On Mo, 11 Jun 2018, Bram Moolenaar wrote:

> 
> Ken Takata wrote:
> 
> > 2018/6/11 Mon 8:11:18 UTC+9 Takuya Fujiwara wrote:
> > > 2018年6月11日(月) 3:01 Bram Moolenaar <[email protected]>:
> > > 
> > > Takuya Fujiwara wrote:
> > > 
> > > > > If I don't misunderstand, it seems has('win95') always returns 0 (no
> > > > > entry at f_eval() in evalfunc.c).
> > > > > But it remains in feature-list.
> > > > > I created a patch to remove the line.
> > > > 
> > > > I think we can keep the line, since the feature did exist at some point,
> > > > but add a remark that this will always be False.
> > > 
> > > hmm, "win16" also did exist but it was removed from feature-list.
> > > so I thought this also should be removed.
> > 
> > If we keep "win95" in the feature-list, we should restore not only "win16"
> > but also "dos16", "dos32" and "os2", I think.
> 
> We don't need to keep old feature names listed forever, just the ones
> where a user might wonder what the name is for.  E.g. when it is found
> in an (old) plugin.  So it's rather arbitrary which ones we keep.
> Perhaps "dos32" is still relevant?  "win16" and "dos16" are really old
> and stopped working quite a while ago.

Not sure if the following is relevant or contributes to this discussion, 
but here is what came up when searching github:

has("win95"): 38,393 results 
https://github.com/search?l=Vim+script&q=has%28%22win95%22%29+language%3A%22Vim+script%22&type=Code

has("win16"): 70,269 results
https://github.com/search?l=Vim+script&q=has(%22win16%22)+language%3A%22Vim+script%22&type=Code

has("dos32"): 8,484 results
https://github.com/search?l=Vim+script&q=has(%22dos32%22)+language%3A%22Vim+script%22&type=Code

has("dos16"): 8,279 results
https://github.com/search?l=Vim+script&q=has%28%22dos16%22%29+language%3A%22Vim+script%22&type=Code

has("os2"): 5,780 results
https://github.com/search?q=has%28%22os2%22%29+language%3A%22Vim+script%22&type=Code

Best,
Christian
-- 
Die einzige Voraussetzung für den Triumph des Bösen ist, daß gute
Menschen nichts tun.
                -- Edmund Burke

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