X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/lisp/blobdiff_plain/28a5e53109f67f9ed97af095baa95fd360ed9e68..8f801ae819d1f622601c9786a0fce27102b49378:/mdw-base.lisp

diff --git a/mdw-base.lisp b/mdw-base.lisp
index 2c463e9..23bb4ef 100644
--- a/mdw-base.lisp
+++ b/mdw-base.lisp
@@ -31,7 +31,8 @@ (defpackage #:mdw.base
   (:export #:unsigned-fixnum
 	   #:compile-time-defun
 	   #:show
-	   #:stringify #:mappend #:listify #:fix-pair #:pairify #:parse-body
+	   #:stringify #:mappend #:listify #:fix-pair #:pairify
+	   #:parse-body #:with-parsed-body
 	   #:whitespace-char-p
 	   #:slot-uninitialized
 	   #:nlet #:while #:until #:case2 #:ecase2 #:setf-default
@@ -149,6 +150,17 @@ (compile-time-defun parse-body (body &key (allow-docstring-p t))
 				 (and decls (list (cons 'declare decls)))
 				 forms))))))))
 
+(defmacro with-parsed-body
+    ((bodyvar declvar &optional (docvar (gensym) docp)) form &body body)
+  "Parse FORM into a body, declarations and (maybe) a docstring; bind BODYVAR
+   to the body, DECLVAR to the declarations, and DOCVAR to (a list
+   containing) the docstring, and evaluate BODY."
+  `(multiple-value-bind
+       (,docvar ,declvar ,bodyvar)
+       (parse-body ,form :allow-docstring-p ,docp)
+     ,@(if docp nil `((declare (ignore ,docvar))))
+     ,@body))
+
 #-cmu
 (progn
   (declaim (inline fixnump))