X-Git-Url: http://git.kpe.io/?p=kmrcl.git;a=blobdiff_plain;f=macros.lisp;h=c83b3b64a19f9f9be26f9dd96daa9ed9213f6f6d;hp=9b6150a470dc9597470fe8ad2ba8e303e9c3e853;hb=5f3fba52fd7c9984a7f797c4720ec93799d6d786;hpb=526eef1b59e071cbb4ecd35f73a14c1a3f8e32b6

diff --git a/macros.lisp b/macros.lisp
index 9b6150a..c83b3b6 100644
--- a/macros.lisp
+++ b/macros.lisp
@@ -147,6 +147,15 @@
      ,@body))
 
 
+(defmacro time-seconds (&body body)
+  (let ((t1 (gensym)))
+    `(let ((,t1 (get-internal-real-time)))
+       (values
+	(progn ,@body)
+	(coerce (/ (- (get-internal-real-time) ,t1)
+		   internal-time-units-per-second)
+		'double-float)))))
+  
 (defmacro time-iterations (n &body body)
   (let ((i (gensym))
 	(count (gensym)))
@@ -239,3 +248,24 @@
      ,@(mapcar
 	(lambda (x) (list 'ignore-errors x))
 	forms)))
+
+(defmacro ppmx (form)
+  "Pretty prints the macro expansion of FORM."
+  `(let* ((exp1 (macroexpand-1 ',form))
+	  (exp (macroexpand exp1))
+	  (*print-circle* nil))
+     (cond ((equal exp exp1)
+	    (format t "~&Macro expansion:")
+	    (pprint exp))
+	   (t (format t "~&First step of expansion:")
+	      (pprint exp1)
+	      (format t "~%~%Final expansion:")
+	      (pprint exp)))
+     (format t "~%~%")
+     (values)))
+
+(defmacro defconst (symbol value &optional doc)
+   `(defconstant ,symbol (if (boundp ',symbol)
+                             (symbol-value ',symbol)
+                             ,value)
+     ,@(when doc (list doc))))