}
my $copy_attr_func = $copy_attr{$attr_type};
if (!defined($copy_attr_func)) {
- $copy_attr_func = $default_copy_attr;
+ if ($attr_type eq "") {
+ $copy_attr_func = "NULL";
+ } else {
+ $copy_attr_func = $default_copy_attr;
+ }
}
if (defined($copy_attr_func)) {
push(@obst_new_irop, "\tops.copy_attr = ${copy_attr_func};\n");