better error message

lparser.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.c,v 1.4 1998/07/24 18:02:38 roberto Exp roberto $
+** $Id: lparser.c,v 1.5 1998/08/11 13:28:05 roberto Exp roberto $
 ** LL(1) Parser and code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -586,6 +586,12 @@ static void error_expected (LexState *ls, int token) {
   luaX_error(ls, buff);
 }
 
+
+static void error_unexpected (LexState *ls) {
+  luaX_error(ls, "unexpected token");
+}
+
+
 static void error_unmatched (LexState *ls, int what, int who, int where) {
   if (where == ls->linenumber)
     error_expected(ls, what);
@@ -759,7 +765,7 @@ static int stat (LexState *ls) {
       return 0;
 
     default:
-      luaX_error(ls, "<statement> expected");
+      error_unexpected(ls);
       return 0;  /* to avoid warnings */
   }
 }
@@ -1252,7 +1258,7 @@ static void part (LexState *ls, constdesc *cd) {
             code_string(ls, ls->fs->localvar[v.info]);
             break;
           default:
-            luaX_error(ls, "`=' unexpected");
+            error_unexpected(ls);
         }
         next(ls);
         exp1(ls);

ltm.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.c,v 1.16 1998/06/18 16:57:03 roberto Exp roberto $
+** $Id: ltm.c,v 1.17 1998/08/21 17:43:44 roberto Exp roberto $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -148,8 +148,10 @@ void luaT_settagmethod (int t, char *event, TObject *func)
   int e = luaI_checkevent(event, luaT_eventname);
   checktag(t);
   if (!validevent(t, e))
-    luaL_verror("settagmethod: cannot change tag method `%.20s' for tag %d",
-                luaT_eventname[e], t);
+    luaL_verror("cannot change tag method `%.20s' for type `%.20s'%.20s",
+                luaT_eventname[e], luaO_typenames[-t],
+                (t == LUA_T_ARRAY || t == LUA_T_USERDATA) ? " with default tag"
+                                                          : "");
   *func = *luaT_getim(t,e);
   *luaT_getim(t, e) = temp;
 }