base-4.9.1.0: Basic libraries

Copyright(c) Ashley Yakeley 2005 2006 2009
LicenseBSD-style (see the file libraries/base/LICENSE)
MaintainerAshley Yakeley <ashley@semantic.org>
Stabilityexperimental
Portabilityportable
Safe HaskellTrustworthy
LanguageHaskell2010

Data.Fixed

Description

This module defines a "Fixed" type for fixed-precision arithmetic. The parameter to Fixed is any type that's an instance of HasResolution. HasResolution has a single method that gives the resolution of the Fixed type.

This module also contains generalisations of div, mod, and divmod to work with any Real instance.

Synopsis

Documentation

div' :: (Real a, Integral b) => a -> a -> b #

generalisation of div to any instance of Real

mod' :: Real a => a -> a -> a #

generalisation of mod to any instance of Real

divMod' :: (Real a, Integral b) => a -> a -> (b, a) #

generalisation of divMod to any instance of Real

newtype Fixed a #

The type parameter should be an instance of HasResolution.

Constructors

MkFixed Integer

Since: 4.7.0.0

Instances

Enum (Fixed a) # 

Methods

succ :: Fixed a -> Fixed a #

pred :: Fixed a -> Fixed a #

toEnum :: Int -> Fixed a #

fromEnum :: Fixed a -> Int #

enumFrom :: Fixed a -> [Fixed a] #

enumFromThen :: Fixed a -> Fixed a -> [Fixed a] #

enumFromTo :: Fixed a -> Fixed a -> [Fixed a] #

enumFromThenTo :: Fixed a -> Fixed a -> Fixed a -> [Fixed a] #

Eq (Fixed a) # 

Methods

(==) :: Fixed a -> Fixed a -> Bool Source #

(/=) :: Fixed a -> Fixed a -> Bool Source #

HasResolution a => Fractional (Fixed a) # 

Methods

(/) :: Fixed a -> Fixed a -> Fixed a #

recip :: Fixed a -> Fixed a #

fromRational :: Rational -> Fixed a #

Typeable * a => Data (Fixed a) # 

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Fixed a -> c (Fixed a) #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Fixed a) #

toConstr :: Fixed a -> Constr #

dataTypeOf :: Fixed a -> DataType #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c (Fixed a)) #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Fixed a)) #

gmapT :: (forall b. Data b => b -> b) -> Fixed a -> Fixed a #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Fixed a -> r #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Fixed a -> r #

gmapQ :: (forall d. Data d => d -> u) -> Fixed a -> [u] #

gmapQi :: Int -> (forall d. Data d => d -> u) -> Fixed a -> u #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> Fixed a -> m (Fixed a) #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Fixed a -> m (Fixed a) #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Fixed a -> m (Fixed a) #

HasResolution a => Num (Fixed a) # 

Methods

(+) :: Fixed a -> Fixed a -> Fixed a #

(-) :: Fixed a -> Fixed a -> Fixed a #

(*) :: Fixed a -> Fixed a -> Fixed a #

negate :: Fixed a -> Fixed a #

abs :: Fixed a -> Fixed a #

signum :: Fixed a -> Fixed a #

fromInteger :: Integer -> Fixed a #

Ord (Fixed a) # 

Methods

compare :: Fixed a -> Fixed a -> Ordering Source #

(<) :: Fixed a -> Fixed a -> Bool Source #

(<=) :: Fixed a -> Fixed a -> Bool Source #

(>) :: Fixed a -> Fixed a -> Bool Source #

(>=) :: Fixed a -> Fixed a -> Bool Source #

max :: Fixed a -> Fixed a -> Fixed a Source #

min :: Fixed a -> Fixed a -> Fixed a Source #

HasResolution a => Read (Fixed a) # 
HasResolution a => Real (Fixed a) # 

Methods

toRational :: Fixed a -> Rational #

HasResolution a => RealFrac (Fixed a) # 

Methods

properFraction :: Integral b => Fixed a -> (b, Fixed a) #

truncate :: Integral b => Fixed a -> b #

round :: Integral b => Fixed a -> b #

ceiling :: Integral b => Fixed a -> b #

floor :: Integral b => Fixed a -> b #

HasResolution a => Show (Fixed a) # 

Methods

showsPrec :: Int -> Fixed a -> ShowS #

show :: Fixed a -> String #

showList :: [Fixed a] -> ShowS #

class HasResolution a where #

Minimal complete definition

resolution

Methods

resolution :: p a -> Integer #

Instances

showFixed :: HasResolution a => Bool -> Fixed a -> String #

First arg is whether to chop off trailing zeros

data E0 #

Instances

type Uni = Fixed E0 #

resolution of 1, this works the same as Integer

data E1 #

Instances

type Deci = Fixed E1 #

resolution of 10^-1 = .1

data E2 #

Instances

type Centi = Fixed E2 #

resolution of 10^-2 = .01, useful for many monetary currencies

data E3 #

Instances

type Milli = Fixed E3 #

resolution of 10^-3 = .001

data E6 #

Instances

type Micro = Fixed E6 #

resolution of 10^-6 = .000001

data E9 #

Instances

type Nano = Fixed E9 #

resolution of 10^-9 = .000000001

data E12 #

Instances

type Pico = Fixed E12 #

resolution of 10^-12 = .000000000001