message: Pierre's comments
diff: @@ -55,10 +55,8 @@ void import_arg_groups()
  {
  CmdLine::import_arg_group( "in" );
  CmdLine::import_arg_group( "out" );
  - CmdLine::import_arg_group( "global" );
  }
  -
  void show_usage_example()
  {
  Logger::div( "Example" );
  @@ -66,6 +64,7 @@ void show_usage_example()
  "ringmesh-tetrahedralize in:geomodel=path/to/input/geomodel.ext ",
  "out:geomodel=path/to/output/geomodel.ext algo:tet=TetGen" );
  }
  +
  int main( int argc, char** argv )
  {
  try
  @@ -73,9 +72,16 @@ int main( int argc, char** argv )
  default_configure();
  import_arg_groups();
  + if( argc == 1 )
  + {
  + GEO::CmdLine::show_usage();
  + return 0;
  + }
  +
  std::vector< std::string > filenames;
  if( !GEO::CmdLine::parse( argc, argv, filenames ) )
  {
  + GEO::CmdLine::show_usage();
  show_usage_example();
  return 1;
  }
  