Modulemersenne-random-pure64-0.2.2.0Haskell98

System.Random.Mersenne.Pure64

A purely functional binding 64 bit binding to the classic mersenne twister random number generator. This is more flexible than the impure 'mersenne-random' library, at the cost of being a bit slower. This generator is however, many times faster than System.Random, and yields high quality randoms with a long period.

This generator may be used with System.Random, however, that is likely to be slower than using it directly.

1 type
7 values

Packagemersenne-random-pure64-0.2.2.0
Exports8
LanguageHaskell98
LicenceBSD-3-Clause
SourcePure64.hs

The random number generator

1 declaration

datadata PureMT

PureMT, a pure mersenne twister pseudo-random number generator

Instances2Show, RandomGen

Show PureMTDefined in mersenne-random-pure64-0.2.2.0 · System.Random.Mersenne.Pure64.Internal
RandomGen PureMTDefined in mersenne-random-pure64-0.2.2.0 · System.Random.Mersenne.Pure64 · orphan

Introduction

2 declarations

valuepureMT :: Word64 -> PureMT

Create a PureMT generator from a Word64 seed.

valuenewPureMT :: IO PureMT

Create a new PureMT generator, using the clocktime as the base for the seed.

Being purely functional, the PureMT generator is an instance of RandomGen. However, it doesn't support split yet.

Low level access to the generator

5 declarations

valuerandomInt :: PureMT -> (Int, PureMT)

Yield a new Int value from the generator, returning a new generator and that Int. The full 64 bits will be used on a 64 bit machine.

valuerandomWord :: PureMT -> (Word, PureMT)

Yield a new Word value from the generator, returning a new generator and that Word.

valuerandomInt64 :: PureMT -> (Int64, PureMT)

Yield a new Int64 value from the generator, returning a new generator and that Int64.

valuerandomWord64 :: PureMT -> (Word64, PureMT)

Yield a new Word64 value from the generator, returning a new generator and that Word64.

valuerandomDouble :: PureMT -> (Double, PureMT)

Efficiently yield a new 53-bit precise Double value, and a new generator.

Orphan instances

1 instance

RandomGen PureMT