-open F, "$base.scad" or die "$base.scad $!";
-while (<F>) {
- next unless m#^\s*module\s+(\w+)\b.*////toplevel\b#;
+
+sub read_file ($);
+sub read_file ($) {
+ my ($fn) = @_;
+ my $f = new IO::File "$fn", '<' or die "$fn $!";
+ while (<$f>) {
+ if (m#^//// toplevels-from:#) {
+ defined($_ = <$f>) or die $!;
+ m#^include\s+\<(\S+)>\s*$# or die;
+ read_file($1);
+ next;
+ }
+ next unless m#^\s*(?:////\s?)?module\s+(\w+)\b.*////toplevel\b#;