val save_as_json : bool -> out_channel -> CST.program -> unitsave_as_json simplified oc cst writes the concrete syntax tree cst to the out_channel oc. If simplified is true then location information is omitted, otherwise it is included in the json output.
val load_from_json : in_channel -> CST.programload_from_json ic retrieves a concrete syntax tree cst from the in_channel ic, assuming it has been generated using save_as_json false.
val save_as_dot : out_channel -> CST.program -> unitsave_as_dot oc cst writes the concrete syntax tree cst to the out_channel oc using the DOT format.