Re: How to bind a static member variable

if A::a is a static const, you don't really need a reference to that exact instance, but rather only the value in the correct namespace in Lua. I haven't touched luabind in a while, so treat the following more like pseudo code:

lua_State* L = ...
luabind::object _G = luabind::globals(L);
_G["A"] = luabind::newTable();
_G["A"]["a"] = luabind::object();
_G["A"]["a"] = A::a;

I must admit I forgot how to correctly implement that last assignment. Again, it's been a while. 
Basically, what you should try is to write the luabind C++ equivalent of the following lua code:

_G.A = {}
_G.A.a = <your value>

hth,
Tony


On 08.04.2013, at 20:45, Ryan Pavlik <[email protected]> wrote:

> 
> On Mon, Apr 8, 2013 at 6:33 AM, Lorenzo Pistone <[email protected]> wrote:
>     #include <luabind/luabind.hpp>
>     struct A{
>         static const A a;
>     };
>     const A A::a;
>     int main(){
>         luabind::scope sc = luabind::class_<A>("A")
>         .scope[luabind::def_readonly("a", &A::a)];
>     }
> 
> It seems as though while functions can be registered "globally" (in a namespace rather than a class member), no such provision was made for variables/data.  I've added a test here: https://github.com/rpavlik/luabind/blob/static-members/test/test_static_member.cpp  - the version committed succeeds but uncommenting the data members causes a compile failure just as you had noticed. (There is a luabind::def function that mimics the .def member of luabind::class_, but no such luabind::def_readonly...)  I'm not sure if a workaround of setting the variable would work - I've had a tough time trying to figure out how to bind references to values/data to Lua with LuaBind.
> 
> Ryan
> 
> 
> -- 
> Ryan Pavlik
> HCI Graduate Student
> Virtual Reality Applications Center
> Iowa State University
> 
> [email protected]
> http://academic.cleardefinition.com
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