From: Austin Ziegler <halostatue@...>
Date: 2019-06-29T13:18:59-04:00
Subject: [ruby-core:93421] Re: [Ruby trunk Feature#14385] Deprecate back-tick for Ruby 3.

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As a counterpoint, when I do write code that executes an external program,
I have not used `program` for years, preferring %x{program}.

-a

On Fri, Jun 28, 2019 at 1:35 PM <eregontp@gmail.com> wrote:

> Issue #14385 has been updated by Eregon (Benoit Daloze).
>
>
> nrodriguez (Nicolas Rodriguez) wrote:
> > You use the same symbol "`" for the begining and the end of the
> instruction which is not a good thing to do when you design a programming
> language as it creates ambiguities.
> > For example with this syntax you can't nest multiple calls.
> > In Bash $() is prefered over backticks for that reason.
> > How would you express such a call with backticks without ambiguities :
> >
> > ~~~ text
> > foo=3D$(echo $(whoami))
> > echo $foo
> > ~~~
> >
> > The example is trivial but I think you got the point ;)
>
> It's just this isn't it?
>
> ```ruby
> foo=3D`echo #{`whoami`}`
> ```
>
> Your argument would also hold for string literals with " and ', yet prett=
y
> much everyone uses them over %s{} %{} etc, unless there is too much nesti=
ng.
> I think backticks is a nice shortcut for shelling out, and should remain.
> There are very few usages of %x{}, and that looks quite ugly to me compar=
ed
> to backticks.
>
> ----------------------------------------
> Feature #14385: Deprecate back-tick for Ruby 3.
> https://bugs.ruby-lang.org/issues/14385#change-78957
>
> * Author: hsbt (Hiroshi SHIBATA)
> * Status: Assigned
> * Priority: Normal
> * Assignee: matz (Yukihiro Matsumoto)
> * Target version:
> ----------------------------------------
> From
> https://bugs.ruby-lang.org/projects/ruby/wiki/DevelopersMeeting20171212Ja=
pan#From-attendees
>
> Matz hopes to deprecate backtick syntax(``) for Ruby 3. We should warn
> about it at Ruby 2.6 (or 2.7?)
>
> We need to consider them.
>
> * warning message
> * warning level
> * ?
>
>
>
> --
> https://bugs.ruby-lang.org/
>
> Unsubscribe: <mailto:ruby-core-request@ruby-lang.org?subject=3Dunsubscrib=
e>
> <http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>
>


--=20
Austin Ziegler =E2=80=A2 halostatue@gmail.com =E2=80=A2 austin@halostatue.c=
a
http://www.halostatue.ca/ =E2=80=A2 http://twitter.com/halostatue

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<div dir=3D"ltr">As a counterpoint, when I do write code that executes an e=
xternal program, I have not used `program` for years, preferring %x{program=
}.<div><br></div><div>-a</div></div><br><div class=3D"gmail_quote"><div dir=
=3D"ltr" class=3D"gmail_attr">On Fri, Jun 28, 2019 at 1:35 PM &lt;<a href=
=3D"mailto:eregontp@gmail.com">eregontp@gmail.com</a>&gt; wrote:<br></div><=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l=
eft-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);pa=
dding-left:1ex">Issue #14385 has been updated by Eregon (Benoit Daloze).<br=
>
<br>
<br>
nrodriguez (Nicolas Rodriguez) wrote:<br>
&gt; You use the same symbol &quot;`&quot; for the begining and the end of =
the instruction which is not a good thing to do when you design a programmi=
ng language as it creates ambiguities.<br>
&gt; For example with this syntax you can&#39;t nest multiple calls.<br>
&gt; In Bash $() is prefered over backticks for that reason.<br>
&gt; How would you express such a call with backticks without ambiguities :=
 <br>
&gt; <br>
&gt; ~~~ text<br>
&gt; foo=3D$(echo $(whoami))<br>
&gt; echo $foo<br>
&gt; ~~~<br>
&gt; <br>
&gt; The example is trivial but I think you got the point ;)<br>
<br>
It&#39;s just this isn&#39;t it?<br>
<br>
```ruby<br>
foo=3D`echo #{`whoami`}`<br>
```<br>
<br>
Your argument would also hold for string literals with &quot; and &#39;, ye=
t pretty much everyone uses them over %s{} %{} etc, unless there is too muc=
h nesting.<br>
I think backticks is a nice shortcut for shelling out, and should remain. T=
here are very few usages of %x{}, and that looks quite ugly to me compared =
to backticks.<br>
<br>
----------------------------------------<br>
Feature #14385: Deprecate back-tick for Ruby 3.<br>
<a href=3D"https://bugs.ruby-lang.org/issues/14385#change-78957" rel=3D"nor=
eferrer" target=3D"_blank">https://bugs.ruby-lang.org/issues/14385#change-7=
8957</a><br>
<br>
* Author: hsbt (Hiroshi SHIBATA)<br>
* Status: Assigned<br>
* Priority: Normal<br>
* Assignee: matz (Yukihiro Matsumoto)<br>
* Target version: <br>
----------------------------------------<br>
From <a href=3D"https://bugs.ruby-lang.org/projects/ruby/wiki/DevelopersMee=
ting20171212Japan#From-attendees" rel=3D"noreferrer" target=3D"_blank">http=
s://bugs.ruby-lang.org/projects/ruby/wiki/DevelopersMeeting20171212Japan#Fr=
om-attendees</a><br>
<br>
Matz hopes to deprecate backtick syntax(``) for Ruby 3. We should warn abou=
t it at Ruby 2.6 (or 2.7?)<br>
<br>
We need to consider them.<br>
<br>
* warning message<br>
* warning level<br>
* ?<br>
<br>
<br>
<br>
-- <br>
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</blockquote></div><br clear=3D"all"><div><br></div>-- <br><div dir=3D"ltr"=
 class=3D"gmail_signature">Austin Ziegler =E2=80=A2 <a href=3D"mailto:halos=
tatue@gmail.com" target=3D"_blank">halostatue@gmail.com</a> =E2=80=A2 <a hr=
ef=3D"mailto:austin@halostatue.ca" target=3D"_blank">austin@halostatue.ca</=
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