generic-random: Generic random generators

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Change logNone available
Dependenciesad, base (>=4.8 && <5), containers, hashable, hmatrix, ieee754, MonadRandom, mtl, QuickCheck, transformers, unordered-containers, vector [details]
AuthorLi-yao Xia
CategoryGenerics, Testing
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Source repositoryhead: git clone
UploadedTue May 17 15:43:26 UTC 2016 by lyxia




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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)