Re: Best way to have table-like fields on userdata

[dcharno <dcharno@...>]

> What is the best way to support something akin to table like fields on 
> userdata, so you can have:
>
> foo.status = 201
> foo:puts("hello world")
>
> where foo is a userdata?

I create a table and set it as the userdata's environment for storing 
fields.  In the index and newindex metamethods, retrieve the field from 
the environment:

   int mynewindex( lua_State *L )
   {
      lua_getfenv( L, 1 );
      lua_replace( L, 1 );
      lua_rawset( L, 1 );
      return 0;
   }

   int myindex( lua_State *L )
   {
      lua_getfenv( L, 1 );
      lua_pushvalue( L, 2 );
      lua_rawget( L, -2 );
      return 1;
   }