Major effort to plug slot-name leaks.

[sod] / src / utilities.lisp

diff --git a/src/utilities.lisp b/src/utilities.lisp
index be5ce56..099c4ba 100644 (file)
--- a/src/utilities.lisp
+++ b/src/utilities.lisp
@@ -694,6 +694,26 @@
                      ,(loopguts indexvar t nil))))))))))
 
 ;;;--------------------------------------------------------------------------
+;;; Structure accessor hacks.
+
+(export 'define-access-wrapper)
+(defmacro define-access-wrapper (from to &key read-only)
+  "Make (FROM THING) work like (TO THING).
+
+   If not READ-ONLY, then also make (setf (FROM THING) VALUE) work like
+   (setf (TO THING) VALUE).
+
+   This is mostly useful for structure slot accessors where the slot has to
+   be given an unpleasant name to avoid it being an external symbol."
+  `(progn
+     (declaim (inline ,from ,@(and (not read-only) `((setf ,from)))))
+     (defun ,from (object)
+       (,to object))
+     ,@(and (not read-only)
+           `((defun (setf ,from) (value object)
+               (setf (,to object) value))))))
+
+;;;--------------------------------------------------------------------------
 ;;; CLOS hacking.
 
 (export 'default-slot)