Code derived from the document "Report on the Programming Language
        Haskell 2010", is distributed under the following license:
      ,
      The authors intend this Report to belong to the entire Haskell community, and so we grant permission to
         copy and distribute it for any purpose, provided that it is reproduced in its entirety, including this
         Notice. Modified versions of this Report may also be copied and distributed for any purpose, provided
         that the modified version is clearly presented as such, and that it does not claim to be a definition
         of the Haskell 2010 Language.