[ruby-core:93415] [Ruby trunk Feature#14385] Deprecate back-tick for Ruby 3.

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 $() is prefered over backticks for that reason.
> How would you express such a call with backticks without ambiguities : 
> 
> ~~~ text
> foo=$(echo $(whoami))
> echo $foo
> ~~~
> 
> The example is trivial but I think you got the point ;)

It's just this isn't it?

```ruby
foo=`echo #{`whoami`}`
```

Your argument would also hold for string literals with " and ', yet pretty much everyone uses them over %s{} %{} etc, unless there is too much nesting.
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 compared 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/DevelopersMeeting20171212Japan#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
* ?



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