static public int IsNull(IntPtr L)
{
try
{
ObjectTranslator translator = ObjectTranslatorPool.Instance.Find(L);
LuaTypes t = LuaAPI.lua_type(L, 1);
if (t == LuaTypes.LUA_TNIL)
{
LuaAPI.lua_pushboolean(L, true);
}
// LUA_TUSERDATA or LUA_TTABLE(Class inherited from Unity Native)
else if (t == LuaTypes.LUA_TUSERDATA)
{
object o = translator.SafeGetCSObj(L, 1);
var is_valid = o != null && LuaEnv.ObjectValidCheck(o);
LuaAPI.lua_pushboolean(L, !is_valid);
}
else
{
LuaAPI.lua_pushboolean(L, false);
}
return(1);
}
catch (Exception e)
{
return(LuaAPI.luaL_error(L, "IsNull" + e));
}
}