Re: Error trying to export class

How do you Link against luabind and Lua? Static or dlls? I've only used static builds and there are some things you have to take care of when you Link dynamically. There were quite a few posts regarding this topic in the List. If you can Build a testcase within a Single cpp file that fails then others could try it easier.




On 31.12.2010, at 21:25, Ferran Ferri <[email protected]> wrote:

> I'm programming in Visual C++ 2008 and luabind 0.9.1. System is Win7 64bits.
> 
> The part that is annoying me is that this works fine:
>     luabind::module(L)
>         [
>             luabind::class_<testclass>("testclass")
>             .def(luabind::constructor<const std::string&>())
>             .def("print_string", &testclass::print_string)
>         ];
> 
> And script:
> function func(first, second)
>     a = testclass('a string')
>     a:print_string()
>   return 0
> end
> 
> In addition I can say that program fails after the constructor is callled. In script, this line works ok:
>      MyPoint = Point2D()
> (and even      MyPoint = Point2D )
> But 
>     MyPoint:setXY(3,4)
> and 
>     MyPoint:printXY()
> fails, enven independently called.
> 
> Thanks
> Ferran
> 
> 
> On Fri, Dec 31, 2010 at 6:53 PM, Tony Kostanjsek <[email protected]> wrote:
> sorry, just saw those were the 2 + 3 params from the C++ call. If it isn't the constructor call, maybe you are using DLLs and the build is broken. Post some more details, OS, compiler, how you build.
> 
> Von: Ferran Ferri <[email protected]>
> An: [email protected]
> Gesendet: Freitag, den 31. Dezember 2010, 17:48:17 Uhr
> Betreff: [luabind] Error trying to export class
> 
> Hello all, I have a question. I'm a newbie: First, this is my c++ code
> #include <iostream>
> #include <cstdlib>
> 
> extern "C" {
>  #include "lua.h"
>  #include "lualib.h"
>  #include "lauxlib.h"
> }
> 
> #include "luabind/luabind.hpp"
> 
> using namespace std;
> 
> class Point2D{
> int _x,_y;
> public:
> Point2D():_x(0),_y(0){}
> void setXYPoint(int x, int y){_x = x; _y = y;}
> void printPoint(){std::cout << "X = "<<_x<<" Y = "<<_y<<"\n";}
> void publishAPI(const lua_State* L){}
> };
> 
> 
> int main(){
> 
> lua_State *L = lua_open();
> 
> // Connect LuaBind to this lua state
> luabind::open(L);
> luaL_openlibs(L);	
> luabind::module(L)[
> luabind::class_<Point2D>("point2d")
> .def(luabind::constructor<>())
> .def("print",&Point2D::printPoint)
> .def("setXY",&Point2D::setXYPoint)
> ];
> 
> // Define a lua function that we can call
> luaL_dofile(L,"main.lua");
> try{ 
> std::cout << "Result: "
> << luabind::call_function<int>(L, "func", 2, 3)
> << endl;
> lua_close(L);
> }
> catch(const std::exception& e){
> std::cout << e.what() << std::endl;
> }
> return EXIT_SUCCESS;
> 
> }
> 
> And this is my lua script
> 
> function func(first, second)
>  	MyPoint = point2d
>   	MyPoint:setXY(3,4)
>    	MyPoint:print()
>   return first + second
> end
> 
> The only result I always get is "lua runtime exception". But the program compiles fine and it seems legal. Could you help me please? This is very similar to others samples.
> 
> Another question is: how do I get a more detailed error message? I always get "lua runtime exception" and I need a more comprehensive error
> 
> Thanks in advance.
> Ferran
> 
> 
> 
> ------------------------------------------------------------------------------
> Learn how Oracle Real Application Clusters (RAC) One Node allows customers
> to consolidate database storage, standardize their database environment, and,
> should the need arise, upgrade to a full multi-node Oracle RAC database
> without downtime or disruption
> http://p.sf.net/sfu/oracle-sfdevnl
> _______________________________________________
> luabind-user mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/luabind-user
> 
> 
> ------------------------------------------------------------------------------
> Learn how Oracle Real Application Clusters (RAC) One Node allows customers
> to consolidate database storage, standardize their database environment, and, 
> should the need arise, upgrade to a full multi-node Oracle RAC database 
> without downtime or disruption
> http://p.sf.net/sfu/oracle-sfdevnl
> _______________________________________________
> luabind-user mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/luabind-user

------------------------------------------------------------------------------
Learn how Oracle Real Application Clusters (RAC) One Node allows customers
to consolidate database storage, standardize their database environment, and, 
should the need arise, upgrade to a full multi-node Oracle RAC database 
without downtime or disruption
http://p.sf.net/sfu/oracle-sfdevnl

_______________________________________________
luabind-user mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/luabind-user