ghc - 8.4.4+dfsg1-3 main

The Glorious Glasgow Haskell Compilation system (GHC) is a compiler for
Haskell.
.
Haskell is "the" standard lazy functional programming language. The language
definition and additional documentation can be found in the `haskell-doc'
package. Alternatively, there is an online version at
http://haskell.org/onlinereport/.