Is it possible to send var-args (...) to a native function?

[Charles Curran <smokeandmirrorsdevelopment@...>]

I've run into a surprise in the C API.  I have this code in Lua:

construct(...)

but when I try and operate on the arguments in C++

int construct(lua_State* L)
{
   int stack_size = lua_gettop(L);
   ....
   return 0;
}

the value of stack_size here is 0, no matter how many arguments are passed into the function construct in Lua.  Is it not possible to process var-args from the C API?

Cheers,
Carlos