如何防止在 Luabind 类中创建新属性？
我正在使用 Luabind 将 C++ 类绑定到 Lua。从 Lua 脚本中，我可以将任意属性（键/值对）添加到代表我的类的表中，即使我从未告诉 Luabind 这些属性存在：
cheese = Cheese()
cheese.type = "gouda"
cheese.age = 2
cheese.hippopotamus = "monkey" -- Oops! This member was not defined!
河马行虽然无意义，但将执行而不会导致 Lua 错误。
我如何防止这些新属性？我知道当只使用 Lua C API 时，可以使用 __newindex 元方法来完成，但是有没有办法用 Luabind 来做到这一点？
I'm using Luabind to bind C++ classes to Lua. From the Lua script, I can add arbitrary properties (key/value pairs) to the tables that represent my classes, even if I never told Luabind these properties exist:
cheese = Cheese()
cheese.type = "gouda"
cheese.age = 2
cheese.hippopotamus = "monkey" -- Oops! This member was not defined!
The hippopotamus line, though nonsensical, will execute without causing a Lua error.
How do I prevent these new properties? I know that when using just the Lua C API this can be accomplished using the __newindex metamethod, but is there a way to do this with Luabind?
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我不是根据经验说话，但这里有一些来自 luabind 用户邮件列表的电子邮件线程：首先， 一个人的独白尝试做你想做的事情。其次，来自 luabind 维护者的有点旧的（2009 年 11 月）电子邮件，指出 提供自定义 __newindex 元方法是目前不可能，但计划用于 1.0（当前版本是 0.9.something）。
I don't speak from experience, but here are some email threads from the luabind-user mailing list: first, a monologue by a guy trying to do exactly what you want. Second, somewhat old (Nov 2009) email from the luabind maintainer, stating that providing custom __newindex metamethod is not currently possible, but planned for 1.0 (current version is 0.9.something).