// See www.openfst.org for extensive documentation on this weighted
  // finite-state transducer library.
  //
  // Prints some basic information about the FSTs in an FST archive.
  
  #include <string>
  #include <vector>
  
  #include <fst/flags.h>
  #include <fst/extensions/far/farscript.h>
  #include <fst/extensions/far/getters.h>
  
  DEFINE_string(begin_key, "",
                "First key to extract (default: first key in archive)");
  DEFINE_string(end_key, "",
                "Last key to extract (default: last key in archive)");
  
  DEFINE_bool(list_fsts, false, "Display FST information for each key");
  
  int main(int argc, char **argv) {
    namespace s = fst::script;
  
    string usage = "Prints some basic information about the FSTs in an FST ";
    usage += "archive.
  
    Usage:";
    usage += argv[0];
    usage += " [in1.far in2.far...]
  ";
    usage += "  Flags: begin_key end_key list_fsts";
  
    std::set_new_handler(FailedNewHandler);
    SET_FLAGS(usage.c_str(), &argc, &argv, true);
    s::ExpandArgs(argc, argv, &argc, &argv);
  
    std::vector<string> in_fnames;
    for (int i = 1; i < argc; ++i) in_fnames.push_back(argv[i]);
    if (in_fnames.empty()) in_fnames.push_back("");
  
    const auto arc_type = s::LoadArcTypeFromFar(in_fnames[0]);
    if (arc_type.empty()) return 1;
  
    s::FarInfo(in_fnames, arc_type, FLAGS_begin_key, FLAGS_end_key,
               FLAGS_list_fsts);
  
    return 0;
  }