global index failed?

["陈果" <guo.chen.cn@...>]

Hi, everyone.

 

In my programme, I want to catch the index activity of the global table whenever it failed to get _G[name], so I can provide my userdata to that indexed global variable. But unfortunately I got a failure and I can't figure out the reason. Following is my code fragment:

 

    static int global_resovler(lua_State *L)
    {
   
        printf("global resolver\n");
        return 0;
    }

 

    // in the extension

    // Registers the global resolver
    lua_pushvalue(L, LUA_GLOBALSINDEX);
    lua_getmetatable(L, -1);
    
    lua_pushstring(L, "__index");
    lua_pushcfunction(L, global_resovler);
    lua_rawset(L, -3);

    lua_pushstring(L, "__newindex");
    lua_pushcfunction(L, global_resovler);
    lua_rawset(L, -3);
    lua_pop(L, 1);

 

Can anyone help me figure out why there's no output from the global_resolver when I index a global variable from the script ? Thanks!
--
Best Regards.

Chen guo
Tongji University, China