I'd like to make the following change to Generator_System::adjust_topology_and_space_dimension. In the first `if' statement of adjust_topology_and_space_dimension variable cols_to_be_added is only ever read. The method returns at the end of the `if' statement, so addition and subtraction can be used to calculate the add_zero_columns argument, instead of modifications to the value of cols_to_be_added. Does this sound like a sensible change? Index: src/Generator_System.cc =================================================================== RCS file: /cvs/ppl/ppl/src/Generator_System.cc,v retrieving revision 1.9 diff -u -r1.9 Generator_System.cc --- src/Generator_System.cc 21 Sep 2005 10:56:43 -0000 1.9 +++ src/Generator_System.cc 21 Sep 2005 10:57:53 -0000 @@ -48,12 +48,11 @@ if (num_rows() == 0) { if (num_columns() == 0) if (new_topology == NECESSARILY_CLOSED) { - add_zero_columns(++cols_to_be_added); + add_zero_columns(cols_to_be_added + 1); set_necessarily_closed(); } else { - cols_to_be_added += 2; - add_zero_columns(cols_to_be_added); + add_zero_columns(cols_to_be_added + 2); set_not_necessarily_closed(); } else @@ -68,21 +67,20 @@ // Nothing to do. break; default: - add_zero_columns(--cols_to_be_added); + add_zero_columns(cols_to_be_added - 1); } set_necessarily_closed(); } else { // Here old_topology == NECESSARILY_CLOSED // and new_topology == NOT_NECESSARILY_CLOSED. - add_zero_columns(++cols_to_be_added); + add_zero_columns(cols_to_be_added + 1); set_not_necessarily_closed(); } - else { + else // Here topologies agree. if (cols_to_be_added > 0) add_zero_columns(cols_to_be_added); - } assert(OK()); return true; }