[Vala] Error in GLib.EnumClass binding (Re: Display values of an enum.)

[Jan Hudec <bulb ucw cz>]

On Sat, Jul 10, 2010 at 19:20:34 +0000, Peterpaul Klein Haneveld wrote:
> ---
>  start of EnumTest.vala:
> enum EnumTest {TEST1, TEST2, TEST3}
>
> void
>  main() {
>     EnumClass enumClass = (EnumClass) typeof 
> (EnumTest).class_ref();
>     unowned EnumValue[] falues = 
> enumClass.values;
>     for (int i = 0; i < falues.length; i++) {

I believe vala supports foreach-style syntax here, but I am not certain
enough of the exact syntax to write it off the top of my head.

>  unowned EnumValue falue = falues[i]; 
>         stdout.printf("%s", 
> falue.value_name);
>     }
> }
> --- end of EnumTest.vala.
>
> $ valac EnumTest.vala 
> /home/peterpaul/projects/vala/EnumTest.vala.c:
>  In function ‘_vala_main’:
> /home/peterpaul/projects/vala/EnumTest.vala.c:45:
>  warning: assignment from incompatible pointer type
> /home/peterpaul/projects/vala/EnumTest.vala.c:45:
>  error: ‘GEnumClass’ has no member named ‘values_length1’
> error: cc 
> exited with status 256
> Compilation failed: 1 error(s), 0 warning(s)

The warning can be safely ignored I believe (though it is a bug in valac --
it should know to emit correct cast). The error is caused by error in the
bindings.

The GLib.EnumClass.values member in gobject-2.0.vapi needs annotation:

    [CCode (array_length_cname = "n_values", array_length_type = "guint")]

(the same annotation is correctly used in other places in the file, e.g. the
ValueArray class).

The Glib.FlagsClass.values member needs the same annotation, too.

-- 
                                                 Jan 'Bulb' Hudec <bulb ucw cz>