@hackage pointless-lenses0.0.5

Pointless Lenses library

  • Installation

  • Dependencies (0)

  • Dependents (0)

Pointless Lenses

This cabal package can be installed with:

$ cabal install pointless-lenses

For a manual install, execute:

$ runhaskell Setup.lhs configure $ runhaskell Setup.lhs build $ runhaskell Setup.lhs install

You can now start playing with the example code that comes with the library, under Language.Pointless.Examples.Examples. The easiest way is to create a new module that imports some library modules

module Test where

import Test.QuickCheck.Test import Generics.Pointless.Lenses import Generics.Pointless.Lenses.Examples.Examples

and interpret it

$ ghci Test.hs

We can now test the well-behavedness of some lens, for example:

quickCheck (wb filter_lns) +++ OK, passed 100 tests.

Or run some example and later check what it is actually doing:

exampleT Fst (1,'a')