generic-random: Generic random generators

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Versions 0.1.0.0, 0.1.0.0, 0.1.1.0, 0.2.0.0, 0.3.0.0, 0.4.0.0, 0.4.1.0, 0.5.0.0, 1.0.0.0, 1.1.0.0, 1.1.0.1, 1.1.0.2, 1.2.0.0, 1.3.0.0, 1.3.0.1, 1.4.0.0
Change log None available
Dependencies ad, base (>=4.8 && <5), containers, hashable, hmatrix, ieee754, MonadRandom, mtl, QuickCheck, transformers, unordered-containers, vector [details]
License MIT
Author Li-yao Xia
Maintainer lysxia@gmail.com
Category Generics, Testing
Home page http://github.com/lysxia/generic-random
Source repo head: git clone https://github.com/githubuser/generic-random
Uploaded by lyxia at 2016-05-17T15:43:26Z

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Readme for generic-random-0.1.0.0

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Generic random generators

Define sized random generators for almost any type.

    {-# LANGUAGE DeriveDataTypeable #-}
    import Data.Data
    import Test.QuickCheck
    import Data.Random.Generics

    data Term = Lambda Int Term | App Term Term | Var Int
      deriving (Show, Data)

    instance Arbitrary Term where
      arbitrary = sized $ generatorPWith [positiveInts]

    positiveInts :: Alias Gen
    positiveInts =
      alias $ \() -> fmap getPositive arbitrary :: Gen Int

    main = sample (arbitrary :: Gen Term)

References