diff options
| -rw-r--r-- | control-flow.lisp | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/control-flow.lisp b/control-flow.lisp index 56a1542..75ed06c 100644 --- a/control-flow.lisp +++ b/control-flow.lisp @@ -20,7 +20,8 @@ (export '(identity constantly complement tagbody go block return-from return defconstant prog prog* macrolet flet prog1 prog2 labels - multiple-value-bind multiple-value-list multiple-value-setq)) + multiple-value-bind multiple-value-list multiple-value-setq + multiple-value-prog1 values-list)) (defun identity (x) @@ -226,3 +227,12 @@ `(destructuring-bind ,syms (multiple-value-list ,expression) (setq ,@(mapcan #'list vars syms)) ,(first syms)))) + +(defmacro multiple-value-prog1 (form &body forms) + (let ((varsym (gensym))) + `(let ((,varsym (multiple-value-list ,form))) + ,@forms + (values-list ,varsym)))) + +(defun values-list (list) + (apply #'values list)) |