--- a/src/lua_objs.c	Sun Apr 19 04:04:42 2009 +0300
+++ b/src/lua_objs.c	Sun Apr 19 04:35:29 2009 +0300
@@ -66,6 +66,39 @@
     }
 }
 
+const char *lua_arg_string (lua_State *L, int index, const char *name, const char *def)
+{
+    const char *value;
+ 
+    // use default?
+    if (lua_isnoneornil(L, index) && def != (const char *) LUA_ARG_REQUIRED)
+        return def;
+    
+    // value given?
+    if ((value = lua_tostring(L, index)))
+        return value;
+   
+    // error
+    luaL_error(L, "missing value for required string argument <%d:%s>", index, name);
+}
+
+bool lua_arg_bool (lua_State *L, int index, const char *name, int def)
+{
+    bool value;
+ 
+    // use default?
+    if (lua_isnoneornil(L, index) && def != LUA_ARG_REQUIRED)
+        return def;
+   
+    // value given?
+    value = lua_toboolean(L, index);
+
+    return value;
+    
+    // error
+    // luaL_error(L, "missing value of required boolean argument <%d:%s>", index, name);
+}
+
 /**
  * Wrapper for module
  */