===================================================================
RCS file: /home/cvs/OpenXM_contrib2/asir2000/parse/eval.c,v
retrieving revision 1.13
retrieving revision 1.15
diff -u -p -r1.13 -r1.15
--- OpenXM_contrib2/asir2000/parse/eval.c	2001/09/03 07:01:10	1.13
+++ OpenXM_contrib2/asir2000/parse/eval.c	2001/09/20 04:08:21	1.15
@@ -45,7 +45,7 @@
  * DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE,
  * PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE.
  *
- * $OpenXM: OpenXM_contrib2/asir2000/parse/eval.c,v 1.12 2001/09/03 01:04:28 noro Exp $ 
+ * $OpenXM: OpenXM_contrib2/asir2000/parse/eval.c,v 1.14 2001/09/05 09:01:28 noro Exp $ 
 */
 #include <ctype.h>
 #include "ca.h"
@@ -83,6 +83,7 @@ FNODE f;
 	UP2 up2;
 	UP up;
 	UM um;
+	Obj obj;
 	GF2N gf2n;
 	GFPN gfpn;
 	GFSN gfsn;
@@ -105,6 +106,11 @@ FNODE f;
 		case I_PAREN:
 			val = eval((FNODE)(FA0(f)));
 			break;
+		case I_MINUS:
+			a1 = eval((FNODE)(FA0(f)));
+			arf_chsgn((Obj)a1,&obj);
+			val = (pointer)obj;
+			break;
 		case I_BOP:
 			a1 = eval((FNODE)FA1(f)); a2 = eval((FNODE)FA2(f));
 			(*((ARF)FA0(f))->fp)(CO,a1,a2,&val); 
@@ -246,6 +252,8 @@ FNODE f;
 				a = eval((FNODE)FA0(f1)); ind = (NODE)FA1(f1);
 				evalnodebody(ind,&tn);
 				putarray(a,tn,val = eval((FNODE)FA1(f)));
+			} else {
+				error("eval : invalid assignment");
 			}
 			break;
 		case I_ANS: