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I think Jeremy know this way and it is a wrong way. the __index and __newindex is called only that there is no the global variable. For variable Foo, it exised in the _G, so the __index or __newindex was not called. You can create a proxy table and put all global variabl in the proxy table, but you must replace _G's __index and __newindex metamethod at first. In your __index and __newindex metamethod, you call the readers and writers respectively, then get value from proxy table or change value in the proxy table. > Date: Wed, 29 Aug 2007 21:46:22 +0200 > Subject: Re: Global variable __index and __newindex? > From: julien.hamaide@10tacle.be > To: lua@bazar2.conectiva.com.br > > > I need a way to provide an __index and __newindex method for global > > variables. Is there an easy way to go about this? > > > > What I mean is that if I have a variable (call it Foo) when I use it I > > want > > it to call readers and writers in my source code instead. I know I can > > overwrite the default global handlers but that seems a bit of the wrong > > way. > > > > -- > > Jeremy > > > > "Help I suffer from the oxymoron Corporate Security." > > > > you can call lua_setmetatable with LUA_GLOBALSINDEX as stack index, it > will set the metable for the global table. Just set the __index and > __newindex field as usual to the meta table and it should call your method > when accessing globals > > Julien Hamaide 不登录就能管理多个邮件帐户，试试 Windows Live Mail。 立即尝试！ |