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 < guillaumepoiriermore...@gmail.com>: > 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 > > <guillaumepoiriermore...@gmail.com>: > > 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 <guillaumepoiriermore...@gmail.com> > > > > _______________________________________________ > > vala-list mailing list > > vala-list@gnome.org > > 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 <guillaumepoiriermore...@gmail.com> > _______________________________________________ vala-list mailing list vala-list@gnome.org https://mail.gnome.org/mailman/listinfo/vala-list