Introduce an Objective-C class for wrapping Lisp values.

darcs-hash:47920ab6598799fca44c964c3fa6a3dfb20389c9

1 files changed, 37 insertions, 0 deletions

diff --git a/Lisp/lisp-value-wrapping.lisp b/Lisp/lisp-value-wrapping.lisp
new file mode 100644
index 0000000..cf8e63c
--- /dev/null
+++ b/Lisp/lisp-value-wrapping.lisp
@@ -0,0 +1,37 @@
+;;;; Objective-CL, an Objective-C bridge for Common Lisp.
+;;;; Copyright (C) 2007, 2008  Matthias Andreas Benkard.
+;;;;
+;;;; This program is free software: you can redistribute it and/or
+;;;; modify it under the terms of the GNU Lesser General Public License
+;;;; as published by the Free Software Foundation, either version 3 of
+;;;; the License, or (at your option) any later version.
+;;;;
+;;;; This program is distributed in the hope that it will be useful, but
+;;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;;; Lesser General Public License for more details.
+;;;;
+;;;; You should have received a copy of the GNU Lesser General Public
+;;;; License along with this program.  If not, see
+;;;; <http://www.gnu.org/licenses/>.
+
+(in-package #:mulk.objective-cl)
+
+
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (find-objc-class "NSObject" t))
+
+
+(defclass ns::mlk-lisp-value (ns::ns-object)
+     ((lisp-value :initarg :value
+                  :initform nil
+                  :accessor lisp-value))
+  (:metaclass ns::+ns-object))
+
+
+(defun make-lisp-value (value)
+  ;; FIXME: The following won't work.  Make MAKE-INSTANCE more useful...
+  ;(make-instance 'ns::mlk-lisp-value :value value)
+  (let ((instance (invoke (find-class 'ns::mlk-lisp-value) 'new)))
+    (setf (lisp-value instance) value)
+    instance))