method class_expr : class_expr -> 'self_type =
                  function
                  | CeNil _x -> let o = o#loc _x in o
                  | CeApp (_x, _x_i1, _x_i2) ->
                      let o = o#loc _x in
                      let o = o#class_expr _x_i1 in let o = o#expr _x_i2 in o
                  | CeCon (_x, _x_i1, _x_i2, _x_i3) ->
                      let o = o#loc _x in
                      let o = o#virtual_flag _x_i1 in
                      let o = o#ident _x_i2 in let o = o#ctyp _x_i3 in o
                  | CeFun (_x, _x_i1, _x_i2) ->
                      let o = o#loc _x in
                      let o = o#patt _x_i1 in let o = o#class_expr _x_i2 in o
                  | CeLet (_x, _x_i1, _x_i2, _x_i3) ->
                      let o = o#loc _x in
                      let o = o#rec_flag _x_i1 in
                      let o = o#binding _x_i2 in
                      let o = o#class_expr _x_i3 in o
                  | CeStr (_x, _x_i1, _x_i2) ->
                      let o = o#loc _x in
                      let o = o#patt _x_i1 in
                      let o = o#class_str_item _x_i2 in o
                  | CeTyc (_x, _x_i1, _x_i2) ->
                      let o = o#loc _x in
                      let o = o#class_expr _x_i1 in
                      let o = o#class_type _x_i2 in o
                  | CeAnd (_x, _x_i1, _x_i2) ->
                      let o = o#loc _x in
                      let o = o#class_expr _x_i1 in
                      let o = o#class_expr _x_i2 in o
                  | CeEq (_x, _x_i1, _x_i2) ->
                      let o = o#loc _x in
                      let o = o#class_expr _x_i1 in
                      let o = o#class_expr _x_i2 in o
                  | CeAnt (_x, _x_i1) ->
                      let o = o#loc _x in let o = o#string _x_i1 in o