Install libghc-tree-monad-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-tree-monad-doc
Description:
Non-Determinism Monad for Tree Search; documentation
This Haskell library provides an implementation of the MonadPlus type class that represents the search space as a tree whose constructors represent mzero, return, and mplus. . This package provides the documentation for a library for the Haskell programming language. See http://www.haskell.org/ for more information on Haskell.
Homepage: http://sebfisch.github.com/tree-monad
Version: 0.3-1
Section: universe/doc