insert_string
insert_string(&ignored_structs, alloc_string(struct_type));
int insert_string(struct string_list **str_list, const char *str);
insert_string(&links, link);
insert_string(&links, new);
if (!insert_string(&saved_constraints, con))
insert_string(&ptr_names, alloc_string(argv[0]));
if (!insert_string(&ptr_names_done, ptr))
insert_string(&links, new);
insert_string(totally_filtered, (char *)sm->name);
insert_string(totally_filtered, (char *)sm->name);
insert_string(&set_list, (char *)sm->name);
insert_string(&set_list, (char *)sm->name);
insert_string(&set_list, (char *)sm->name);
insert_string(&set_list, (char *)sm->name);
insert_string(&set_list, (char *)sm->name);
insert_string(&ret, tmp);