let

   fold (fn target => add_literal_char target) ["SML", "OCaml", "Haskell"] 

   val charr = @{const_name Char}

   #> add_literal_list_string "Haskell"

   val nibbles = [@{const_name Nibble0}, @{const_name Nibble1},

     @{const_name Nibble2}, @{const_name Nibble3},

     @{const_name Nibble4}, @{const_name Nibble5},

     @{const_name Nibble6}, @{const_name Nibble7},

     @{const_name Nibble8}, @{const_name Nibble9},

     @{const_name NibbleA}, @{const_name NibbleB},

     @{const_name NibbleC}, @{const_name NibbleD},

     @{const_name NibbleE}, @{const_name NibbleF}];

 in

   fold (fn target => Code_Target.add_literal_char target charr nibbles)

     ["SML", "OCaml", "Haskell"]

   #> Code_Target.add_literal_list_string "Haskell"

     @{const_name Nil} @{const_name Cons} charr nibbles

 end