OP_OPTIONAL
(OP_JOIN | OP_USE | OP_USEBEFORE | OP_EXEC | OP_OPTIONAL |
if (gn->type & OP_OPTIONAL) {
ADD(OP_OPTIONAL);
if (gn->mtime == 0 && !(gn->type & OP_OPTIONAL)) {
{ ".OPTIONAL", SP_ATTRIBUTE, OP_OPTIONAL },
if (sgn->type & OP_OPTIONAL && Lst_IsEmpty(&tgn->commands)) {
{ OP_OPTIONAL, false, "OPTIONAL" },