Re: Why is post_event deprecated?

[Dirk Zimoch <dirk.zimoch@psi.ch>]

Hi Till,

I don't know if there are any plans to skip support for post_event(). 
Probably not soon because nobody knows how much code there is using it.
But how to tell people to switch to the newer function if not marking 
the old one deprecated? If the compiler does not warn, many people would 
probably not even notice the new feature.
The compatibility implementation of post_event() is a bit of a hack and 
as seen in the thread "Scanning on event number fails with EPICS 3.16" 
it is not without issues.
But when committing the fix, I will probably remove the deprecated 
marker. (Tomorrow, now it's 6pm.)
Dirk

On 08.02.2018 16:45, Till Straumann wrote:
> On 02/08/2018 12:45 AM, Dirk Zimoch wrote:
> > Hi Tim
> >
> > Isn't that what "deprecated" means: supported but discouraged?
> I thought it also indicates that support will go away (which would make
> maintaining applications that need to be built against newer as well
> as older versions of epics a pain).
>
> A side-effect are many compiler warnings that could obscure more
> serious issues.
> > Dirk
> >
> > On 07.02.2018 00:43, Till Straumann wrote:
> > > I'm using some (old) code with 3.15.5 and learned that
> > > post_event() had been deprecated in favour of postEvent().
> > >
> > > While I have no real problems with the new flavour which
> > > in some cases might be really nice - I do question the
> > > decision to deprecate post_event() (rather than, let's say
> > > discourage its use for new applications but continue to
> > > support it).
> > >
> > > 1.) There are probably many existing applications out there
> > >      using post_event(). People have better things to do than
> > >      migrating to the new version.
> > > 2.) The backwards-compatibility solution currently in place
> > >      is cheap.
> > > 3.) People might have to use code with both, 3.15+ as well
> > >      as older versions. It is a pain to have to maintain
> > >      #ifdefs for this.
> > >
> > > My two cents...
> > >
> > > Best
> > > - Till