Re: Calling a member function from C

[Julien Hamaide <julien.hamaide@...>]

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When you call IWindow:new(100, "foo")

actually, IWindow.new(IWindow, 100, "foo") is executed.
: is a syntactic sugar for C++ "thiscall" type. Your object will always
be the first argument ( named self )

so just do this in your code to have the exact equivalent of lua code

lua_getglobal(L, "IWindow");
lua_getfield(L, -1, "new");
lua_pushvalue( L, -2 ); //copy IWindow on top of the stack
lua_pushnumber(L, 100);
lua_pushstring(L, "foo");
if (lua_pcall(L, 2, 1, 0) != 0)
{
  printf("\n%s", lua_tostring(L, -1));
}

Julien

Lyte _ wrote:
> Hello!
> 
> I want to call a lua member function from C, and I can not get it to
> work. This is how I do it now.
> 
>  lua_getglobal(L, "IWindow");
>  lua_getfield(L, -1, "new");
>  lua_pushnumber(L, 100);
>  lua_pushstring(L, "foo");
>  if (lua_pcall(L, 2, 1, 0) != 0)
>  {
>    printf("\n%s", lua_tostring(L, -1));
>  }
> 
> I have a class in lua called IWindow, and it has a member function
> called new. So I want to do IWindow:new(100,"foo") basicly. But for some
> strange reason, when I arrive in my function, the first parameter is
> "foo" and the second parameter is nil. So where has the number (100)
> gone? I'm sure the error is just something small, but I do not
> understand what it is...
> 
> - Lyte
> 
> _________________________________________________________________
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> 
> 
> 


- --
- --
Julien Hamaide
Engineering Coach
10Tacle Studios Belgium / Elsewhere Entertainment
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