[Vala] Fwd: Define constant at compile time

[pancake <pancake youterm com>]

Begin forwarded message:

> From: pancake <pancake youterm com>
> Date: November 16, 2010 8:28:38 PM GMT+01:00
> To: Aleksander Wabik <alex wabik gmail com>
> Subject: Re: [Vala] Define constant at compile time

> Use -D
>
> Using this in source just opens the door to weird design problems.  
> It's a design decission, not a bug
>
> Else you just have to use const string which translates into a define
>
> On Nov 16, 2010, at 6:42 PM, Aleksander Wabik <alex wabik gmail com>  
> wrote:
>
> > > Hi all,
> > >
> > > I'm new to Vala and I'd like to have some help to solve a small but
> > > frustrating problem. Basically, I have a Gtk.UIManager that I want  
> > > to
> > > initialize in this way:
> > >
> > > var ui_manager = new Gtk.UIManager();
> > > ui_manager.add_ui_from_file(UI_FILE);
> > >
> > > I want to specify the constant UI_FILE at compile time, but I  
> > > don't know
> > > how to do that. In C I would write something like that:
> > >
> > > #ifndef UI_FILE
> > > #define UI_FILE "default-path.xml"
> > > #endif
> > >
> > > and then I would call gcc with the option -DUI_FILE="something".  
> > > I've
> > > tried to use the -D option of the Vala compiler, but it doesn't  
> > > seem to
> > > work as I expect. Any ideas?
> > >
> > > Many thanks,
> > > Andrea
> >
> > AFAIK it's not possible, and my humble request would be to consider
> > developing vala preprocessor into something useful. I want to use it
> > too ;)
> >
> > best regards,
> >
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