lua_pushobject

["Victor Bombi" <sonoro@...>]

Hello,

May be someone could help me to understand.

I have used lua_pushobject described in 
http://lua-users.org/wiki/DoItYourselfCppBinding

I am not able to understand the difference between:

soundFileSt *sndf = (soundFileSt *)lua_newuserdata(L, sizeof(soundFileSt));
luaL_getmetatable(L, "soundFileSt ");
lua_setmetatable(L, -2);

and

soundFileSt *sndf = (soundFileSt *)lua_pushobject(L, soundFileSt)();

They must be different because the first makes my module to crash but not 
the second.

Thank you for your attention
victor bombi