Re: passing a reference to a primitive?

I've just installed the default luabind package on Fedora 17, and I can
confirm it has the same issue. :-/

Doh!

Nigel

On Tue, 2012-11-06 at 13:57 -0600, Cory Riddell wrote:
> I've been working through some of the examples and I can't figure out
> what's wrong.
> 
> I have a function that takes a reference to a double:
> 
>   void fn(double& value) {
>     value += 3.4;
>   }
> 
> I bind it with code that looks something like:
> 
>   module(L) [
>     def("fn", fn)
>   ]:
> 
> Then try to run it:
>  
>   luaL_dostring(
>     L,
>     "fval = 3.2\n"
>     "fn(fval)\n"
>   );
> 
> I get back an error that says something like:
> 
>   No matching overload found, candidates:
>   void fn(custom [double]&)
> 
> I've tried being super-specific by binding fn like this:
> 
>   def("fn", (void(*)(double&)fn)
> 
> but I get the same result. I'm really trying to use the out_value
> policy, but I can't even get this to compile:
> 
>   def("fn", fn, out_value(_1))
> 
> FWIW, I'm using VS2010.
> 
> I'm starting to wonder if I should just stick to the Lua's C api and try
> to keep my dependencies to a minimum. Frankly, when I try to figure out
> how luabind is working, it pretty much looks like magic.
> 
> The canonical version of luabind doesn't appear to be maintained any
> more. I know some people on this list are maintaining forks and I'm
> wondering if their version of luabind works for what I'm trying to do?
> I've started to play with boost-python. It seems much heavier and more
> complicated, but also more active.
> 
> Advice and suggestions welcomed!
> 
> Thanks,
> Cory
> 
> 
> 
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