diff options
Diffstat (limited to 'share')
| -rw-r--r-- | share/txr/stdlib/struct.tl | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/share/txr/stdlib/struct.tl b/share/txr/stdlib/struct.tl index 45d8b4e9..c8eadc8b 100644 --- a/share/txr/stdlib/struct.tl +++ b/share/txr/stdlib/struct.tl @@ -149,6 +149,9 @@ (obj (throwf 'eval-error "~s: bad syntax: ~s" 'qref refs)))) (defmacro new (spec . pairs) + (if (oddp (length pairs)) + (throwf 'eval-error "~s: slot initform arguments must occur pairwise" + 'new)) (let ((qpairs (mappend (aret ^(',@1 ,@2)) (tuples 2 pairs)))) (tree-case spec ((atom . args) ^(make-struct ',atom (list ,*qpairs) ,*args)) |