Safe Haskell	Trustworthy
Language	Haskell2010

Test.QuickCheck.Safe.Trusted

Synopsis

pureEvaluate :: a -> Either AnException a
type AnException = SomeException
inventQCGen :: a -> QCGen
data QCGen

Documentation

pureEvaluate :: a -> Either AnException a Source #

pureEvaluate wraps tryEvaluate in unsafePerformIO. This may look like a dirty hack, but this building block allows us to implement most of QuickCheck's functionality without resorting to IO again.

type AnException = SomeException Source #

inventQCGen :: a -> QCGen Source #

inventQCGen invokes newQCGen via unsafePerformIO. It is useful in connection with the quickCheck family of functions.

data QCGen Source #

The "standard" QuickCheck random number generator. A wrapper around either SMGen on GHC, or StdGen on other Haskell systems.

Instances

Instances details

Arbitrary QCGen
Instance details Defined in Test.QuickCheck.Arbitrary Methods arbitrary :: Gen QCGen Source # shrink :: QCGen -> [QCGen] Source #
Splittable QCGen
Instance details Defined in Test.QuickCheck.Random Methods left :: QCGen -> QCGen right :: QCGen -> QCGen
Read QCGen
Instance details Defined in Test.QuickCheck.Random Methods readsPrec :: Int -> ReadS QCGen Source # readList :: ReadS [QCGen] Source # readPrec :: ReadPrec QCGen Source # readListPrec :: ReadPrec [QCGen] Source #
Show QCGen
Instance details Defined in Test.QuickCheck.Random Methods showsPrec :: Int -> QCGen -> ShowS Source # show :: QCGen -> String Source # showList :: [QCGen] -> ShowS Source #
RandomGen QCGen
Instance details Defined in Test.QuickCheck.Random Methods next :: QCGen -> (Int, QCGen) genWord8 :: QCGen -> (Word8, QCGen) genWord16 :: QCGen -> (Word16, QCGen) genWord32 :: QCGen -> (Word32, QCGen) genWord64 :: QCGen -> (Word64, QCGen) genWord32R :: Word32 -> QCGen -> (Word32, QCGen) genWord64R :: Word64 -> QCGen -> (Word64, QCGen) genShortByteString :: Int -> QCGen -> (ShortByteString, QCGen) genRange :: QCGen -> (Int, Int) split :: QCGen -> (QCGen, QCGen)