The ghc-vis User Guideghc-vis is a tool to visualize live Haskell data structures in GHCi. Evaluation is not forced and you can interact with the visualized data structures. This allows seeing Haskell’s lazy evaluation and sharing in action. Functional programming languages like Haskell offer a way to write well-structured software, which is easy to understand and still performs well. In order to achieve this one has t
