pcg-random

Haskell bindings to the PCG random number generator.

LTS Haskell 24.28:	0.1.4.0@rev:1
Stackage Nightly 2026-01-18:	0.1.4.0@rev:1
Latest on Hackage:	0.1.4.0@rev:1

See all snapshots pcg-random appears in

BSD-3-Clause licensed by Christopher Chalmers

Maintained by [email protected]

This version can be pinned in stack with:pcg-random-0.1.4.0@sha256:e7ec3da868ef451104c53369849116af64a40936ce8bc75857b83232360510b9,2666

Module documentation for 0.1.4.0

System
- System.Random
  - System.Random.PCG
    - System.Random.PCG.Class
    - System.Random.PCG.Fast
      - System.Random.PCG.Fast.Pure
    - System.Random.PCG.Pure
    - System.Random.PCG.Single
    - System.Random.PCG.Unique

Depends on 5 packages(full list with versions):

entropy, primitive, random

Used by 1 package in nightly-2026-01-18(full list with versions):

random-bytestring

pcg-random

Haskell bindings to the PCG random number generator http://www.pcg-random.org.

PCG is a family of simple fast space-efficient statistically good algorithms for random number generation. Unlike many general-purpose RNGs, they are also hard to predict.

Implements the standard multiple stream generator as well as the fast, single and unique variants.

The api is very similar to mwc-random but the pcg generator appears to be slightly faster. There is also a pure interface via the random libray.

Changes

0.1.3.5

Build with ghc-8.4

0.1.3.4

Fix byte array bugs in System.Random.PCG.Pure

0.1.3.3

Added System.Random.PCG.Pure module.

0.1.3.2

Added System.Random.PCG.Fast.Pure module.

0.1.3.1

Added withFrozen function.

0.1.3.0

Use entropy package for system random generator.

0.1.2.0

Allow primitive-0.6.

0.1.1.0

Add uniformB, a function to generate a bounded random number in [0,b) range. This preforms significantly faster than uniformR (0,b-1).
Add type specific versions for uniformR and uniformB.

0.1.0.1

Fix bug when dealing with Word and Int types.