Re: Assert thrown calling basic C++ function

Hi Daniel,

It asserts when Lua attempts to call the function in the script (it's only a
one line script of calling the function).

I have the luabind header included in my project for compiling, and I'm
linking to a pre-built static library that I made.

Here are the relevant parts of the code (due to the project's size, I can't
give everything from A-Z but I don't believe any other parts of code such as
the rendering pipeline would cause an issue as it doesn't even touch this
stuff).

Loading Lua/Luabind:
int ScriptingManager::InitLua()
{
	// Open Lua
	m_luaState = lua_open();

	// Load basic libraries
	luaL_openlibs(m_luaState);

	// Open LuaBind
	luabind::open(m_luaState);

	if(m_luaState == NULL)
		return -1;
	else
		return 0; // Success!
}

Defining of function in code, run once:
	luabind::module(GetState())
		[
			luabind::def("sayhello", &sayhello)
		];

Sayhello function, defined in the global namespace:
void sayhello(void)
{
	return;
}

How I'm running my script:
void ScriptingManager::Run(const char* script)
{
	int ret = luaL_dofile(m_luaState, script);
	if(ret != 0)
	{
		if(!lua_isstring(m_luaState, lua_gettop(m_luaState)))
		{
			return;
			
		}

		std::string errorString = lua_tostring(m_luaState,
lua_gettop(m_luaState));
		lua_pop(m_luaState, 1);
	}
	
}

Test.lua (script I'm running) is simply:
Sayhello()

luaL_dofile returns 1

errorString contains the value of: 
"void 
ð­ºsayhello()"

Without quotations however.

Thanks for replying!
~Brian Hughes

> -----Original Message-----
> From: Daniel Wallin [mailto:[email protected]]
> Sent: Wednesday, July 29, 2009 1:04 AM
> To: [email protected]
> Subject: Re: [luabind] Assert thrown calling basic C++ function
> 
> On 7/29/09 1:11 AM, Brian Hughes wrote:
> > Hello everyone,
> >
> > I’m a new user to both Lua and LuaBind, so I’m hoping I’m just making
> > a simple mistake in my program! I’m implanting Lua/LuaBind into an
> > existing codebase.
> >
> >
> > I’m starting by doing a very basic test of calling a global C++
> > function from within a lua script. Nothing fancy, however it is
> > throwing an assert trying to call the function.
> >
> >
> > I do all of the setup (open lua state, open lua libs, open luabind),
> > then define my function as follows:
> >
> >       luabind::module(gScriptManager->GetState())
> >       [
> >             luabind::def("sayhello", &sayhello)
> >       ];
> >
> >
> >
> > Where sayhello is quite basic:
> >
> >
> > void sayhello(void)
> > {
> >       return;
> > }
> >
> > However, when I try to run a script that only has: sayhello()  in it,
> > luaL_dofile returns a value of 1 (some error, which is supposedly a
> > YIELD error?), and when I use Decoda to debug Lua, it is throwing an
> > assert when it tries to call the function.
> 
> Where does it assert?
> 
> > I’m using Lua 5.1.4 with LuaBind 0.8.1 on MS Visual Studio 2005.
> 
> How are you building luabind? It can obviously handle this basic usage, so
it
> doesn't seem very likely it's a bug in the library. Can you supply the
complete
> failing code (C++ and Lua) please?
> 
> --
> Daniel Wallin
> BoostPro Computing
> http://www.boostpro.com
> 
>
----------------------------------------------------------------------------
--
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008
30-Day
> trial. Simplify your report design, integration and deployment - and focus
on
> what you do best, core application coding. Discover what's new with
Crystal
> Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> luabind-user mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/luabind-user


------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
trial. Simplify your report design, integration and deployment - and focus on 
what you do best, core application coding. Discover what's new with 
Crystal Reports now.  http://p.sf.net/sfu/bobj-july