Am 07.12.2016 07:11, schrieb Jean-Philippe André: > Hey Conr2d, > > On 6 December 2016 at 13:33, Conrad Um<con...@gmail.com> wrote: > >> Dear friends, >> >> I'm a big fan of vala (if you don't know what vala is, please see this link >> <https://wiki.gnome.org/Projects/Vala>), and writing a vala binding >> generator for EFL. >> >> Vala has a syntax similar to C# and has managed feature based on reference >> counting, but basically it just converts .vala files to .c files to compile >> them with gcc and gobject library. >> >> My experimental generator can create VAPI files for having vala recognize C >> APIs, but only support compact class type which is not a full-featured vala >> class type. >> (Because complete vala class is based on gobject system. You can see the >> difference of compact and complete class here >> <https://wiki.gnome.org/Projects/Vala/FAQ#What_does_.5BSimpl >> eType.5D_and_.5BCompact.5D_in_bindings_mean.3F> >> .) >> If I want to use all features supported in vala, I should make a wrapper >> class like in eolian_cxx. >> >> By the way, it comes to my mind that makes vala generate c code based on eo >> instead of gobject. It can be used by application developers, but I think >> even EFL developers can write libraries with modern language. >> >> Currently, we should write 2 files (.c and .eo) per class at least. >> However, vala with eo backend only requires 1 vala file. >> >> For example, >> >> public class Elm.Button : Elm.Layout, Efl.Ui.Clickable, >> Elm.Interface.Atspi_Widget_Action >> { >> /* elm_widget_button.h, contents of private header */ >> private double ar_initial_timeout; >> private double ar_gap_timeout; >> private Ecore.Timer? timer; // question mark means nullable >> private bool repeating; >> >> /* events */ >> public signal void clicked(); >> public signal void repeated(); >> >> /* elm_button.c, property setter/getter body */ >> public bool autorepeat { >> set { >> timer = null; // To assign null to 'timer' will unref timer. >> autorepeat = value; >> repeating = false; >> } >> get { >> return autorepeat& admits_autorepeat; >> } >> } >> >> /* elm_button.c, private function body */ >> private void activate() { >> timer = null; >> repeating = false; >> /* if property getter is set, the next condition will be (!disabled >> && !freeze_events) */ >> if (!disabled_get()&& !freeze_events_get()) >> clicked(); // invokes callbacks for "clicked" events >> } >> >> /* elm_button.c, override Efl.Canvas.Group.group_add() */ >> public override group_add() { >> base.group_add(); // efl_super >> sub_object_parent_add(); >> >> /* lambda expression */ >> resize_obj.signal_callback_add("elm,action,click", "*", (emission, >> source) => >> { >> activate(); >> }); >> >> access_object_register(resize_obj); >> can_focus_set(true); >> >> theme_set("button", "base", style_get()); >> } >> ... >> } >> >> With vala file like above, valac (vala compiler) with eo backend will be >> able to generate several files we need. (public header, private header, c >> file including .c and .eo.c contents) >> Moreover, header and c files generated by valac are simple c source files, >> so they can be compiled with existing code or c file written in c from the >> beginning (not generated). >> I know all EFL developers are C expert, and you may never feel need of >> redundant tools except for C. However I think if you want EFL to advance >> further and continuously, we should investigate how we can adapt modern >> concepts, knowledge and ideas on our works. >> >> It's just a suggestion, but if there is any one interested in this idea, we >> can start new project for the future. :D >> > I was wondering when you would go public with your idea :)
See [1] and [2]. > Will you publish your current code somewhere? You have a private repo on > git.e.org. > > I think this is really cool as it seems to generate a (almost?) > zero-overhead binding in a friendly language. > I know nothing about C# or Vala, although I know they only look similar, > they are not the same language. > > I doubt we would use this inside the EFL codebase itself but I can > definitely see the value in a new language binding. > > If only the EFL interfaces could be completed already... > > Best regards > Sadly to say, I cannot provide evidence why Microsoft has developed C# with its managed code in this way. But for everybody who is open minded I can give the hint that it has something in common with metadata and ontologies as well as my developements in 1997 to 2003. Form time to time I work a little on details of this (see again [2]). Regards C.S. [1] Ontologics OntoLix officially started, 9th of November 2014 (www.ontomax.com/newsarchive/2014/november.htm#09.November.2014) [2] Ontonics, OntoLab, Ontologics, OntoLix and OntoLinux Further steps, 20th of January 2015 (www.ontomax.com/newsarchive/2015/january.htm#20.January.2015) ------------------------------------------------------------------------------ Developer Access Program for Intel Xeon Phi Processors Access to Intel Xeon Phi processor-based developer platforms. With one year of Intel Parallel Studio XE. Training and support from Colfax. Order your platform today.http://sdm.link/xeonphi _______________________________________________ enlightenment-devel mailing list enlightenment-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/enlightenment-devel
