diff options
| -rw-r--r-- | src/propspec.lisp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/propspec.lisp b/src/propspec.lisp index 39b9d48..00e76f2 100644 --- a/src/propspec.lisp +++ b/src/propspec.lisp @@ -231,8 +231,11 @@ systems." ((first unpreprocessed-propspec) (second unpreprocessed-propspec)) (make-propspec :systems (union (propspec-systems first) (propspec-systems second)) - :propspec `(silent-seqprops ,(propspec-props first) - ,(propspec-props second)))) + :propspec (let ((firstp (propspec-props first)) + (secondp (propspec-props second))) + (if (and firstp secondp) + `(silent-seqprops ,firstp ,secondp) + (or firstp secondp))))) (defmethod eval-propspec ((propspec preprocessed-propspec)) (eval (slot-value propspec 'preprocessed-propspec-expression))) |