ieee-0.6: Approximate comparisons for IEEE floating point numbers Source code Contents Index

Data.AEq Stability experimental Maintainer Patrick Perry <patperry@stanford.edu>

Description

A type class for approximate and exact equalilty comparisons and instances for common data types.

Documentation

class Eq a => AEq a where Source

Methods (===) :: a -> a -> Bool Source A reliable way to test if two values are exactly equal. For floating point values, this will consider NaN to be (===) to NaN. (~==) :: a -> a -> Bool Source An approximate equality comparison operator. For RealFloat values, (~==) x y = (x == y) || (abs (x - y) < epsilon) || (eqRel delta x y) || (isNaN x && isNaN y). For Complex numbers, the if the real and imaginary parts are not approximately equal, the polar forms are compared, instead. Instances AEq Bool AEq Char AEq Double AEq Float AEq Int AEq Int8 AEq Int16 AEq Int32 AEq Int64 AEq Integer AEq Ordering AEq Word AEq Word8 AEq Word16 AEq Word32 AEq Word64 AEq () AEq CChar AEq CSChar AEq CUChar AEq CShort AEq CUShort AEq CInt AEq CUInt AEq CLong AEq CULong AEq CLLong AEq CULLong AEq CFloat AEq CDouble AEq CLDouble AEq CPtrdiff AEq CSize AEq CWchar AEq CSigAtomic AEq CClock AEq CTime AEq CIntPtr AEq CUIntPtr AEq CIntMax AEq CUIntMax AEq a => AEq ([] a) RealFloat a => AEq (Complex a) AEq a => AEq (Maybe a) (AEq a, AEq b) => AEq (Either a b) (AEq a, AEq b) => AEq ((,) a b) (AEq a, AEq b, AEq c) => AEq ((,,) a b c) (AEq a, AEq b, AEq c, AEq d) => AEq ((,,,) a b c d) (AEq a, AEq b, AEq c, AEq d, AEq e) => AEq ((,,,,) a b c d e)

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