Data.Text.Lazy.Builder.RealFloat

Write a floating point value to a Builder.

Documentation

data FPFormat

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

Enum FPFormat

Defined in Data.Text.Lazy.Builder.RealFloat

Methods

succ :: FPFormat -> FPFormat

pred :: FPFormat -> FPFormat

toEnum :: Int -> FPFormat

fromEnum :: FPFormat -> Int

enumFrom :: FPFormat -> [FPFormat]

enumFromThen :: FPFormat -> FPFormat -> [FPFormat]

enumFromTo :: FPFormat -> FPFormat -> [FPFormat]

enumFromThenTo :: FPFormat -> FPFormat -> FPFormat -> [FPFormat]

Read FPFormat

Defined in Data.Text.Lazy.Builder.RealFloat

Methods

readsPrec :: Int -> ReadS FPFormat

readList :: ReadS [FPFormat]

readPrec :: ReadPrec FPFormat

readListPrec :: ReadPrec [FPFormat]

Show FPFormat

Defined in Data.Text.Lazy.Builder.RealFloat

Methods

showsPrec :: Int -> FPFormat -> ShowS

show :: FPFormat -> String

showList :: [FPFormat] -> ShowS

realFloat :: RealFloat a => a -> Builder

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

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.