat Source # fromEnum :: FPFormat -> Int Source # enumFrom :: FPFormat -> [FPFormat] Source # enumFromThen :: FPFormat -> FPFormat -> [FPFormat] Source # enumFromTo :: FPFormat -> FPFormat -> [FPFormat] Source # enumFromThenTo :: FPFormat -> FPFormat -> FPFormat -> [FPFormat] Source #
Read FPFormat #
Instance details Defined in Data.Text.Lazy.Builder.RealFloat Methods readsPrec :: Int -> ReadS FPFormat Source # readList :: ReadS [FPFormat] Source # readPrec :: ReadPrec FPFormat Source # readListPrec :: ReadPrec [FPFormat] Source #
Show FPFormat #
Instance details Defined in Data.Text.Lazy.Builder.RealFloat Methods showsPrec :: Int -> FPFormat -> ShowS Source # show :: FPFormat -> String Source # showList :: [FPFormat] -> ShowS Source #

realFloat :: RealFloat a => a -> Builder Source #

Show a signed RealFloat value to full precision, using standard decimal notation for arguments whose absolute value lies between 0.1 and 9,999,999, and scientific notation otherwise.

formatRealFloat Source #

Arguments

:: RealFloat a
=> FPFormat
-> Maybe Int	Number of decimal places to render.
-> a
-> Builder

Encode a signed RealFloat according to FPFormat and optionally requested precision.

This corresponds to the show{E,F,G}Float operations provided by base's Numeric module.

NOTE: The functions in base-4.12 changed the serialisation in case of a Just 0 precision; this version of text still provides the serialisation as implemented in base-4.11. The next major version of text will switch to the more correct base-4.12 serialisation.