new experimental syntax using reserved word 'undef'

lbaselib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lbaselib.c,v 1.321 2018/02/27 17:48:28 roberto Exp roberto $
+** $Id: lbaselib.c,v 1.322 2018/02/27 18:47:32 roberto Exp roberto $
 ** Basic library
 ** See Copyright Notice in lua.h
 */
@@ -170,22 +170,6 @@ static int luaB_rawset (lua_State *L) {
 }
 
 
-static int luaB_keyin (lua_State *L) {
-  luaL_checkany(L, 2);  /* ensures a first argument too */
-  lua_settop(L, 2);
-  lua_pushboolean(L, lua_keyin(L, 1));
-  return 1;
-}
-
-
-static int luaB_removekey (lua_State *L) {
-  luaL_checkany(L, 2);  /* ensures a first argument too */
-  lua_settop(L, 2);
-  lua_removekey(L, 1);
-  return 0;
-}
-
-
 static int pushmode (lua_State *L, int oldmode) {
   lua_pushstring(L, (oldmode == LUA_GCINC) ? "incremental" : "generational");
   return 1;
@@ -503,8 +487,6 @@ static const luaL_Reg base_funcs[] = {
   {"rawlen", luaB_rawlen},
   {"rawget", luaB_rawget},
   {"rawset", luaB_rawset},
-  {"keyin", luaB_keyin},
-  {"removekey", luaB_removekey},
   {"select", luaB_select},
   {"setmetatable", luaB_setmetatable},
   {"tonumber", luaB_tonumber},