Install libghc-haskell-lexer-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-haskell-lexer-doc
Description:
Documentation for a fully compliant Haskell 98 lexer; documentation
A fully compliant Haskell 98 lexer written in Haskell. The lexer produces a list tuples containing a token type identifier, its position and the token string. . 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://hackage.haskell.org/package/haskell-lexer
Version: 1.0.1-3build1
Section: universe/doc