[1.12.1] Lua Binding / Object-Oriented Access Question

[DarkLinux]

What I'm trying to do is something like this,

player = objManager.GetPlayer(i)
player:interact()

My problem is not registering functions, its passing an object to a function.

Currently, I'm doing this,

player = GetPlayer(i)
interact(player)

I have been following some guides like this,
Programming in Lua : 28.3

c&p version with less code

struct NumArray{
	int size;
};
static int newarray(lua_State l){
	int n = lua_tonumber(l, 1);
	NumArray *a = (NumArray *)lua_newuserdata(l, sizeof(NumArray));
	a->size = n;
	return 1;
}
static int printarray(lua_State l)
{
	NumArray *a = (NumArray*)lua_touserdata(l, 1);
	printf("%d", a->size);
	return 0;
}
luaL_Reg arraylib_f[] = 
{
	{ "new", newarray },
	{ NULL, NULL }
};
luaL_Reg arraylib_m[] =
{
	{ "print", printarray },
	{ NULL, NULL }
};
int luaopen_array (lua_State *L) {
	luaL_newmetatable(l, "LuaBook.array");

	lua_pushstring(l, "__index");
	lua_pushvalue(l, -2);
	lua_settable(l, -3);

	luaL_openlib(l, NULL, arraylib_m, 0);
	luaL_openlib(l, "array", arraylib_f, 0);
}

A big problem is I'm limited to Lua 5.0 and some lua functions look to be missing or I have not been able to find them.

Current ones I have found,
http://www.ownedcore.com/forums/worl...ml#post3796321 ([WoW] 1.12.1.5875 Info Dump Thread)

The error I'm getting from,

a = array.new(1)	
a:print();

is "attempt to index global `a'(a userdata value)".

Anyone know what I'm doing wrong? Thanks!

[DarkLinux]

Solved, missed something from the previous page

struct NumArray{
	int size;
};
static int newarray(lua_State l){
	int n = lua_tonumber(l, 1);
	NumArray *a = (NumArray *)lua_newuserdata(l, sizeof(NumArray));

	luaL_getmetatable(L, "LuaBook.array");
	lua_setmetatable(L, -2);

	a->size = n;
	return 1;
}
static int printarray(lua_State l)
{
	NumArray *a = (NumArray*)lua_touserdata(l, 1);
	printf("%d", a->size);
	return 0;
}
luaL_Reg arraylib_f[] = 
{
	{ "new", newarray },
	{ NULL, NULL }
};
luaL_Reg arraylib_m[] =
{
	{ "print", printarray },
	{ NULL, NULL }
};
int luaopen_array (lua_State *L) {
	luaL_newmetatable(l, "LuaBook.array");

	lua_pushstring(l, "__index");
	lua_pushvalue(l, -2);
	lua_settable(l, -3);

	luaL_openlib(l, NULL, arraylib_m, 0);
	luaL_openlib(l, "array", arraylib_f, 0);
}

Now this works!

a = array.new(1)	
a:print();

[DarkLinux]

Next problem

If I want to read and write vars like,

a = array.new(1)	
a.var = 1;
c = a.var;

I need to add,

int FASTCALL l_set(lua_State L)
{
	NumArray *n = (NumArray*)lua_touserdata(L, 1);
	const char *key = lua_tostring(L, 2);
	int val = lua_tonumber(L, 3);

	printf("%s = %d\n", key, val);
	return 0;
}

int FASTCALL l_get(lua_State L)
{
	NumArray *n = (NumArray*)lua_touserdata(L, 1);
	const char *key = lua_tostring(L, 2);

	printf("%s\n", key);
	return 0;
}

luaL_Reg arraylib_m[] =
{
	{ "__index", l_get },
	{ "__newindex", l_set },
	{ "print", printarray },
	{ NULL, NULL }
};

But when I do that I can no longer call print, it end up calling l_get with the error

attempt to call field `print' (a number value)

Anyone know I how I would go about fixing this?

-----

Think I found a solution, yet I cant get my head around it

Lua/C++ : __index is always invoked even the table's field is known - Stack Overflow

-----

Also looking over, Programming in Lua : 28.4 feel like its missing some key things...

Willing to pay for fix, also its for a free project (oGasai Déjà Vu - WoW 1.12.1 Vanilla Bot)