I was using LUA like 15 years ago :) So, well, I have forgotten how it worked :) Also I have forgotten how exactly it was called what I want to make so I have trouble googling it.

I need a very simple thing only, a lua script that calls my C++ functions. I recall you were initailizing lua, then specified which lua script to parse (filename) and then define "binding" or was it "registering" a function?

I don't need other fancy stuff, only this.

EDIT: It seems the function I used in the past was lua_register which was deprecated and now you use some "table" thing? Below is a code that compiles but has no effect (luaPrint not working):

int luaPrint(lua_State *L)
{

	tPrint("%s\n", lua_tostring(L, -1));
}

int testLua()
{
    lua_State *L = luaL_newstate();

    luaL_Reg Regs[] =
    {
        { "print", luaPrint },
        { NULL, NULL }
	};

    lua_newtable(L);
    luaL_setfuncs(L,Regs,0);
    lua_pushvalue(L,-1);

    if(luaL_dofile(L, "test.lua"))
    {
        tPrint("Error:%s\n", lua_tostring(L, -1));
    }

  lua_close(L);
  return 0;
}

Check out Selene, it's very easy to set up and use.

Can't it be done with pure lua? I recall it was a very trivial thing, just a few lines of code...