text.mod/graphviz.mod/graphviz/cmd/gvpr/lib/get-layers-list

BEG_G {
  char* larr[int];
  int i;
  if (!isAttr($,"G","layers")) return;
  if (isAttr($,"G","layersep"))
    tokens($.layers,larr,$.layersep);
  else
    tokens($.layers,larr," :\t");
  for (larr[i]) {
    if (i>0) printf(" %s",larr[i]);
    else printf("%s",larr[i]);
  }
}