gistfile1.erl

% Input:
 [{module,1,
          {constant,1,'Foo'},
          [{function,2,
                     {identifier,2,bar},
                     [{identifier,2,n}],
                     [{match,3,
                             {identifier,3,n},
                             {op,{'*',3},{identifier,3,n},{integer,3,2}}},
                      {match,4,
                             {identifier,4,n},
                             {op,{'+',4},{identifier,4,n},{integer,4,1}}},
                      {identifier,5,n}]}]}]
% Output:
 [{module,1,
          {constant,1,'Foo'},
          [{function,2,
                     {identifier,2,bar},
                     [{identifier,2,n_0}],
                     [{match,3,
                             {identifier,3,n_1},
                             {op,{'*',3},{identifier,3,n_0},{integer,3,2}}},
                      {match,4,
                             {identifier,4,n_2},
                             {op,{'+',4},{identifier,4,n_1},{integer,4,1}}},
                      {identifier,5,n_2}]}]}]