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1. data SystemID

   unix-compat	System.PosixCompat.Unistd

   No documentation available.

2. SystemID :: String -> String -> String -> String -> String -> SystemID

   unix-compat	System.PosixCompat.Unistd

   No documentation available.

3. getSystemID :: IO SystemID

   unix-compat	System.PosixCompat.Unistd

   No documentation available.

4. package void

   A Haskell 98 logically uninhabited data type A Haskell 98 logically uninhabited data type, used to indicate that a given term should not exist.

5. void :: Functor f => f a -> f ()

   pipes	Pipes

   void value discards or ignores the result of evaluation, such as the return value of an IO action.

   Examples

   Replace the contents of a Maybe Int with unit:

   >>> void Nothing
   Nothing
   

   >>> void (Just 3)
   Just ()
   

   Replace the contents of an Either Int Int with unit, resulting in an Either Int ():

   >>> void (Left 8675309)
   Left 8675309
   

   >>> void (Right 8675309)
   Right ()
   

   Replace every element of a list with unit:

   >>> void [1,2,3]
   [(),(),()]
   

   Replace the second element of a pair with unit:

   >>> void (1,2)
   (1,())
   

   Discard the result of an IO action:

   >>> mapM print [1,2]
   1
   2
   [(),()]
   

   >>> void $ mapM print [1,2]
   1
   2
   

6. groupHidden :: Group a -> [a]

   cmdargs	System.Console.CmdArgs.Explicit

   Items that are hidden (not displayed in the help message).

7. package genvalidity-hspec

   Standard spec's for GenValidity instances Note: There are companion packages for this library:

   • genvalidity-hspec-aeson
   • genvalidity-hspec-binary
   • genvalidity-hspec-cereal
   • genvalidity-hspec-hashable

8. module Test.Validity

   To use the Spec functions in this module, you will need TypeApplications. The most interesting functions in this module for most uses are:

   • genValidSpec
   • eqSpec
   • ordSpec
   • producesValidsOnValids
   • forAllValid
   • shouldBeValid

9. arbitraryGeneratesOnlyValid :: (Show a, Validity a, Arbitrary a) => Property

   genvalidity-hspec	Test.Validity

   arbitrary only generates valid data

   arbitraryGeneratesOnlyValid @Int
   

10. forAllValid :: (Show a, GenValid a, Testable prop) => (a -> prop) -> Property

    genvalidity-hspec	Test.Validity

    No documentation available.

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