return value of lua_dostring

[Luiz Henrique de Figueiredo <lhf@...>]

>How can I get the return value of the Lua chunk executed by lua_dostring
>from the C side, i.e. like getting the result returned by the Lua dostring
>function?

Just like the return values of any function.
Here is an example:

  lua_State *L=lua_open(0);
  printf("%d\n",lua_gettop(L));
  lua_dostring(L,"return 1,'a'");
  printf("%d\n",lua_gettop(L));
  printf("%s\n",lua_tostring(L,-2));
  printf("%s\n",lua_tostring(L,-1));

In general, you should take the k top values in the stack, where k is
the difference between lua_gettop(L) before calling lua_dostring and
lua_gettop(L) after calling it, that is, for indices from -1 to -k.
--lhf