Re: Trivial pointers result in unregistered class

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give boost:ref a try...

luabind::globals(L)["x"] = boost::ref(x);


On Tue, Jun 18, 2013 at 10:41 AM, Daniel Walter <
[email protected]> wrote:

> Hi folks,
>
> I have a struct with some pointers to trivial datatypes like this:
>
> struct A {
>      int* x;
>      int* y;
> };
>
> I bound it to lua like this:
>
> luabind::module(L)
> [
>       luabind::class_<A>("A")
>      .def_readonly("x", &A::x)
>      .def_readonly("y", &A::y)
> ];
>
> If I am using this class in my lua script the runtime throws this
> exception: "Trying to use unregistered class"
> I managed this using a getter function returning the dereferenced
> pointer, but there must be a better way.
>
> The same exception happens when i am using such an trivial pointer
> directly:
>
> int* x = new int(42);
> luabind::globals(L)["x"] = x;
>
> How to handle this? What i am missing?
>
> Thanks in advance,
> Daniel
>
>
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<div dir=3D"ltr">give boost:ref a try...<div><br></div><div><span style=3D"=
font-family:arial,sans-serif;font-size:12.800000190734863px">luabind::globa=
ls(L)[&quot;x&quot;] =3D boost::ref(x);</span><br></div></div><div class=3D=
"gmail_extra">
<br><br><div class=3D"gmail_quote">On Tue, Jun 18, 2013 at 10:41 AM, Daniel=
 Walter <span dir=3D"ltr">&lt;<a href=3D"mailto:daniel.walter@helmundwalter=
.de" target=3D"_blank">[email protected]</a>&gt;</span> wrote:=
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Hi folks,<br>
<br>
I have a struct with some pointers to trivial datatypes like this:<br>
<br>
struct A {<br>
=A0 =A0 =A0int* x;<br>
=A0 =A0 =A0int* y;<br>
};<br>
<br>
I bound it to lua like this:<br>
<br>
luabind::module(L)<br>
[<br>
=A0 =A0 =A0 luabind::class_&lt;A&gt;(&quot;A&quot;)<br>
=A0 =A0 =A0.def_readonly(&quot;x&quot;, &amp;A::x)<br>
=A0 =A0 =A0.def_readonly(&quot;y&quot;, &amp;A::y)<br>
];<br>
<br>
If I am using this class in my lua script the runtime throws this<br>
exception: &quot;Trying to use unregistered class&quot;<br>
I managed this using a getter function returning the dereferenced<br>
pointer, but there must be a better way.<br>
<br>
The same exception happens when i am using such an trivial pointer directly=
:<br>
<br>
int* x =3D new int(42);<br>
luabind::globals(L)[&quot;x&quot;] =3D x;<br>
<br>
How to handle this? What i am missing?<br>
<br>
Thanks in advance,<br>
Daniel<br>
<br>
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</blockquote></div><br></div>

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