binary module call lua function

[azerty2016]

Hi,
I am learning how to make binary module and I have an error with my code, I can't find the solution:
I would like to call this function in this lua code in c++:

T = {}

function T:test(id, data)
	print(id)
	PrintTable(data)
end

T:test("id", {text = "text", color = { r = 0, g = 255, b = 0, a = 255}})

I have tried this (main.cpp):

#define GMMODULE

#include "Interface.h"

GarrysMod::Lua::ILuaBase *LAU;

void test(const char* text, const double r, const double g, const double b, const double a)
{
	LAU->PushSpecial(GarrysMod::Lua::SPECIAL_GLOB);
		LAU->GetField(-1, "T");
			LAU->GetField(-1, "test");
				LAU->PushString("id");
				LAU->CreateTable();
					LAU->PushString(text);
					LAU->SetField(-2, "text");
					LAU->CreateTable();
						LAU->PushNumber(r);
						LAU->SetField(-2, "r");
						LAU->PushNumber(g);
						LAU->SetField(-2, "g");
						LAU->PushNumber(b);
						LAU->SetField(-2, "b");
						LAU->PushNumber(a);
						LAU->SetField(-2, "a");
					LAU->SetField(-2, "color");
			LAU->Call(2, 0);
		LAU->Pop();
	LAU->Pop();
}

GMOD_MODULE_OPEN()
{
	LAU = LUA;
	test("text", 0, 255, 0, 255);
	return 0;
}

GMOD_MODULE_CLOSE()
{
	return 0;
}

And when the test function is executed I got a Lua Panic error:
"lua/includes/extensions/table.lua:711: bad argument #1 to 'pairs' (table expected, got nil)"

Can you help me please ?

[sannys]

That looks like PrintTable throwing an error with its call to [img]http://wiki.garrysmod.com/favicon.ico[/img] [url=http://wiki.garrysmod.com/page/table/GetKeys]table.GetKeys[/url]

The [B]test[/B] function is defined with [B]:[/B] instead of [B].[/B]
This means that there is an additional hidden parameter in the function definition, which serves as the [B]self[/B] reference. In your module, you are calling your function with only 2 arguments: the ID and data table, but you aren't passing the self reference, which needs to be the first argument.
[lua]-- There are THREE parameters here.
-- self, id, data
function T:test(id, data)
...
end

-- This is the same thing as the above.
function T.test(self, id, data)
...
end

-- This...
T:test("id", {text = "text", color = { r = 0, g = 255, b = 0, a = 255}})

-- ...is the same thing as this.
T.test(T, "id", {text = "text", color = { r = 0, g = 255, b = 0, a = 255}})[/lua]
The easiest solution would be to change T:test to T.test and not use a self reference, but if for whatever reason you need to use a self reference here, you can just do LAU->Push(-2) before pushing the string and change the call to use 3 arguments. More info [URL="https://www.lua.org/pil/16.html"]here[/URL].

[Lapin]

I used this (for static lua funcs tho)

#include "GarrysMod/Lua/Interface.h"
#include <stdio.h>
#include <Windows.h>
#include <string>
using namespace GarrysMod::Lua;

char tmpstr[4096];

typedef void(*msg)(char const* pMsg, ...);
typedef int(*loadbuffer)(lua_State *state, const char *buff, size_t sz, const char* name);
typedef int(*lual_error)(lua_State *L, const char *fmt, ...);

HMODULE lua_shared = GetModuleHandle("lua_shared.dll");
HMODULE tier0 = GetModuleHandle("tier0.dll");



loadbuffer luaL_loadbuffer = (loadbuffer)GetProcAddress(lua_shared, "luaL_loadbuffer");
msg Msg = (msg)GetProcAddress(tier0, "Msg");
lual_error luaL_error = (lual_error)GetProcAddress(lua_shared, "luaL_error");



int luaL_dostring(lua_State* state, std::string code, const char* name)
{
	int ret = luaL_loadbuffer(state, std::string(code).c_str(), strlen(std::string(code).c_str()), name);
	if (ret)
	{
		luaL_error(state, "Could not compile Code");
		return 1;
	}
	if (LUA->IsType(-1, Type::FUNCTION))
	{
		LUA->Call(0, 0);

		return 0;
	}

	return 1;
}

[azerty2016]

Thanks you sannys it works !
Maybe do you know a library in c++ which does the same thing as the Timer lua library ?
pierre what is the connection with your code, thanks you anyway ?