Re: Announce - First release of libchamplain's bindings

[Torsten Schoenfeld <kaffeetisch gmx de>]

Emmanuel Rodriguez wrote:
> I finally released to CPAN the first release of libchamplain's bindings
> (Download here http://search.cpan.org/perldoc?Champlain). Libchamplain
> consists of a Clutter actor (a canvas) that supports numerous free map
> sources such as OpenStreetMap <http://www.openstreetmap.org/>,
> OpenArialMap<http://www.openaerialmap.org/>and Maps
> for free <http://www.maps-for-free.com/>.

Congratulations!

> It looks like if the Gtk2/Glib helper methods don't pickup
> ChamplainViewEmbed as a valid GType but I don't know how to fix this.

I think this happens because in champlain-perl.h you include champlain-autogen.h 
before champlain-gtk/champlain-gtk.h.  This means that 
GTK_TYPE_CHAMPLAIN_VIEW_EMBED is not defined when champlain-autogen.h is pulled 
in, so SvChamplainViewEmbed and newSVChamplainViewEmbed don't get defined.

General rule: include foo-autogen.h after all type macros have been defined.

> Another question, are the Perl bindings making a difference for functions
> that return "gchar *" instead of "const gchar *"? From my understading any
> function returning a "gchar *" should have the string freed by the invoker
> while a "const gchar *" should never be freed. Is the bindings code
> performing the free for me or should I do it?

No, 'const gchar*' and 'gchar*' are treated the same.  If a functions returns a 
string that the caller is supposed to free, use 'const gchar_own*' or 'gchar_own*'.