the old safe method :
public static void main (string[] args) {
Value? v = "toto";
Value val = {};
val.init (v.type());
v.copy (ref val);
print ("%s\n", (string)val);
}
p.s. : sorry for last message (*$£% gmail)
2015-01-29 16:48 GMT+01:00 Guillaume Poirier-Morency <
[email protected]>:
> Le jeudi 29 janvier 2015 à 15:30 +0100, yannick inizan a écrit :
> > Vala translate your cast to a get_<type> function of your value.
> >
> > ex:
> > Value v = "toto";
> > var val = (string)v; //equals to 'var val = v.get_string();'
> >
> > so (Value)my_val is impossible because GLib.Value doesn't have a
> > get_value function.
> >
> > 2015-01-29 15:16 GMT+01:00 Guillaume Poirier-Morency
> > <[email protected]>:
> > I am working on Valum, a web micro-framework written in Vala
> > https://github.com/antono/valum
> >
> > valac is generating very strange code that doesn't compile.
> >
> > Part of the framework is about offering facilities to push
> > arbitrary
> > values into CTPL template environment.
> >
> > At some point, I try to case a Value? to a non-null Value (I
> > have of
> > course tested the null case, I just want it to pass under
> > --enable-experimental-non-null)
> >
> > vala --version
> >
> > Vala 0.26.1
> >
> > Here's the use case:
> >
> > Value? v;
> > var val = (Value) v;
> >
> > The error:
> >
> >
> > lvalue required as unary '&' operand
> >
> > I attached the full log and the bug is easily reproducible
> > (the sample
> > does it).
> >
> > --
> > Guillaume Poirier-Morency <[email protected]>
> >
> > _______________________________________________
> > vala-list mailing list
> > [email protected]
> > https://mail.gnome.org/mailman/listinfo/vala-list
> >
> >
> >
>
> Thanks for the answer!
>
> That kind of code should be detected by Vala compiler as an error.
>
> What approach would you recommend to cast "Value?" to "Value" ?
>
> It's not that bad if it is not yet possible, but I would really like to
> build the whole projet with --enable-experimental-non-null ;)
>
>
> --
> Guillaume Poirier-Morency <[email protected]>
>
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